Java实训第六次总结

一、创建应用程序类

package net.dc.student.app;

import net.dc.student.gui.LoginFrame;
import net.dc.student.gui.MainFrame;
import net.dc.student.gui.RegisterFrame;

/**
 * 功能：应用程序类，存放全局数据
 * 作者：邓聪
 * 日期：2020年07月11日
 */
public class Application {
    
    
    public static int id; // 登录用户标识符
    public static String username; // 登录用户名
    public static String password; // 登录用户密码
    public static LoginFrame loginFrame; // 登录窗口
    public static MainFrame mainFrame; // 主窗口
    public static RegisterFrame registerFrame; // 注册窗口
}

二、创建窗口界面类
（一）、MainFrame

package net.dc.student.gui;

import net.dc.student.app.Application;
import net.dc.student.bean.Status;
import net.dc.student.service.StatusService;
import net.dc.student.service.impl.StatusServiceImpl;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.IOException;

/**
 * 功能：主界面窗口
 *      通过菜单系统调用各功能模块
 * 作者：邓聪
 * 日期：2020年07月11日
 */
public class MainFrame extends JFrame {
    
    
    private JMenuBar mnbMain; // 主菜单栏

    private JMenu mnuSet; // 设置菜单
    private JMenuItem mniSetCollegeInfo;
    private JMenuItem mniSetStatusBar;
    private JMenuItem mniChangePassword;
    private JMenuItem mniExit;

    private JMenu mnuOperate; // 操作菜单
    private JMenuItem mniAddStudent;
    private JMenuItem mniBrowseStudent;
    private JMenuItem mniEditStudent;

    private JMenu mnuDelStu; // 删除菜单
    private JMenuItem mniDelStudentById;
    private JMenuItem mniDelStudentsByClass;
    private JMenuItem mniDelStudentsByDepartment;

    private JMenu mnuFind; // 查询菜单
    private JMenuItem mniFindStudentById;
    private JMenuItem mniFindStudentsByName;
    private JMenuItem mniFindStudentsByClass;
    private JMenuItem mniFindStudentsByDepartment;

    private JMenu mnuCount; // 统计菜单
    private JMenuItem mniCountStudentsBySex;
    private JMenuItem mniCountStudentsByClass;
    private JMenuItem mniCountStudentsByDepartment;

    private JMenu mnuHelp; // 帮助菜单
    private JMenuItem mniHelp;
    private JMenuItem mniAbout;

    private JPanel panel; // 面板
    private JPanel  pnlCenter;
    private JPanel  pnlSouth;

    private JLabel lblStatusBar; // 状态栏标签
    private JLabel lblBackground; // 背景标签

    private ImageIcon imgCollege;
    private ImageIcon imgExit;
    private ImageIcon imgPassword;
    private ImageIcon imgQuery;
    private ImageIcon imgBrowse;
    private ImageIcon imgCount;
    private ImageIcon imgBackground;

    private JToolBar toolbar; // 工具栏

    private JButton btnSetCollege;
    private JButton btnChangePassword;
    private JButton btnFindStudentById;
    private JButton btnExit;
    private JButton btnBrowseStudent;
    private JButton btnCountByDepartment;

    private Status status; // 状态对象
    private StatusService statusService; // 状态服务对象

    public MainFrame(String title) {
    
    
        super(title);
        initGUI();
    }

    /**
     * 初始化图形用户界面
     */
    private void initGUI() {
    
    
        // 创建主菜单
        mnbMain = new JMenuBar();

        // 创建【设置】菜单及其菜单项
        mnuSet = new JMenu("系统设置[S]");
        mnuSet.setMnemonic(KeyEvent.VK_S);
        mniSetCollegeInfo = new JMenuItem("学校信息");
        mniSetStatusBar = new JMenuItem("状态栏信息");
        mniChangePassword = new JMenuItem("修改密码");
        mniExit = new JMenuItem("退出系统");

        // 创建【操作】菜单及其菜单项
        mnuOperate = new JMenu("数据操作[O]");
        mnuOperate.setMnemonic(KeyEvent.VK_O);
        mniAddStudent = new JMenuItem("增加学生表记录");
        mnuDelStu = new JMenu("删除学生表记录");
        mniEditStudent = new JMenuItem("编辑学生表记录");
        mniBrowseStudent = new JMenuItem("浏览学生表记录");

        // 创建【删除学生表记录】的子菜单
        mniDelStudentById = new JMenuItem("按学号删除");
        mniDelStudentsByClass = new JMenuItem("按班级删除");
        mniDelStudentsByDepartment = new JMenuItem("按系部删除");

        // 创建【查询】菜单及其菜单项
        mnuFind = new JMenu("查询学生[Q]");
        mnuFind.setMnemonic(KeyEvent.VK_Q);
        mniFindStudentById = new JMenuItem("按学号查询");
        mniFindStudentsByName = new JMenuItem("按姓名查询");
        mniFindStudentsByClass = new JMenuItem("按班级查询");
        mniFindStudentsByDepartment = new JMenuItem("按系部查询");

        // 创建【统计】菜单及其菜单项
        mnuCount = new JMenu("人数统计[C]");
        mnuCount.setMnemonic(KeyEvent.VK_C);
        mniCountStudentsBySex = new JMenuItem("按性别统计");
        mniCountStudentsByClass = new JMenuItem("按班级统计");
        mniCountStudentsByDepartment = new JMenuItem("按系部统计");

        // 创建【帮助】菜单及其菜单项
        mnuHelp = new JMenu("帮助[H]");
        mnuHelp.setMnemonic(KeyEvent.VK_H);
        mniHelp = new JMenuItem("帮助");
        mniAbout = new JMenuItem("关于");

        // 创建图标对象
        imgCollege = new ImageIcon("images/college.png");
        imgPassword = new ImageIcon("images/password.png");
        imgQuery = new ImageIcon("images/query.png");
        imgBrowse = new ImageIcon("images/browse.png");
        imgCount = new ImageIcon("images/count.png");
        imgExit = new ImageIcon("images/exit.png");

        // 创建工具栏
        toolbar = new JToolBar();
        btnSetCollege = new JButton("设置学校", imgCollege);
        btnSetCollege.setToolTipText("设置学校信息");
        btnSetCollege.setVerticalTextPosition(AbstractButton.BOTTOM);
        btnSetCollege.setHorizontalTextPosition(AbstractButton.CENTER);
        btnChangePassword = new JButton("修改密码", imgPassword);
        btnChangePassword.setToolTipText("修改用户密码");
        btnChangePassword.setVerticalTextPosition(AbstractButton.BOTTOM);
        btnChangePassword.setHorizontalTextPosition(AbstractButton.CENTER);
        btnBrowseStudent = new JButton("浏览学生", imgBrowse);
        btnBrowseStudent.setToolTipText("浏览学生记录");
        btnBrowseStudent.setVerticalTextPosition(AbstractButton.BOTTOM);
        btnBrowseStudent.setHorizontalTextPosition(AbstractButton.CENTER);
        btnFindStudentById = new JButton("查询学生", imgQuery);
        btnFindStudentById.setToolTipText("按学号查询学生记录");
        btnFindStudentById.setVerticalTextPosition(AbstractButton.BOTTOM);
        btnFindStudentById.setHorizontalTextPosition(AbstractButton.CENTER);
        btnCountByDepartment = new JButton("统计人数", imgCount);
        btnCountByDepartment.setToolTipText("按系部统计学生人数");
        btnCountByDepartment.setVerticalTextPosition(AbstractButton.BOTTOM);
        btnCountByDepartment.setHorizontalTextPosition(AbstractButton.CENTER);
        btnExit = new JButton("退出系统", imgExit);
        btnExit.setToolTipText("退出系统");
        btnExit.setVerticalTextPosition(AbstractButton.BOTTOM);
        btnExit.setHorizontalTextPosition(AbstractButton.CENTER);
        toolbar.add(btnSetCollege);
        toolbar.add(btnChangePassword);
        toolbar.add(btnBrowseStudent);
        toolbar.add(btnFindStudentById);
        toolbar.add(btnCountByDepartment);
        toolbar.add(btnExit);

        // 创建面板
        panel = (JPanel) getContentPane();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();
        pnlSouth.setLayout(new FlowLayout(FlowLayout.LEFT));

        // 创建背景图片
        imgBackground = new ImageIcon("images/background.jpg");
        // 创建背景标签
        lblBackground = new JLabel(imgBackground);
        // 创建状态栏标签
        lblStatusBar = new JLabel();

        // 设置菜单栏
        setJMenuBar(mnbMain);
        // 添加【设置】菜单
        mnbMain.add(mnuSet);
        mnuSet.add(mniSetCollegeInfo);
        mnuSet.add(mniSetStatusBar);
        mnuSet.add(mniChangePassword);
        mnuSet.addSeparator();
        mnuSet.add(mniExit);

        // 添加【删除学生表记录】菜单
        mnuDelStu.add(mniDelStudentById);
        mnuDelStu.add(mniDelStudentsByClass);
        mnuDelStu.add(mniDelStudentsByDepartment);

        // 添加【操作】菜单
        mnbMain.add(mnuOperate);
        mnuOperate.add(mniAddStudent);
        mnuOperate.add(mniEditStudent);
        mnuOperate.add(mnuDelStu);
        mnuOperate.add(mniBrowseStudent);

        // 添加【查询】菜单
        mnbMain.add(mnuFind);
        mnuFind.add(mniFindStudentById);
        mnuFind.add(mniFindStudentsByName);
        mnuFind.add(mniFindStudentsByClass);
        mnuFind.add(mniFindStudentsByDepartment);

        // 添加【统计】菜单
        mnbMain.add(mnuCount);
        mnuCount.add(mniCountStudentsBySex);
        mnuCount.add(mniCountStudentsByClass);
        mnuCount.add(mniCountStudentsByDepartment);

        // 添加【帮助】菜单
        mnbMain.add(mnuHelp);
        mnuHelp.add(mniHelp);
        mnuHelp.add(mniAbout);

        // 添加面板
        panel.setLayout(new BorderLayout());
        panel.add(toolbar, "North");
        panel.add(pnlCenter, "Center");
        panel.add(pnlSouth, "South");
        pnlCenter.add(lblBackground);
        pnlSouth.add(lblStatusBar);

        // 非管理员不能设置状态栏
        if (!Application.username.equals("admin")) {
    
    
            mniSetStatusBar.setEnabled(false);
            mniAddStudent.setEnabled(false);
            mnuDelStu.setEnabled(false);
            mniEditStudent.setEnabled(false);
        }

        // 设置状态栏信息
        setStatusBar();

        // 创建状态服务对象
        statusService = new StatusServiceImpl();
        // 获取状态对象
        status = statusService.findStatusById(1);

        // 设置窗口尺寸
        setSize(800, 640);
        // 设置窗口可见
        setVisible(true);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口标题
        setTitle("学生信息管理系统" + status.getVersion());

        // 注册窗口监听器，继承窗口适配器，编写事件处理方法
        addWindowListener(new WindowAdapter() {
    
    
            @Override
            public void windowClosing(WindowEvent e) {
    
    
                exitSystem();
            }
        });

        // 设置菜单
        // 【设置学校信息】菜单项单击事件
        mniSetCollegeInfo.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new SetCollegeInfoFrame("");
            }
        });

        // 【设置状态栏信息】菜单项单击事件
        mniSetStatusBar.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new SetStatusBarFrame("");
            }
        });

        // 【修改密码】菜单项单击事件
        mniChangePassword.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new ChangePasswordFrame("");
            }
        });

        // 【退出系统】菜单项单击事件
        mniExit.addActionListener(new ActionListener() {
    
    
            public void actionPerformed(ActionEvent e) {
    
    
                exitSystem();
            }
        });

        // 查询菜单
        // 【按学号查询】菜单项单击事件
        mniFindStudentById.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new FindStudentByIdFrame("");
            }
        });

        // 【按姓名查询】菜单项单击事件
        mniFindStudentsByName.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new FindStudentsByNameFrame("");
            }
        });

        // 【按班级查询】菜单项单击事件
        mniFindStudentsByClass.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new FindStudentsByClassFrame("");
            }
        });

        // 【按系部查询】菜单项单击事件
        mniFindStudentsByDepartment.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new FindStudentsByDepartmentFrame("");
            }
        });

        // 统计菜单
        // 【按性别统计人数】菜单项单击事件
        mniCountStudentsBySex.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new CountStudentsBySexFrame("");
            }
        });

        // 【按班级统计人数】菜单项单击事件
        mniCountStudentsByClass.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new CountStudentsByClassFrame("");
            }
        });

        // 【按系部统计人数】菜单项单击事件
        mniCountStudentsByDepartment.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new CountStudentsByDepartmentFrame("");
            }
        });

        // 【增加学生记录】菜单项单击事件
        mniAddStudent.addActionListener(new ActionListener() {
    
    
            public void actionPerformed(ActionEvent e) {
    
    
                new AddStudentFrame("");
            }
        });

        // 【按学号删除学生记录】菜单项单击事件
        mniDelStudentById.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new DeleteStudentByIdFrame("");
            }
        });

        // 【按班级删除学生记录】菜单项单击事件
        mniDelStudentsByClass.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new DeleteStudentsByClassFrame("");
            }
        });

        // 【按系部删除学生记录】菜单项单击事件
        mniDelStudentsByDepartment.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new DeleteStudentsByDepartmentFrame("");
            }
        });

        // 【编辑学生记录】菜单项单击事件
        mniEditStudent.addActionListener(new ActionListener() {
    
    
            public void actionPerformed(ActionEvent e) {
    
    
                new EditStudentFrame("");
            }
        });

        // 【浏览学生记录】菜单项单击事件
        mniBrowseStudent.addActionListener(new ActionListener() {
    
    
            public void actionPerformed(ActionEvent e) {
    
    
                new BrowseStudentsFrame("");
            }
        });

        // 【帮助】菜单单击事件
        mniHelp.addActionListener(new ActionListener() {
    
    
            public void actionPerformed(ActionEvent e) {
    
    
                try {
    
    
                    Runtime.getRuntime().exec("cmd /c start help/帮助文档.chm");
                } catch (IOException e1) {
    
    
                    JOptionPane.showMessageDialog(null, e1.getMessage(), "学生信息管理系统", JOptionPane.ERROR_MESSAGE);
                }
            }
        });

        // 【关于】菜单单击事件
        mniAbout.addActionListener(new ActionListener() {
    
    
            public void actionPerformed(ActionEvent e) {
    
    
                JOptionPane.showMessageDialog(null,
                        "开发人员：" + status.getCollege() + "_" + status.getAuthor() + "\n联系电话：" + status.getTelephone()
                                + "\n电子邮箱：" + status.getEmail(),
                        "学生信息管理系统" + status.getVersion(), JOptionPane.INFORMATION_MESSAGE);
            }
        });

        // 工具栏按钮单击事件
        // 【设置学校信息】按钮
        btnSetCollege.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new SetCollegeInfoFrame("");
            }
        });

        // 【修改密码】按钮
        btnChangePassword.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new ChangePasswordFrame("");
            }
        });

        // 【浏览】按钮
        btnBrowseStudent.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new BrowseStudentsFrame("");
            }
        });

        // 【查询】按钮
        btnFindStudentById.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new FindStudentByIdFrame("");
            }
        });

        // 【统计】按钮
        btnCountByDepartment.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                new CountStudentsByDepartmentFrame("");
            }
        });

        // 【退出】按钮
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                exitSystem();
            }
        });
    }

    /**
     * 退出系统（询问用户是否要退出）
     */
    private void exitSystem() {
    
    
        int choice = JOptionPane.showConfirmDialog(this,
                "您是否要退出系统？","学生信息管理系统", JOptionPane.YES_NO_OPTION);
        if (choice == JOptionPane.YES_OPTION) {
    
    
            System.exit(0);
        } else {
    
    
            // 卸载当前窗口
            dispose();
            // 重新显示主窗口
            Application.mainFrame = new MainFrame("学生信息管理系统" + status.getVersion());
        }
    }

    /**
     * 设置状态栏信息
     */
    public void setStatusBar() {
    
    
        // 创建状态服务对象
        statusService = new StatusServiceImpl();
        // 获取状态栏对象
        status = statusService.findStatusById(1);
        // 设置状态栏标签
        lblStatusBar.setText(
                status.getCollege() + "学生信息管理系统" + status.getVersion() + "      作者：" + status.getAuthor() + "      地址："
                        + status.getAddress() + "      电话：" + status.getTelephone() + "      邮箱：" + status.getEmail());
    }

    public static void main(String[] args) {
    
    
        Application.mainFrame = new MainFrame("");
    }
}

（二）、RegisterFrame

package net.dc.student.gui;

import net.dc.student.app.Application;
import net.dc.student.bean.User;
import net.dc.student.service.UserService;
import net.dc.student.service.impl.UserServiceImpl;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.Timestamp;
import java.util.Date;

/**
 * 功能：注册窗口
 * 作者：邓聪
 * 日期：2020年07月11日
 */
public class RegisterFrame extends JFrame {
    
    
    private JLabel lblUsername;
    private JLabel lblPassword;
    private JLabel lblTelephone;

    private JTextField txtUsername;
    private JTextField txtTelephone;
    private JPasswordField txtPassword;

    private JButton btnSubmit;
    private JButton btnCancel;
    private JButton btnLogin;

    private JPanel panel;
    private JPanel panel1;
    private JPanel panel2;
    private JPanel panel3;
    private JPanel panel4;

    private String username;
    private String password;
    private String telephone;
    private Date registerTime;

    public RegisterFrame(String title) {
    
    
        super(title);
        initGUI();
    }

    private void initGUI() {
    
    
        // 创建组件（面板与组件）
        panel = (JPanel) getContentPane();
        panel1 = new JPanel();
        panel2 = new JPanel();
        panel3 = new JPanel();
        panel4 = new JPanel();

        lblUsername = new JLabel("用户名:");
        lblPassword = new JLabel("密  码:");
        lblTelephone = new JLabel("电  话:");
        txtUsername = new JTextField(15);
        txtPassword = new JPasswordField(15);
        txtTelephone = new JTextField(15);
        btnSubmit = new JButton("提交[S]");
        btnCancel = new JButton("取消[C]");
        btnLogin = new JButton("登陆[L]");

        // 将控件添加到四个小面板
        panel1.add(lblUsername);
        panel1.add(txtUsername);
        panel2.add(lblPassword);
        panel2.add(txtPassword);
        panel3.add(lblTelephone);
        panel3.add(txtTelephone);
        panel4.add(btnSubmit);
        panel4.add(btnCancel);
        panel4.add(btnLogin);

        // 设置大面板布局，将四个小面板添加到大面板
        panel.setLayout(new GridLayout(4, 1));
        panel.add(panel1);
        panel.add(panel2);
        panel.add(panel3);
        panel.add(panel4);

        // 设置窗口大小
        setSize(250, 200);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口刚好容纳组件
        pack();
        // 设置窗口标题
        setTitle("用户注册");
        // 设置窗口可见
        setVisible(true);

        // 注册窗口监听器
        addWindowListener(new WindowAdapter() {
    
    
            @Override
            public void windowClosing(WindowEvent e) {
    
    
                // 卸载当前注册窗口
                dispose();
                // 让登陆窗口可见
                Application.loginFrame.setVisible(true);
            }
        });

        // 提交事件，单击按钮处理
        btnSubmit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                register();
            }
        });

        btnSubmit.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    register();
                }
            }
        });

        btnCancel.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                // 显示登录窗口
                Application.loginFrame.setVisible(true);
                // 卸载当前窗口
                dispose();
            }
        });

        btnLogin.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                // 显示登录窗口
                Application.loginFrame.setVisible(true);
                // 卸载当前窗口
                dispose();
            }
        });

        // 用户名文本框按键事件处理
        txtUsername.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtPassword.requestFocus();
                }
            }
        });

        // 密码文本框按键事件处理
        txtPassword.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == 10) {
    
    
                    txtTelephone.requestFocus();
                }
            }
        });

        // [电话]文本框按键事件处理
        txtTelephone.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    btnSubmit.requestFocus();
                }
            }
        });
    }

    private void register() {
    
    
        // 获取用户名
        username = txtUsername.getText().trim();
        // 获取密码
        password = new String(txtPassword.getPassword());
        // 获取电话
        telephone = txtTelephone.getText().trim();
        // 定义当前时间为注册时间
        registerTime = new Timestamp(System.currentTimeMillis());

        // 对用户名进行非空校验
        if (username.equals("")) {
    
    
            JOptionPane.showMessageDialog(null, "用户名不能为空！",
                    "学生信息管理系统", JOptionPane.WARNING_MESSAGE);
            txtUsername.requestFocus();
            return;
        }

        // 对密码进行非空校验
        if (password.equals("")) {
    
    
            JOptionPane.showMessageDialog(null, "密码不能为空！",
                    "学生信息管理系统", JOptionPane.WARNING_MESSAGE);
            txtPassword.requestFocus();
            return;
        }

        // 定义用户服务对象
        UserService userService = new UserServiceImpl();
        // 创建用户
        User user = new User();
        user.setUsername(username);
        user.setPassword(password);
        user.setTelephone(telephone);
        user.setRegisterTime(registerTime);

        // 添加用户
        int count = userService.addUser(user);

        // 判断是否添加成功
        if (count > 0) {
    
    
            setVisible(false);
            JOptionPane.showMessageDialog(null, "恭喜！注册成功！",
                    "学生信息管理系统", JOptionPane.INFORMATION_MESSAGE);
            setVisible(true);
        } else {
    
    
            JOptionPane.showMessageDialog(null, "遗憾！注册失败！",
                    "学生信息管理系统", JOptionPane.INFORMATION_MESSAGE);
        }
    }

    public static void main(String[] args) {
    
    
        Application.registerFrame = new RegisterFrame("用户注册");
    }
}

运行效果：

（三）、LoginFrame

package net.dc.student.gui;

import net.dc.student.app.Application;
import net.dc.student.bean.Status;
import net.dc.student.bean.User;
import net.dc.student.service.StatusService;
import net.dc.student.service.UserService;
import net.dc.student.service.impl.StatusServiceImpl;
import net.dc.student.service.impl.UserServiceImpl;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

/**
 * 功能：登录窗口
 * 作者：邓聪
 * 日期：2020年07月11日
 */
public class LoginFrame extends JFrame {
    
    
    private String username;
    private String password;

    private JLabel lblUsername;
    private JLabel lblPassword;
    private JTextField txtUsername;
    private JPasswordField txtPassword;

    private JButton btnOK;
    private JButton btnCancel;
    private JButton btnRegister;

    private JPanel panel, panel1, panel2, panel3;

    // 添加单参构造方法
    public LoginFrame(String title) {
    
    
        super(title);
        initGUI();
    }

    private void initGUI() {
    
    
        // 实例化组件（面板与组件）
        panel = (JPanel) getContentPane();
        panel1 = new JPanel();
        panel2 = new JPanel();
        panel3 = new JPanel();
        lblUsername = new JLabel("用户名:");
        lblPassword = new JLabel("密     码:");
        txtUsername = new JTextField(15);
        txtPassword = new JPasswordField(15);
        btnOK = new JButton("确定[O]");
        btnCancel = new JButton("取消[C]");
        btnRegister = new JButton("注册[R]");

        // 将控件添加到三个小面板
        panel1.add(lblUsername);
        panel1.add(txtUsername);
        panel2.add(lblPassword);
        panel2.add(txtPassword);
        panel3.add(btnOK);
        panel3.add(btnCancel);
        panel3.add(btnRegister);

        // 设置主面板为三行一列的网格布局
        panel.setLayout(new GridLayout(3, 1));
        panel.add(panel1);
        panel.add(panel2);
        panel.add(panel3);

        // 设置按钮热键字母
        btnOK.setMnemonic(KeyEvent.VK_O);
        btnCancel.setMnemonic(KeyEvent.VK_C);
        btnRegister.setMnemonic(KeyEvent.VK_R);

        // 设置窗口尺寸
        setSize(250, 200);
        // 设置屏幕窗口居中
        setLocationRelativeTo(null);
        // 设置窗口不可调整大小
        setResizable(false);
        pack();
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // [确定]按钮单击事件处理
        btnOK.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                login();
            }
        });

        // [确定]按钮按键事件处理
        btnOK.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    login();
                }
            }
        });

        // [用户名]文本框按键事件处理
        txtUsername.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                // 判断是否按下回车键
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtPassword.requestFocus();
                }
            }
        });

        // [密码]文本框按键事件处理
        txtPassword.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                // 判断是否按了回车键
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    login();
                }
            }
        });

        btnCancel.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                txtUsername.setText("");
                txtPassword.setText("");
            }
        });

        btnRegister.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                // 隐藏登录窗口
                Application.loginFrame.setVisible(false);
                // 创建注册窗口
                Application.registerFrame = new RegisterFrame("用户注册");
            }
        });
    }


    /**
     * 登录方法
     */
    private void login() {
    
    
        // 获取用户名
        username = txtUsername.getText().trim();
        // 获取密码
        password = new String(txtPassword.getPassword());

        // 创建用户服务对象
        UserService userService = new UserServiceImpl();
        // 调用登录方法，返回登录用户对象
        User user = userService.login(username, password);

        // 判断登录用户是否为空，决定登录是否成功
        if (user != null) {
    
    
            // 隐藏登录窗口
            Application.loginFrame.setVisible(false);
            // 定义状态服务对象
            StatusService statusService = new StatusServiceImpl();
            // 获取状态对象
            Status status = statusService.findStatusById(1);
            // 保存登录用户的信息
            Application.id = user.getId();
            Application.username = user.getUsername();
            Application.password = user.getPassword();
            // 提示用户登录成功
            JOptionPane.showMessageDialog(null,
                    "欢迎使用学生信息管理系统" + status.getVersion(),
                    "用户登录", JOptionPane.INFORMATION_MESSAGE);
            // 显示系统主窗口
            Application.mainFrame = new MainFrame("");
            // 释放登录窗口
            Application.loginFrame.dispose();
        } else {
    
    
            // 隐藏登录窗口
            Application.loginFrame.setVisible(false);
            // 提示用户登录失败，要重新输入用户名或密码
            JOptionPane.showMessageDialog(null,
                    "用户名或密码错误，请重新输入！",
                    "用户登录", JOptionPane.ERROR_MESSAGE);
            // 显示登录窗口
            Application.loginFrame.setVisible(true);
            // 用户名文本框内容全选
            txtUsername.selectAll();
            // 密码文本框内容全选
            txtPassword.selectAll();
            // 用户名文本框获取焦点
            txtUsername.requestFocus();
        }
    }

    public static void main(String[] args) {
    
    
        Application.loginFrame = new LoginFrame("用户登录");
    }
}

运行效果：

接下来就只简单展示一下代码
（四）、AddStudentFrame

package net.dc.student.gui;

import net.dc.student.bean.Student;
import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

import java.util.List;

/**
 * 功能：添加学生记录
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class AddStudentFrame extends JFrame {
    
    
    private JPanel panel;
    private JPanel pnlCenter;
    private JPanel pnlRow1;
    private JPanel pnlRow2;
    private JPanel pnlRow3;
    private JPanel pnlRow4;
    private JPanel pnlRow5;
    private JPanel pnlRow6;
    private JPanel pnlRow7;
    private JPanel pnlSouth;

    private JLabel lblId;
    private JLabel lblName;
    private JLabel lblSex;
    private JLabel lblAge;
    private JLabel lblDepartment;
    private JLabel lblClass;
    private JLabel lblTelephone;

    private JTextField txtId;
    private JTextField txtName;
    private JTextField txtSex;
    private JTextField txtAge;
    private JTextField txtDepartment;
    private JTextField txtClass;
    private JTextField txtTelephone;

    private JButton btnExit;
    private JButton btnOK;
    private JButton btnCancel;

    private int currentRow; // 当前记录行号
    private List<Student> students; // 学生列表

    public AddStudentFrame(String title) {
    
    
        super(title);
        initGUI();
    }

    /**
     * 初始化用户界面
     */
    private void initGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        pnlRow1 = new JPanel();
        pnlRow2 = new JPanel();
        pnlRow3 = new JPanel();
        pnlRow4 = new JPanel();
        pnlRow5 = new JPanel();
        pnlRow6 = new JPanel();
        pnlRow7 = new JPanel();

        pnlRow1.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow2.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow3.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow4.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow5.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow6.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow7.setLayout(new FlowLayout(FlowLayout.LEFT));

        lblId = new JLabel("学号：");
        lblName = new JLabel("姓名：");
        lblSex = new JLabel("性别：");
        lblAge = new JLabel("年龄：");
        lblDepartment = new JLabel("系部：");
        lblClass = new JLabel("班级：");
        lblTelephone = new JLabel("电话：");

        txtId = new JTextField(20);
        txtName = new JTextField(20);
        txtSex = new JTextField(20);
        txtAge = new JTextField(20);
        txtDepartment = new JTextField(20);
        txtClass = new JTextField(20);
        txtTelephone = new JTextField(20);
        btnOK = new JButton("确定[O]");
        btnCancel = new JButton("取消[C]");
        btnExit = new JButton("退出[X]");
        btnOK.setMnemonic(KeyEvent.VK_O);
        btnCancel.setMnemonic(KeyEvent.VK_C);
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.setLayout(new BorderLayout());
        panel.add(pnlCenter, BorderLayout.CENTER);
        panel.add(pnlSouth, BorderLayout.SOUTH);
        pnlCenter.setLayout(new GridLayout(7, 1));
        pnlCenter.add(pnlRow1);
        pnlCenter.add(pnlRow2);
        pnlCenter.add(pnlRow3);
        pnlCenter.add(pnlRow4);
        pnlCenter.add(pnlRow5);
        pnlCenter.add(pnlRow6);
        pnlCenter.add(pnlRow7);

        pnlRow1.add(lblId);
        pnlRow1.add(txtId);
        pnlRow2.add(lblName);
        pnlRow2.add(txtName);
        pnlRow3.add(lblSex);
        pnlRow3.add(txtSex);
        pnlRow4.add(lblAge);
        pnlRow4.add(txtAge);
        pnlRow5.add(lblDepartment);
        pnlRow5.add(txtDepartment);
        pnlRow6.add(lblClass);
        pnlRow6.add(txtClass);
        pnlRow7.add(lblTelephone);
        pnlRow7.add(txtTelephone);

        pnlSouth.add(btnOK);
        pnlSouth.add(btnCancel);
        pnlSouth.add(btnExit);

        // 设置窗口属性
        setSize(500, 300);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口刚好容纳组件
        pack();
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口标题
        setTitle("添加学生记录");
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 【确定】按钮单击事件
        btnOK.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                // 学号非空校验
                if (txtId.getText().trim().equals("")) {
    
    
                    JOptionPane.showMessageDialog(null, "学号不能为空！", "增加学生记录", JOptionPane.WARNING_MESSAGE);
                    txtId.requestFocus();
                    return;
                }

                // 年龄数字校验
                if (!isNumber(txtAge.getText().trim())) {
    
    
                    JOptionPane.showMessageDialog(null, "注意：年龄全由数字构成！", "增加学生记录", JOptionPane.WARNING_MESSAGE);
                    txtAge.setText("");
                    txtAge.requestFocus();
                    return;
                }

                // 创建学生实体
                Student student = new Student();
                // 设置学生实体属性
                student.setId(txtId.getText().trim());
                student.setName(txtName.getText().trim());
                student.setSex(txtSex.getText().trim());
                student.setAge(Integer.parseInt(txtAge.getText()));
                student.setDepartment(txtDepartment.getText().trim());
                student.setClazz(txtClass.getText().trim());
                student.setTelephone(txtTelephone.getText().trim());

                // 创建学生服务对象
                StudentService studentService = new StudentServiceImpl();
                // 添加学生记录
                int count = studentService.addStudent(student);
                // 判断是否添加成功
                if (count > 0) {
    
    
                    JOptionPane.showMessageDialog(null, "添加记录成功！", "增加学生记录", JOptionPane.INFORMATION_MESSAGE);
                    txtId.setText("");
                    txtName.setText("");
                    txtSex.setText("");
                    txtAge.setText("");
                    txtDepartment.setText("");
                    txtClass.setText("");
                    txtTelephone.setText("");
                    txtId.requestFocus();
                } else {
    
    
                    JOptionPane.showMessageDialog(null, "添加记录失败！", "增加学生记录", JOptionPane.ERROR_MESSAGE);
                }
            }
        });

        // 【取消】按钮单击事件处理
        btnCancel.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                txtId.setText("");
                txtName.setText("");
                txtSex.setText("");
                txtAge.setText("");
                txtDepartment.setText("");
                txtClass.setText("");
                txtTelephone.setText("");
                txtId.requestFocus();
            }
        });

        // 【退出】按钮单击事件处理
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                dispose();
            }
        });

        // 【学号】文本框按键事件处理
        txtId.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    if (!txtId.getText().trim().equals("")) {
    
    
                        txtName.requestFocus();
                    }
                }
            }
        });

        // 【姓名】文本框按键事件处理
        txtName.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtSex.requestFocus();
                }
            }
        });

        // 【性别】文本框按键事件处理
        txtSex.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtAge.requestFocus();
                }
            }
        });

        // 【年龄】文本框按键事件处理
        txtAge.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtDepartment.requestFocus();
                }
            }
        });

        // 【系部】文本框按键事件处理
        txtDepartment.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtClass.requestFocus();
                }
            }
        });

        // 【班级】文本框按键事件处理
        txtClass.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtTelephone.requestFocus();
                }
            }
        });
    }

    /**
     * 判断一个字符串是否全是数字
     *
     * @param str
     * @return
     */
    boolean isNumber(String str) {
    
    
        for (int i = 0; i < str.length(); i++) {
    
    
            if (str.charAt(i) < '0' || str.charAt(i) > '9') {
    
    
                return false;
            }
        }
        return true;
    }

    /**
     * 主方法
     *
     * @param args
     */
    public static void main(String[] args) {
    
    
        new AddStudentFrame("");
    }
}

（五）、BrowseStudentsFrame

package net.dc.student.gui;

import net.dc.student.bean.Student;
import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.List;

/**
 * 功能：浏览学生记录
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class BrowseStudentsFrame extends JFrame {
    
    
    private JPanel panel;
    private JPanel pnlCenter;
    private JPanel pnlRow1;
    private JPanel pnlRow2;
    private JPanel pnlRow3;
    private JPanel pnlRow4;
    private JPanel pnlRow5;
    private JPanel pnlRow6;
    private JPanel pnlRow7;
    private JPanel pnlSouth;

    private JLabel lblId;
    private JLabel lblName;
    private JLabel lblSex;
    private JLabel lblAge;
    private JLabel lblDepartment;
    private JLabel lblClass;
    private JLabel lblTelephone;

    private JTextField txtId;
    private JTextField txtName;
    private JTextField txtSex;
    private JTextField txtAge;
    private JTextField txtDepartment;
    private JTextField txtClass;
    private JTextField txtTelephone;

    private JButton btnTop;
    private JButton btnPrevious;
    private JButton btnNext;
    private JButton btnBottom;
    private JButton btnExit;

    private int currentRow;// 当前记录行号
    private List<Student> students;// 学生列表对象
    StudentService studentService;// 学生服务对象

    public BrowseStudentsFrame(String title) {
    
    
        super(title);
        initGUI();
    }

    /**
     * 初始化用户界面
     */
    private void initGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        pnlRow1 = new JPanel();
        pnlRow2 = new JPanel();
        pnlRow3 = new JPanel();
        pnlRow4 = new JPanel();
        pnlRow5 = new JPanel();
        pnlRow6 = new JPanel();
        pnlRow7 = new JPanel();

        pnlRow1.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow2.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow3.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow4.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow5.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow6.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow7.setLayout(new FlowLayout(FlowLayout.LEFT));

        lblId = new JLabel("学号:");
        lblName = new JLabel("姓名:");
        lblSex = new JLabel("性别:");
        lblAge = new JLabel("年龄:");
        lblDepartment = new JLabel("系部:");
        lblClass = new JLabel("班级:");
        lblTelephone = new JLabel("电话:");

        txtId = new JTextField(40);
        txtName = new JTextField(40);
        txtSex = new JTextField(40);
        txtAge = new JTextField(40);
        txtDepartment = new JTextField(40);
        txtClass = new JTextField(40);
        txtTelephone = new JTextField(40);
        txtId.setEditable(false);
        txtName.setEditable(false);
        txtSex.setEditable(false);
        txtAge.setEditable(false);
        txtDepartment.setEditable(false);
        txtClass.setEditable(false);
        txtTelephone.setEditable(false);

        btnTop = new JButton("第一条[T]");
        btnPrevious = new JButton("上一条[P]");
        btnNext = new JButton("下一条[N]");
        btnBottom = new JButton("最后一条[B]");
        btnExit = new JButton("退出[X]");
        btnTop.setMnemonic(KeyEvent.VK_T);
        btnPrevious.setMnemonic(KeyEvent.VK_P);
        btnNext.setMnemonic(KeyEvent.VK_N);
        btnBottom.setMnemonic(KeyEvent.VK_B);
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.setLayout(new BorderLayout());
        panel.add(pnlCenter, BorderLayout.CENTER);
        panel.add(pnlSouth, BorderLayout.SOUTH);
        pnlCenter.setLayout(new GridLayout(7, 1));

        pnlCenter.add(pnlRow1);
        pnlCenter.add(pnlRow2);
        pnlCenter.add(pnlRow3);
        pnlCenter.add(pnlRow4);
        pnlCenter.add(pnlRow5);
        pnlCenter.add(pnlRow6);
        pnlCenter.add(pnlRow7);

        pnlRow1.add(lblId);
        pnlRow1.add(txtId);
        pnlRow2.add(lblName);
        pnlRow2.add(txtName);
        pnlRow3.add(lblSex);
        pnlRow3.add(txtSex);
        pnlRow4.add(lblAge);
        pnlRow4.add(txtAge);
        pnlRow5.add(lblDepartment);
        pnlRow5.add(txtDepartment);
        pnlRow6.add(lblClass);
        pnlRow6.add(txtClass);
        pnlRow7.add(lblTelephone);
        pnlRow7.add(txtTelephone);

        pnlSouth.add(btnTop);
        pnlSouth.add(btnPrevious);
        pnlSouth.add(btnNext);
        pnlSouth.add(btnBottom);
        pnlSouth.add(btnExit);

        // 设置窗口属性
        setSize(500, 300);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口刚好容纳组件
        pack();
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 创建学生服务对象
        studentService = new StudentServiceImpl();
        // 获取全部学生列表
        students = studentService.findAllStudents();
        // 判断是否有学生记录
        if (students.size() > 0) {
    
    
            // 设置当前行号
            currentRow = 1;
            // 设置窗口标题
            setTitle("浏览学生表记录" + " && 当前记录:" + currentRow);
            // 填充窗口各文本框数据
            fillFrameData(currentRow);
        } else {
    
    
            JOptionPane.showMessageDialog(null,
                    "表中没有记录！", "浏览学生表记录", JOptionPane.ERROR_MESSAGE);
            btnTop.setEnabled(false);
            btnPrevious.setEnabled(false);
            btnNext.setEnabled(false);
            btnBottom.setEnabled(false);
        }

        // [第一条]按钮单击事件
        btnTop.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                // 设置当前记录号
                currentRow = 1;
                // 填充当前记录数据
                fillFrameData(currentRow);
            }
        });

        // [上一条]按钮单击事件
        btnPrevious.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                if (currentRow > 1) {
    
    
                    // 设置当前记录号
                    currentRow--;
                    // 填充当前记录数据
                    fillFrameData(currentRow);
                } else {
    
    
                    JOptionPane.showMessageDialog(null,
                            "已到第一条记录！", "浏览学生表记录", JOptionPane.WARNING_MESSAGE);
                }
            }
        });

        // [下一条]按钮单击事件
        btnNext.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                if (currentRow < students.size()) {
    
    
                    // 设置当前记录号
                    currentRow++;
                    // 填充当前记录数据
                    fillFrameData(currentRow);
                } else {
    
    
                    JOptionPane.showMessageDialog(null,
                            "已到最后一条记录！", "浏览学生表记录", JOptionPane.WARNING_MESSAGE);
                }
            }
        });

        // [最后一条]按钮单击事件
        btnBottom.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                // 设置当前记录号
                currentRow = students.size();
                // 填充当前记录数据
                fillFrameData(currentRow);
            }
        });

        // [退出]按钮单击事件
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                dispose();
            }
        });
    }

    /**
     * 将当前记录数据填充窗口各文本框
     *
     * @param currentRow
     */
    private void fillFrameData(int currentRow) {
    
    
        if (currentRow > 0) {
    
    
            setTitle("浏览学生表记录" + " && 当前记录:" + currentRow);
            txtId.setText(students.get(currentRow - 1).getId());
            txtName.setText(students.get(currentRow - 1).getName());
            txtSex.setText(students.get(currentRow - 1).getSex());
            txtAge.setText(students.get(currentRow - 1).getAge() + "");
            txtDepartment.setText(students.get(currentRow - 1).getDepartment());
            txtClass.setText(students.get(currentRow - 1).getClazz());
            txtTelephone.setText(students.get(currentRow - 1).getTelephone());
        }
    }

    public static void main(String[] args) {
    
    
        new BrowseStudentsFrame("");
    }
}

（六）、ChangePasswordFrame

package net.dc.student.gui;

import net.dc.student.app.Application;
import net.dc.student.bean.User;
import net.dc.student.service.UserService;
import net.dc.student.service.impl.UserServiceImpl;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

/**
 * 功能：修改用户密码
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class ChangePasswordFrame extends JFrame {
    
    
    // 面板
    private JPanel panel;
    private JPanel pnlRow1;
    private JPanel pnlRow2;
    private JPanel pnlRow3;
    private JPanel pnlRow4;
    private JPanel pnlRow5;

    // 标签
    private JLabel lblUsername;
    private JLabel lblPassword;
    private JLabel lblNewPassword1;
    private JLabel lblNewPassword2;

    // 文本框
    private JTextField txtUsername;
    private JPasswordField txtPassword;
    private JPasswordField txtNewPassword1;
    private JPasswordField txtNewPassword2;

    // 按钮
    private JButton btnOK;
    private JButton btnCancel;
    // 用户服务对象
    private UserService userService;

    public ChangePasswordFrame(String title) {
    
    
        super(title);
        initGUI();
    }

    private void initGUI() {
    
    
        // 创建组件（面板与组件）
        panel = (JPanel) getContentPane();
        pnlRow1 = new JPanel();
        pnlRow2 = new JPanel();
        pnlRow3 = new JPanel();
        pnlRow4 = new JPanel();
        pnlRow5 = new JPanel();

        lblUsername = new JLabel("用户名:");
        lblPassword = new JLabel("旧密码:");
        lblNewPassword1 = new JLabel("新密码:");
        lblNewPassword2 = new JLabel("确  认:");

        txtUsername = new JTextField(20);
        txtUsername.setEditable(false);
        txtPassword = new JPasswordField(20);
        txtNewPassword1 = new JPasswordField(20);
        txtNewPassword2 = new JPasswordField(20);

        btnOK = new JButton("确定[O]");
        btnOK.setMnemonic(KeyEvent.VK_O);
        btnCancel = new JButton("取消[C]");
        btnCancel.setMnemonic(KeyEvent.VK_C);

        // 设置大面板布局，添加五个小面板
        panel.setLayout(new GridLayout(5, 1));
        panel.add(pnlRow1);
        panel.add(pnlRow2);
        panel.add(pnlRow3);
        panel.add(pnlRow4);
        panel.add(pnlRow5);

        // 将控件添加到五个小面板
        pnlRow1.add(lblUsername);
        pnlRow1.add(txtUsername);
        pnlRow2.add(lblPassword);
        pnlRow2.add(txtPassword);
        pnlRow3.add(lblNewPassword1);
        pnlRow3.add(txtNewPassword1);
        pnlRow4.add(lblNewPassword2);
        pnlRow4.add(lblNewPassword2);
        pnlRow5.add(btnOK);
        pnlRow5.add(btnCancel);

        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口刚好容纳组件
        pack();
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭事件（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 设置控件属性
        txtUsername.setEditable(false);
        txtUsername.setText(Application.username);

        // [取消]按钮单击事件处理
        btnCancel.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                dispose();
            }
        });

        // [确定]按钮单击事件处理
        btnOK.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                changePassword();
            }
        });

        // [确定]按钮按键事件处理
        btnOK.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == 10) {
    
    
                    changePassword();
                }
            }
        });

        // [用户名]文本框按键事件处理
        txtUsername.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtPassword.requestFocus();
                }
            }
        });

        // [密码]文本框按键事件处理
        txtPassword.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtNewPassword1.requestFocus();
                }
            }
        });

        // [新密码1]文本框按键事件处理
        txtNewPassword1.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                txtNewPassword2.requestFocus();
            }
        });

        // [新密码2]文本框按键事件处理
        txtNewPassword2.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    btnOK.requestFocus();
                }
            }
        });
    }

    private void changePassword() {
    
    
        // 获取用户信息
        int id = Application.id;
        String username = Application.username;

        // 保存用户输入的旧密码与两个新密码
        String password = new String(txtPassword.getPassword());
        String newPassword1 = new String(txtNewPassword1.getPassword());
        String newPassword2 = new String(txtNewPassword2.getPassword());

        // 创建学生服务对象
        userService = new UserServiceImpl();

        if (userService.login(username, password) == null) {
    
    
            JOptionPane.showMessageDialog(null,
                    "旧密码错误，请重新输入！", "错误提示", JOptionPane.ERROR_MESSAGE);
            txtPassword.requestFocus();
            txtPassword.selectAll();
        } else if (newPassword1.equals("")) {
    
    
            JOptionPane.showMessageDialog(null,
                    "新密码不能为空！", "错误提示", JOptionPane.ERROR_MESSAGE);
            txtNewPassword1.requestFocus();
        } else if (newPassword2.equals("")) {
    
    
            JOptionPane.showMessageDialog(null,
                    "确认密码不能为空！", "错误提示", JOptionPane.ERROR_MESSAGE);
            txtNewPassword2.requestFocus();
        } else if (!newPassword1.equals(newPassword2)) {
    
    
            JOptionPane.showMessageDialog(null,
                    "两次密码不一致，请重新输入！", "错误提示", JOptionPane.ERROR_MESSAGE);
            txtNewPassword1.setText("");
            txtNewPassword2.setText("");
            txtNewPassword1.requestFocus();
        } else {
    
    
            // 按标识符获取用户
            User user = userService.findUserById(id);
            // 修改用户的密码属性
            user.setPassword(newPassword1);
            // 调用用户服务对象的更新方法，更新用户信息
            int count = userService.updateUser(user);
            if (count > 0) {
    
    
                JOptionPane.showMessageDialog(null,
                        "密码修改成功！", "设置密码", JOptionPane.INFORMATION_MESSAGE);
                dispose();
            } else {
    
    
                JOptionPane.showMessageDialog(null,
                        "密码修改失败！", "设置密码", JOptionPane.WARNING_MESSAGE);
            }
        }
    }

    public static void main(String[] args) {
    
    
        Application.id = 2;
        Application.username = "王霞";
        new ChangePasswordFrame("修改用户密码");
    }
}

（七）、CountStudentsByClassFrame

package net.dc.student.gui;

import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.print.PrinterException;
import java.util.Vector;

/**
 * 功能：按班级统计学生人数
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class CountStudentsByClassFrame extends JFrame {
    
    
    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;

    private JButton btnPrint;
    private JButton btnExit;

    private JScrollPane scroller; // 滚动面板

    private Vector rows; // 记录行集
    private Vector<String> colHead; // 表格列标题
    private JTable table; // 表格
    private StudentService studentService; // 学生服务对象

    public CountStudentsByClassFrame(String title) {
    
    
        super(title);
        initGUI();
    }

    /**
     * 初始化用户界面
     */
    private void initGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        rows = new Vector();
        colHead = new Vector();

        btnPrint = new JButton("打印[P]");
        btnPrint.setMnemonic(KeyEvent.VK_P);
        btnExit = new JButton("退出[X]");
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.add(pnlSouth, BorderLayout.SOUTH);
        panel.add(pnlCenter, BorderLayout.CENTER);

        pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
        pnlSouth.add(btnPrint);
        pnlSouth.add(btnExit);
        pnlCenter.setLayout(new BorderLayout());

        TitledBorder tb = new TitledBorder("统计结果");
        pnlCenter.setBorder(tb);

        // 创建学生服务对象
        studentService = new StudentServiceImpl();
        // 获取按性别统计结果记录行集
        rows = studentService.findRowsByClass();
        // 设置表头
        colHead.add("班级");
        colHead.add("人数");

        // 创建表格（参数1：记录集；参数2：表头）
        table = new JTable(rows, colHead);
        scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        pnlCenter.add(scroller, BorderLayout.CENTER);

        repaint(); // 重绘窗体

        if (rows.isEmpty()) {
    
    
            JOptionPane.showMessageDialog(this, "没有记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
        }

        // 设置窗口大小
        setSize(300, 200);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口标题
        setTitle("按班级统计学生人数");
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 【退出】按钮单击事件
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent arg0) {
    
    
                dispose();
            }
        });

        // 【打印】按钮单击事件
        btnPrint.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                try {
    
    
                    table.print();
                } catch (PrinterException e1) {
    
    
                    e1.printStackTrace();
                }
            }
        });
    }

    public static void main(String[] args) {
    
    
        new CountStudentsByClassFrame("");
    }
}

（八）、CountStudentsByDepartmentFrame

package net.dc.student.gui;

import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.print.PrinterException;
import java.util.Vector;

/**
 * 功能：按系部统计学生人数
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class CountStudentsByDepartmentFrame extends JFrame {
    
    
    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;

    private JButton btnPrint;
    private JButton btnExit;

    private JScrollPane scroller; // 滚动面板

    private Vector rows; // 记录行集
    private Vector<String> colHead; // 表格列标题
    private JTable table; // 表格
    private StudentService studentService; // 学生服务对象

    public CountStudentsByDepartmentFrame(String title) {
    
    
        super(title);
        initGUI();
    }

    /**
     * 初始化用户界面
     */
    private void initGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        rows = new Vector();
        colHead = new Vector();

        btnPrint = new JButton("打印[P]");
        btnPrint.setMnemonic(KeyEvent.VK_P);
        btnExit = new JButton("退出[X]");
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.add(pnlSouth, BorderLayout.SOUTH);
        panel.add(pnlCenter, BorderLayout.CENTER);

        pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
        pnlSouth.add(btnPrint);
        pnlSouth.add(btnExit);
        pnlCenter.setLayout(new BorderLayout());

        TitledBorder tb = new TitledBorder("统计结果");
        pnlCenter.setBorder(tb);

        // 创建学生服务对象
        studentService = new StudentServiceImpl();
        // 获取按性别统计结果记录行集
        rows = studentService.findRowsByDepartment();
        // 设置表头
        colHead.add("系部");
        colHead.add("人数");

        // 创建表格（参数1：记录集；参数2：表头）
        table = new JTable(rows, colHead);
        scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        pnlCenter.add(scroller, BorderLayout.CENTER);

        repaint(); // 重绘窗体

        if (rows.isEmpty()) {
    
    
            JOptionPane.showMessageDialog(this, "没有记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
        }

        // 设置窗口大小
        setSize(300, 200);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口标题
        setTitle("按系部统计学生人数");
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 【退出】按钮单击事件
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent arg0) {
    
    
                dispose();
            }
        });

        // 【打印】按钮单击事件
        btnPrint.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                try {
    
    
                    table.print();
                } catch (PrinterException e1) {
    
    
                    e1.printStackTrace();
                }
            }
        });
    }

    public static void main(String[] args) {
    
    
        new CountStudentsByDepartmentFrame("");
    }
}

（九）、CountStudentsBySexFrame

package net.dc.student.gui;

import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.print.PrinterException;
import java.util.Vector;

/**
 * 功能：按性别统计学生人数
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class CountStudentsBySexFrame extends JFrame {
    
    
    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;

    private JButton btnPrint;
    private JButton btnExit;

    private JScrollPane scroller; // 滚动面板

    private Vector rows; // 记录行集
    private Vector<String> colHead; // 表格列标题
    private JTable table; // 表格
    private StudentService studentService; // 学生服务对象

    public CountStudentsBySexFrame(String title) {
    
    
        super(title);
        initGUI();
    }

    /**
     * 初始化用户界面
     */
    private void initGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        rows = new Vector();
        colHead = new Vector();

        btnPrint = new JButton("打印[P]");
        btnPrint.setMnemonic(KeyEvent.VK_P);
        btnExit = new JButton("退出[X]");
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.add(pnlSouth, BorderLayout.SOUTH);
        panel.add(pnlCenter, BorderLayout.CENTER);

        pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
        pnlSouth.add(btnPrint);
        pnlSouth.add(btnExit);
        pnlCenter.setLayout(new BorderLayout());

        TitledBorder tb = new TitledBorder("统计结果");
        pnlCenter.setBorder(tb);

        // 创建学生服务对象
        studentService = new StudentServiceImpl();
        // 获取按性别统计结果记录行集
        rows = studentService.findRowsBySex();
        // 设置表头
        colHead.add("性别");
        colHead.add("人数");

        // 创建表格（参数1：记录集；参数2：表头）
        table = new JTable(rows, colHead);
        scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        pnlCenter.add(scroller, BorderLayout.CENTER);

        repaint(); // 重绘窗体

        if (rows.isEmpty()) {
    
    
            JOptionPane.showMessageDialog(this, "没有记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
        }

        // 设置窗口大小
        setSize(300, 200);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口标题
        setTitle("按性别统计学生人数");
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 【退出】按钮单击事件
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent arg0) {
    
    
                dispose();
            }
        });

        // 【打印】按钮单击事件
        btnPrint.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                try {
    
    
                    table.print();
                } catch (PrinterException e1) {
    
    
                    e1.printStackTrace();
                }
            }
        });
    }

    public static void main(String[] args) {
    
    
        new CountStudentsBySexFrame("");
    }
}

（十）、DeleteStudentByIdFrame

package net.dc.student.gui;

import net.dc.student.bean.Student;
import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.*;
import java.util.Vector;

import java.util.List;

/**
 * 功能：按学号删除学生记录
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class DeleteStudentByIdFrame extends JFrame {
    
    
    private JLabel lblInputId; // 学号标签
    private JTextField txtId; // 学号文本框

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnDelete;
    private JButton btnExit;

    private JScrollPane scroller; // 滚动面板

    private Vector rows; // 记录行集
    private Vector<String> colHead; // 表格列标题
    private JTable table; // 表格
    private int currentRow; // 当前记录行号
    private List<Student> students; // 学生列表
    private StudentService studentService; // 学生服务对象

    public DeleteStudentByIdFrame(String title) {
    
    
        super(title);
        intiGUI();
    }

    private void intiGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlNorth = new JPanel();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        rows = new Vector();
        colHead = new Vector();

        lblInputId = new JLabel("输入学号：");
        txtId = new JTextField(10);
        txtId.setHorizontalAlignment(JTextField.CENTER);
        btnQuery = new JButton("查询[Q]");
        btnQuery.setMnemonic(KeyEvent.VK_Q);
        btnBrowseAll = new JButton("显示全部记录[A]");
        btnBrowseAll.setMnemonic(KeyEvent.VK_A);
        btnDelete = new JButton("删除查询的记录[D]");
        btnDelete.setEnabled(false);// 删除按钮不可用
        btnDelete.setMnemonic(KeyEvent.VK_D);
        btnExit = new JButton("退出[X]");
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.add(pnlSouth, BorderLayout.SOUTH);
        panel.add(pnlCenter, BorderLayout.CENTER);
        panel.add(pnlNorth, BorderLayout.NORTH);

        pnlNorth.add(lblInputId);
        pnlNorth.add(txtId);
        pnlNorth.add(btnQuery);
        pnlNorth.add(btnBrowseAll);
        pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
        pnlSouth.add(btnDelete);
        pnlSouth.add(btnExit);
        pnlCenter.setLayout(new BorderLayout());

        // 创建标题边框对象
        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        // 创建学生服务对象
        studentService = new StudentServiceImpl();
        // 获取全部学生列表
        students = studentService.findAllStudents();
        // 填充表格数据
        fillTableData();

        // 设置窗口大小
        setSize(600, 350);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口标题
        setTitle("按学号删除学生记录");
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 【退出】按钮单击事件
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                dispose();
            }
        });

        // 【删除】按钮单击事件
        btnDelete.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                if (!rows.isEmpty()) {
    
    
                    long choice = JOptionPane.showConfirmDialog(null, "是否要删除记录？");
                    if (choice == JOptionPane.OK_OPTION) {
    
    
                        // 获取待删学生学号
                        String id = txtId.getText().trim();
                        // 按学号删除学生
                        int count = studentService.deleteStudentById(id);
                        if (count > 0) {
    
    
                            JOptionPane.showMessageDialog(null, "记录删除成功！", "提示", JOptionPane.INFORMATION_MESSAGE);
                            // 重新获取全部学生列表
                            students = studentService.findAllStudents();
                            // 清空待删学生学号文本框
                            txtId.setText("");
                            // 填充数据
                            fillTableData();
                            // 删除按钮不可用
                            btnDelete.setEnabled(false);
                        } else {
    
    
                            JOptionPane.showMessageDialog(null, "记录删除失败！", "警告", JOptionPane.WARNING_MESSAGE);
                        }
                    }
                }
            }
        });

        // 【查询】按钮单击事件
        btnQuery.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                doQuery();
            }
        });

        // 【显示全部记录】按钮单击事件
        btnBrowseAll.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                // 获取全部学生记录
                students = studentService.findAllStudents();
                // 填充表格数据
                fillTableData();
                // 删除按钮不可用
                btnDelete.setEnabled(false);
            }
        });

        // 【学号】文本框按键事件
        txtId.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    doQuery();
                }
            }
        });

        // 表格单击事件
        table.addMouseListener(new MouseAdapter() {
    
    
            public void mouseClicked(MouseEvent e) {
    
    
                // 获取当前行的行数
                int row = table.rowAtPoint(e.getPoint());
                // 选中鼠标单击的行
                table.setRowSelectionInterval(row, row);
                // 设置文本框内容
                txtId.setText(table.getValueAt(row, 0).toString());
            }
        });
    }

    /**
     * 查询方法
     */
    private void doQuery() {
    
    
        // 获取查询学号
        String id = txtId.getText().trim();
        if (!id.equals("")) {
    
    
            students.clear();
            Student student = studentService.findStudentById(id);
            if (student != null) {
    
    
                // 将查询到的学生添加到列表
                students.add(student);
                // 让删除按钮可用
                btnDelete.setEnabled(true);
            }
            // 填充表格
            fillTableData();
        } else {
    
    
            JOptionPane.showMessageDialog(this, "请输入待查学生学号！", "警告", JOptionPane.WARNING_MESSAGE);
            txtId.requestFocus();
        }
    }

    /**
     * 填充表格方法
     */
    private void fillTableData() {
    
    
        // 填充表头
        colHead.clear();
        colHead.add("学号");
        colHead.add("姓名");
        colHead.add("性别");
        colHead.add("年龄");
        colHead.add("系部");
        colHead.add("班级");
        colHead.add("电话");

        // 填充表记录
        rows.clear();
        for (Student student : students) {
    
    
            Vector<String> currentRow = new Vector<String>();
            currentRow.addElement(student.getId());
            currentRow.addElement(student.getName());
            currentRow.addElement(student.getSex());
            currentRow.addElement(student.getAge() + "");
            currentRow.addElement(student.getDepartment());
            currentRow.addElement(student.getClazz());
            currentRow.addElement(student.getTelephone());
            // 将当前行添加到记录行集
            rows.add(currentRow);
        }

        // 创建表格（参数1：记录集；参数2：表头）
        table = new JTable(rows, colHead);

        // 定义滚动面板
        scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        // 将滚动面板添加到中心面板
        pnlCenter.add(scroller, BorderLayout.CENTER);

        // 重绘窗体
        repaint();

        // 判断是否有记录行
        if (rows.isEmpty()) {
    
    
            JOptionPane.showMessageDialog(this, "没有符合条件的记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
            txtId.setText("");
        } else {
    
    
            // 让滚动条移到最上方
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    /**
     * 主方法
     *
     * @param args
     */
    public static void main(String[] args) {
    
    
        new DeleteStudentByIdFrame("");
    }
}

（十一）、DeleteStudentsByClassFrame

package net.dc.student.gui;

import net.dc.student.bean.Student;
import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.*;
import java.util.Vector;

import java.util.List;

/**
 * 功能：按班级删除学生记录
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class DeleteStudentsByClassFrame extends JFrame {
    
    
    private JLabel lblInputId; // 学号标签
    private JTextField txtClass; // 班级文本框

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnDelete;
    private JButton btnExit;

    private JScrollPane scroller; // 滚动面板

    private Vector rows; // 记录行集
    private Vector<String> colHead; // 表格列标题
    private JTable table; // 表格
    private int currentRow; // 当前记录行号
    private List<Student> students; // 学生列表
    private StudentService studentService; // 学生服务对象

    public DeleteStudentsByClassFrame(String title) {
    
    
        super(title);
        intiGUI();
    }

    private void intiGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlNorth = new JPanel();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        rows = new Vector();
        colHead = new Vector();

        lblInputId = new JLabel("输入班级：");
        txtClass = new JTextField(10);
        txtClass.setHorizontalAlignment(JTextField.CENTER);
        btnQuery = new JButton("查询[Q]");
        btnQuery.setMnemonic(KeyEvent.VK_Q);
        btnBrowseAll = new JButton("显示全部记录[A]");
        btnBrowseAll.setMnemonic(KeyEvent.VK_A);
        btnDelete = new JButton("删除查询的记录[D]");
        btnDelete.setEnabled(false);// 删除按钮不可用
        btnDelete.setMnemonic(KeyEvent.VK_D);
        btnExit = new JButton("退出[X]");
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.add(pnlSouth, BorderLayout.SOUTH);
        panel.add(pnlCenter, BorderLayout.CENTER);
        panel.add(pnlNorth, BorderLayout.NORTH);

        pnlNorth.add(lblInputId);
        pnlNorth.add(txtClass);
        pnlNorth.add(btnQuery);
        pnlNorth.add(btnBrowseAll);
        pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
        pnlSouth.add(btnDelete);
        pnlSouth.add(btnExit);
        pnlCenter.setLayout(new BorderLayout());

        // 创建标题边框对象
        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        // 创建学生服务对象
        studentService = new StudentServiceImpl();
        // 获取全部学生列表
        students = studentService.findAllStudents();
        // 填充表格数据
        fillTableData();

        // 设置窗口大小
        setSize(600, 350);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口标题
        setTitle("按班级删除学生记录");
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 【退出】按钮单击事件
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                dispose();
            }
        });

        // 【删除】按钮单击事件
        btnDelete.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                if (!rows.isEmpty()) {
    
    
                    long choice = JOptionPane.showConfirmDialog(null, "是否要删除记录？");
                    if (choice == JOptionPane.OK_OPTION) {
    
    
                        // 获取待删学生班级
                        String stuClass = txtClass.getText().trim();
                        // 按班级删除学生
                        int count = studentService.deleteStudentsByClass(stuClass);
                        if (count > 0) {
    
    
                            JOptionPane.showMessageDialog(null, "记录删除成功！", "提示", JOptionPane.INFORMATION_MESSAGE);
                            // 重新获取全部学生列表
                            students = studentService.findAllStudents();
                            // 清空待删学生学号文本框
                            txtClass.setText("");
                            // 填充数据
                            fillTableData();
                            // 删除按钮不可用
                            btnDelete.setEnabled(false);
                        } else {
    
    
                            JOptionPane.showMessageDialog(null, "记录删除失败！", "警告", JOptionPane.WARNING_MESSAGE);
                        }
                    }
                }
            }
        });

        // 【查询】按钮单击事件
        btnQuery.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                doQuery();
            }
        });

        // 【显示全部记录】按钮单击事件
        btnBrowseAll.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                // 获取全部学生记录
                students = studentService.findAllStudents();
                // 填充表格数据
                fillTableData();
                // 删除按钮不可用
                btnDelete.setEnabled(false);
            }
        });

        // 【学号】文本框按键事件
        txtClass.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    doQuery();
                }
            }
        });

        // 表格单击事件
        table.addMouseListener(new MouseAdapter() {
    
    
            public void mouseClicked(MouseEvent e) {
    
    
                // 获取当前行的行数
                int row = table.rowAtPoint(e.getPoint());
                // 选中鼠标单击的行
                table.setRowSelectionInterval(row, row);
                // 设置文本框内容
                txtClass.setText(table.getValueAt(row, 5).toString());
            }
        });
    }

    /**
     * 查询方法
     */
    private void doQuery() {
    
    
        // 获取查询班级
        String strClass = txtClass.getText().trim();
        if (!strClass.equals("")) {
    
    
            students.clear();
            List<Student> student = studentService.findStudentsByClass(strClass);
            if (students != null) {
    
    
                // 将查询到的学生添加到列表
                students.addAll(student);
                // 让删除按钮可用
                btnDelete.setEnabled(true);
            }
            // 填充表格
            fillTableData();
        } else {
    
    
            JOptionPane.showMessageDialog(this, "请输入待查学生学号！", "警告", JOptionPane.WARNING_MESSAGE);
            txtClass.requestFocus();
        }
    }

    /**
     * 填充表格方法
     */
    private void fillTableData() {
    
    
        // 填充表头
        colHead.clear();
        colHead.add("学号");
        colHead.add("姓名");
        colHead.add("性别");
        colHead.add("年龄");
        colHead.add("系部");
        colHead.add("班级");
        colHead.add("电话");

        // 填充表记录
        rows.clear();
        for (Student student : students) {
    
    
            Vector<String> currentRow = new Vector<String>();
            currentRow.addElement(student.getId());
            currentRow.addElement(student.getName());
            currentRow.addElement(student.getSex());
            currentRow.addElement(student.getAge() + "");
            currentRow.addElement(student.getDepartment());
            currentRow.addElement(student.getClazz());
            currentRow.addElement(student.getTelephone());
            // 将当前行添加到记录行集
            rows.add(currentRow);
        }

        // 创建表格（参数1：记录集；参数2：表头）
        table = new JTable(rows, colHead);

        // 定义滚动面板
        scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        // 将滚动面板添加到中心面板
        pnlCenter.add(scroller, BorderLayout.CENTER);

        // 重绘窗体
        repaint();

        // 判断是否有记录行
        if (rows.isEmpty()) {
    
    
            JOptionPane.showMessageDialog(this, "没有符合条件的记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
            txtClass.setText("");
        } else {
    
    
            // 让滚动条移到最上方
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    /**
     * 主方法
     *
     * @param args
     */
    public static void main(String[] args) {
    
    
        new DeleteStudentsByClassFrame("");
    }
}

（十二）、DeleteStudentsByDepartmentFrame

package net.dc.student.gui;

import net.dc.student.bean.Student;
import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.*;
import java.util.Vector;

import java.util.List;

/**
 * 功能：按系部删除学生记录
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class DeleteStudentsByDepartmentFrame extends JFrame {
    
    
    private JLabel lblInputId; // 学号标签
    private JTextField txtDepartment; // 系部文本框

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnDelete;
    private JButton btnExit;

    private JScrollPane scroller; // 滚动面板

    private Vector rows; // 记录行集
    private Vector<String> colHead; // 表格列标题
    private JTable table; // 表格
    private int currentRow; // 当前记录行号
    private List<Student> students; // 学生列表
    private StudentService studentService; // 学生服务对象

    public DeleteStudentsByDepartmentFrame(String title) {
    
    
        super(title);
        intiGUI();
    }

    private void intiGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlNorth = new JPanel();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        rows = new Vector();
        colHead = new Vector();

        lblInputId = new JLabel("输入班级：");
        txtDepartment = new JTextField(10);
        txtDepartment.setHorizontalAlignment(JTextField.CENTER);
        btnQuery = new JButton("查询[Q]");
        btnQuery.setMnemonic(KeyEvent.VK_Q);
        btnBrowseAll = new JButton("显示全部记录[A]");
        btnBrowseAll.setMnemonic(KeyEvent.VK_A);
        btnDelete = new JButton("删除查询的记录[D]");
        btnDelete.setEnabled(false);// 删除按钮不可用
        btnDelete.setMnemonic(KeyEvent.VK_D);
        btnExit = new JButton("退出[X]");
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.add(pnlSouth, BorderLayout.SOUTH);
        panel.add(pnlCenter, BorderLayout.CENTER);
        panel.add(pnlNorth, BorderLayout.NORTH);

        pnlNorth.add(lblInputId);
        pnlNorth.add(txtDepartment);
        pnlNorth.add(btnQuery);
        pnlNorth.add(btnBrowseAll);
        pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
        pnlSouth.add(btnDelete);
        pnlSouth.add(btnExit);
        pnlCenter.setLayout(new BorderLayout());

        // 创建标题边框对象
        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        // 创建学生服务对象
        studentService = new StudentServiceImpl();
        // 获取全部学生列表
        students = studentService.findAllStudents();
        // 填充表格数据
        fillTableData();

        // 设置窗口大小
        setSize(600, 350);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口标题
        setTitle("按班级删除学生记录");
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 【退出】按钮单击事件
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                dispose();
            }
        });

        // 【删除】按钮单击事件
        btnDelete.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                if (!rows.isEmpty()) {
    
    
                    long choice = JOptionPane.showConfirmDialog(null, "是否要删除记录？");
                    if (choice == JOptionPane.OK_OPTION) {
    
    
                        // 获取待删学生系部
                        String stuDepartment = txtDepartment.getText().trim();
                        // 按学号删除学生
                        int count = studentService.deleteStudentsByDepartment(stuDepartment);
                        if (count > 0) {
    
    
                            JOptionPane.showMessageDialog(null, "记录删除成功！", "提示", JOptionPane.INFORMATION_MESSAGE);
                            // 重新获取全部学生列表
                            students = studentService.findAllStudents();
                            // 清空待删学生学号文本框
                            txtDepartment.setText("");
                            // 填充数据
                            fillTableData();
                            // 删除按钮不可用
                            btnDelete.setEnabled(false);
                        } else {
    
    
                            JOptionPane.showMessageDialog(null, "记录删除失败！", "警告", JOptionPane.WARNING_MESSAGE);
                        }
                    }
                }
            }
        });

        // 【查询】按钮单击事件
        btnQuery.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                doQuery();
            }
        });

        // 【显示全部记录】按钮单击事件
        btnBrowseAll.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                // 获取全部学生记录
                students = studentService.findAllStudents();
                // 填充表格数据
                fillTableData();
                // 删除按钮不可用
                btnDelete.setEnabled(false);
            }
        });

        // 【学号】文本框按键事件
        txtDepartment.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    doQuery();
                }
            }
        });

        // 表格单击事件
        table.addMouseListener(new MouseAdapter() {
    
    
            public void mouseClicked(MouseEvent e) {
    
    
                // 获取当前行的行数
                int row = table.rowAtPoint(e.getPoint());
                // 选中鼠标单击的行
                table.setRowSelectionInterval(row, row);
                // 设置文本框内容
                txtDepartment.setText(table.getValueAt(row, 4).toString());
            }
        });
    }

    /**
     * 查询方法
     */
    private void doQuery() {
    
    
        // 获取查询系部
        String strDepartment = txtDepartment.getText().trim();
        if (!strDepartment.equals("")) {
    
    
            students.clear();
            List<Student> student = studentService.findStudentsByDepartment(strDepartment);
            if (student != null) {
    
    
                // 将查询到的学生添加到列表
                students.addAll(student);
                // 让删除按钮可用
                btnDelete.setEnabled(true);
            }
            // 填充表格
            fillTableData();
        } else {
    
    
            JOptionPane.showMessageDialog(this, "请输入待查学生学号！", "警告", JOptionPane.WARNING_MESSAGE);
            txtDepartment.requestFocus();
        }
    }

    /**
     * 填充表格方法
     */
    private void fillTableData() {
    
    
        // 填充表头
        colHead.clear();
        colHead.add("学号");
        colHead.add("姓名");
        colHead.add("性别");
        colHead.add("年龄");
        colHead.add("系部");
        colHead.add("班级");
        colHead.add("电话");

        // 填充表记录
        rows.clear();
        for (Student student : students) {
    
    
            Vector<String> currentRow = new Vector<String>();
            currentRow.addElement(student.getId());
            currentRow.addElement(student.getName());
            currentRow.addElement(student.getSex());
            currentRow.addElement(student.getAge() + "");
            currentRow.addElement(student.getDepartment());
            currentRow.addElement(student.getClazz());
            currentRow.addElement(student.getTelephone());
            // 将当前行添加到记录行集
            rows.add(currentRow);
        }

        // 创建表格（参数1：记录集；参数2：表头）
        table = new JTable(rows, colHead);

        // 定义滚动面板
        scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        // 将滚动面板添加到中心面板
        pnlCenter.add(scroller, BorderLayout.CENTER);

        // 重绘窗体
        repaint();

        // 判断是否有记录行
        if (rows.isEmpty()) {
    
    
            JOptionPane.showMessageDialog(this, "没有符合条件的记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
            txtDepartment.setText("");
        } else {
    
    
            // 让滚动条移到最上方
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    /**
     * 主方法
     *
     * @param args
     */
    public static void main(String[] args) {
    
    
        new DeleteStudentsByDepartmentFrame("");
    }
}

（十三）、EditStudentFrame

package net.dc.student.gui;

import net.dc.student.bean.Student;
import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import java.util.List;

/**
 * 功能：编辑学生记录
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class EditStudentFrame extends JFrame {
    
    
    private JPanel panel;
    private JPanel pnlCenter;
    private JPanel pnlRow1;
    private JPanel pnlRow2;
    private JPanel pnlRow3;
    private JPanel pnlRow4;
    private JPanel pnlRow5;
    private JPanel pnlRow6;
    private JPanel pnlRow7;
    private JPanel pnlSouth;
    private JPanel pnlSouth1;
    private JPanel pnlSouth2;

    private JLabel lblId;
    private JLabel lblName;
    private JLabel lblSex;
    private JLabel lblAge;
    private JLabel lblDepartment;
    private JLabel lblClass;
    private JLabel lblTelephone;

    private JTextField txtId;
    private JTextField txtName;
    private JTextField txtSex;
    private JTextField txtAge;
    private JTextField txtDepartment;
    private JTextField txtClass;
    private JTextField txtTelephone;

    private JButton btnTop;
    private JButton btnPrevious;
    private JButton btnNext;
    private JButton btnBottom;
    private JButton btnExit;
    private JButton btnEdit;
    private JButton btnOK;
    private JButton btnCancel;

    private int currentRow; // 当前记录行号
    private List<Student> students; // 学生列表
    StudentService studentService; // 创建学生服务对象

    public EditStudentFrame(String title) {
    
    
        super(title);
        initGUI();
    }

    /**
     * 初始化用户界面
     */
    private void initGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();
        pnlSouth.setLayout(new GridLayout(2, 1));

        pnlRow1 = new JPanel();
        pnlRow2 = new JPanel();
        pnlRow3 = new JPanel();
        pnlRow4 = new JPanel();
        pnlRow5 = new JPanel();
        pnlRow6 = new JPanel();
        pnlRow7 = new JPanel();
        pnlSouth1 = new JPanel();
        pnlSouth2 = new JPanel();

        pnlRow1.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow2.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow3.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow4.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow5.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow6.setLayout(new FlowLayout(FlowLayout.LEFT));
        pnlRow7.setLayout(new FlowLayout(FlowLayout.LEFT));

        lblId = new JLabel("学号：");
        lblName = new JLabel("姓名：");
        lblSex = new JLabel("性别：");
        lblAge = new JLabel("年龄：");
        lblDepartment = new JLabel("系部：");
        lblClass = new JLabel("班级：");
        lblTelephone = new JLabel("电话：");

        txtId = new JTextField(40);
        txtName = new JTextField(40);
        txtSex = new JTextField(40);
        txtAge = new JTextField(40);
        txtDepartment = new JTextField(40);
        txtClass = new JTextField(40);
        txtTelephone = new JTextField(40);
        txtId.setEditable(false);
        txtName.setEditable(false);
        txtSex.setEditable(false);
        txtAge.setEditable(false);
        txtDepartment.setEditable(false);
        txtClass.setEditable(false);
        txtTelephone.setEditable(false);

        btnTop = new JButton("第一条[T]");
        btnPrevious = new JButton("上一条[P]");
        btnNext = new JButton("下一条[N]");
        btnBottom = new JButton("最后一条[B]");
        btnExit = new JButton("退出[X]");
        btnEdit = new JButton("编辑[E]");
        btnOK = new JButton("确定[O]");
        btnCancel = new JButton("取消[C]");
        btnOK.setEnabled(false);
        btnCancel.setEnabled(false);
        btnTop.setMnemonic(KeyEvent.VK_T);
        btnPrevious.setMnemonic(KeyEvent.VK_P);
        btnNext.setMnemonic(KeyEvent.VK_N);
        btnBottom.setMnemonic(KeyEvent.VK_B);
        btnExit.setMnemonic(KeyEvent.VK_X);
        btnEdit.setMnemonic(KeyEvent.VK_E);
        btnOK.setMnemonic(KeyEvent.VK_O);
        btnCancel.setMnemonic(KeyEvent.VK_C);

        // 添加组件
        panel.setLayout(new BorderLayout());
        panel.add(pnlCenter, BorderLayout.CENTER);
        panel.add(pnlSouth, BorderLayout.SOUTH);
        pnlCenter.setLayout(new GridLayout(7, 1));

        pnlCenter.add(pnlRow1);
        pnlCenter.add(pnlRow2);
        pnlCenter.add(pnlRow3);
        pnlCenter.add(pnlRow4);
        pnlCenter.add(pnlRow5);
        pnlCenter.add(pnlRow6);
        pnlCenter.add(pnlRow7);

        pnlRow1.add(lblId);
        pnlRow1.add(txtId);
        pnlRow2.add(lblName);
        pnlRow2.add(txtName);
        pnlRow3.add(lblSex);
        pnlRow3.add(txtSex);
        pnlRow4.add(lblAge);
        pnlRow4.add(txtAge);
        pnlRow5.add(lblDepartment);
        pnlRow5.add(txtDepartment);
        pnlRow6.add(lblClass);
        pnlRow6.add(txtClass);
        pnlRow7.add(lblTelephone);
        pnlRow7.add(txtTelephone);

        pnlSouth.add(pnlSouth1);
        pnlSouth.add(pnlSouth2);
        pnlSouth1.add(btnTop);
        pnlSouth1.add(btnPrevious);
        pnlSouth1.add(btnNext);
        pnlSouth1.add(btnBottom);
        pnlSouth1.add(btnExit);
        pnlSouth2.add(btnEdit);
        pnlSouth2.add(btnOK);
        pnlSouth2.add(btnCancel);

        // 设置窗口属性
        setSize(500, 300);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口刚好容纳组件
        pack();
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 创建学生服务对象
        studentService = new StudentServiceImpl();
        // 获取全部学生列表
        students = studentService.findAllStudents();
        // 判断是否有学生记录
        if (students.size() > 0) {
    
    
            // 设置当前记录号
            currentRow = 1;
            // 设置窗口标题
            setTitle("浏览学生表记录" + " && 当前记录：" + currentRow);
            // 填充窗口各文本框数据
            fillFrameData(currentRow);
        } else {
    
    
            JOptionPane.showMessageDialog(null, "表中没有记录！", "浏览学生表记录", JOptionPane.ERROR_MESSAGE);
            btnTop.setEnabled(false);
            btnPrevious.setEnabled(false);
            btnNext.setEnabled(false);
            btnBottom.setEnabled(false);
        }

        // 【第一条】按钮单击事件
        btnTop.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                // 设置当前记录号
                currentRow = 1;
                // 填充当前记录数据
                fillFrameData(currentRow);
            }
        });

        // 【上一条】按钮单击事件
        btnPrevious.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                if (currentRow > 1) {
    
    
                    // 设置当前记录号
                    currentRow--;
                    // 填充当前记录数据
                    fillFrameData(currentRow);
                } else {
    
    
                    JOptionPane.showMessageDialog(null, "已到第一条记录！", "浏览学生表记录", JOptionPane.WARNING_MESSAGE);
                }
            }
        });

        // 【下一条】按钮单击事件
        btnNext.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                if (currentRow < students.size() - 1) {
    
    
                    // 设置当前记录号
                    currentRow++;
                    // 填充当前记录数据
                    fillFrameData(currentRow);
                } else {
    
    
                    JOptionPane.showMessageDialog(null, "已到最后一条记录！", "浏览学生表记录", JOptionPane.WARNING_MESSAGE);
                }
            }
        });

        // 【最后一条】按钮单击事件
        btnBottom.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                // 设置当前记录号
                currentRow = students.size() - 1;
                // 填充当前记录数据
                fillFrameData(currentRow);
            }
        });

        // 【退出】按钮单击事件
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                dispose();
            }
        });

        // 【编辑】按钮单击事件
        btnEdit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                // 设置窗口标题
                setTitle("编辑学生表记录" + " && 当前记录：" + currentRow);

                txtName.setEditable(true);
                txtSex.setEditable(true);
                txtAge.setEditable(true);
                txtDepartment.setEditable(true);
                txtClass.setEditable(true);
                txtTelephone.setEditable(true);
                btnOK.setEnabled(true);
                btnCancel.setEnabled(true);
            }
        });

        // 【确定】按钮单击事件
        btnOK.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                // 获取当前学生实体
                Student student = students.get(currentRow);

                if (isNumber(txtAge.getText())) {
    
    
                    if (isLegalTelephone(txtTelephone.getText())) {
    
    
                        // 修改学生实体属性
                        student.setName(txtName.getText());
                        student.setSex(txtSex.getText());
                        student.setAge(Integer.parseInt(txtAge.getText()));
                        student.setDepartment(txtDepartment.getText());
                        student.setClazz(txtClass.getText());
                        student.setTelephone(txtTelephone.getText());
                        // 更新学生信息
                        int count = studentService.updateStudent(student);
                        // 判断是否更新成功
                        if (count > 0) {
    
    
                            JOptionPane.showMessageDialog(null, "更新记录成功！", "编辑学生记录", JOptionPane.INFORMATION_MESSAGE);
                            btnOK.setEnabled(false);
                            btnCancel.setEnabled(false);
                            btnEdit.setEnabled(true);
                            txtName.setEditable(false);
                            txtSex.setEditable(false);
                            txtAge.setEditable(false);
                            txtDepartment.setEditable(false);
                            txtClass.setEditable(false);
                            txtTelephone.setEditable(false);
                            // 重新获取全部学生列表
                            students = studentService.findAllStudents();
                            // 设置窗口标题
                            setTitle("浏览学生表记录" + " && 当前记录：" + currentRow);
                        } else {
    
    
                            JOptionPane.showMessageDialog(null, "更新记录失败！", "编辑学生记录", JOptionPane.ERROR_MESSAGE);
                        }
                    } else {
    
    
                        JOptionPane.showMessageDialog(null, "非法手机号！", "编辑学生记录", JOptionPane.ERROR_MESSAGE);
                        txtTelephone.selectAll();
                        txtTelephone.requestFocus();
                    }
                } else {
    
    
                    JOptionPane.showMessageDialog(null, "年龄必须是数字！", "编辑学生记录", JOptionPane.ERROR_MESSAGE);
                    txtAge.selectAll();
                    txtAge.requestFocus();
                }
            }
        });

        // 【取消】按钮单击事件
        btnCancel.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                btnOK.setEnabled(false);
                btnCancel.setEnabled(false);
                btnEdit.setEnabled(true);
                txtName.setEditable(false);
                txtSex.setEditable(false);
                txtAge.setEditable(false);
                txtDepartment.setEditable(false);
                txtClass.setEditable(false);
                txtTelephone.setEditable(false);
                // 恢复文本框修改前的值
                txtName.setText(students.get(currentRow).getName());
                txtSex.setText(students.get(currentRow).getSex());
                txtAge.setText(students.get(currentRow).getAge() + "");
                txtDepartment.setText(students.get(currentRow).getDepartment());
                txtClass.setText(students.get(currentRow).getClazz());
                txtTelephone.setText(students.get(currentRow).getTelephone());
            }
        });

        // 【学号】文本框按键事件
        txtId.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtName.requestFocus();
                }
            }
        });

        // 【姓名】文本框按键事件
        txtName.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtSex.requestFocus();
                }
            }
        });

        // 【性别】文本框按键事件
        txtSex.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtAge.requestFocus();
                }
            }
        });

        // 【年龄】文本框按键事件
        txtAge.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtDepartment.requestFocus();
                }
            }
        });

        // 【系部】文本框按键事件
        txtDepartment.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtClass.requestFocus();
                }
            }
        });

        // 【班级】文本框按键事件
        txtClass.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    txtTelephone.requestFocus();
                }
            }
        });
    }

    /**
     * 将当前记录数据填充窗口各文本框
     *
     * @param currentRow
     */
    private void fillFrameData(int currentRow) {
    
    
        if (currentRow > 0) {
    
    
            setTitle("浏览学生表记录" + " && 当前记录：" + currentRow);
            txtId.setText(students.get(currentRow).getId());
            txtName.setText(students.get(currentRow).getName());
            txtSex.setText(students.get(currentRow).getSex());
            txtAge.setText(students.get(currentRow).getAge() + "");
            txtDepartment.setText(students.get(currentRow).getDepartment());
            txtClass.setText(students.get(currentRow).getClazz());
            txtTelephone.setText(students.get(currentRow).getTelephone());
        }
    }

    // 判断一个字符串是否全是数字
    private boolean isNumber(String str) {
    
    
        for (int i = 0; i < str.length(); i++) {
    
    
            if (str.charAt(i) < '0' || str.charAt(i) > '9') {
    
    
                return false;
            }
        }
        return true;
    }

    /**
     * 判断是否合法手机号
     *
     * @param telephone
     * @return
     */
    private boolean isLegalTelephone(String telephone) {
    
    
        Pattern p = Pattern.compile("^((13[0-9])|(15[^4,\\D])|(18[0-9]))\\d{8}$");
        Matcher m = p.matcher(telephone);
        return m.matches();
    }

    /**
     * 主方法
     *
     * @param args
     */
    public static void main(String[] args) {
    
    
        new EditStudentFrame("");
    }
}

（十四）、FindStudentByIdFrame

package net.dc.student.gui;

import net.dc.student.bean.Student;
import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.*;
import java.awt.print.PrinterException;
import java.util.Vector;
import java.util.List;

/**
 * 功能：按学号查询学生记录
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class FindStudentByIdFrame extends JFrame {
    
    
    private JLabel lblInputId; // 学号标签
    private JTextField txtId; // 学号文本框

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnPrint;
    private JButton btnExit;

    private JScrollPane scroller;  // 滚动面板

    private Vector rows; // 记录行集
    private Vector<String> colHead; // 表格列标题
    private JTable table; // 表格
    private List<Student> students; // 学生列表
    private StudentService studentService; // 学生服务对象

    public FindStudentByIdFrame(String title) {
    
    
        super(title);
        intiGUI();
    }

    /**
     * 初始化用户界面
     */
    private void intiGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlNorth = new JPanel();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        rows = new Vector();
        colHead = new Vector();

        lblInputId = new JLabel("输入学号：");
        txtId = new JTextField(10);
        txtId.setHorizontalAlignment(JTextField.CENTER);
        btnQuery = new JButton("查询[Q]");
        btnQuery.setMnemonic(KeyEvent.VK_Q);
        btnBrowseAll = new JButton("显示全部记录[A]");
        btnBrowseAll.setMnemonic(KeyEvent.VK_A);
        btnPrint = new JButton("打印[P]");
        btnPrint.setMnemonic(KeyEvent.VK_D);
        btnExit = new JButton("退出[X]");
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.add(pnlSouth, BorderLayout.SOUTH);
        panel.add(pnlCenter, BorderLayout.CENTER);
        panel.add(pnlNorth, BorderLayout.NORTH);

        pnlNorth.add(lblInputId);
        pnlNorth.add(txtId);
        pnlNorth.add(btnQuery);
        pnlNorth.add(btnBrowseAll);
        pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
        pnlSouth.add(btnPrint);
        pnlSouth.add(btnExit);
        pnlCenter.setLayout(new BorderLayout());

        // 创建标题边框对象
        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        // 创建学生服务对象
        studentService = new StudentServiceImpl();
        // 获取全部学生列表
        students = studentService.findAllStudents();
        // 填充表格数据
        fillTableData();

        // 设置窗口大小
        setSize(600, 350);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口标题
        setTitle("按学号查询学生记录");
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 【退出】按钮单击事件
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                dispose();
            }
        });

        // 【打印】按钮单击事件
        btnPrint.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                try {
    
    
                    table.print();
                } catch (PrinterException e1) {
    
    
                    e1.printStackTrace();
                }
            }
        });

        // 【查询】按钮单击事件
        btnQuery.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                doQuery();
            }
        });

        // 【显示全部记录】按钮单击事件
        btnBrowseAll.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                // 获取全部学生记录
                students = studentService.findAllStudents();
                // 填充表格数据
                fillTableData();
                // 删除按钮不可用
                btnPrint.setEnabled(false);
            }
        });

        // 【学号】文本框按键事件
        txtId.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    doQuery();
                }
            }
        });

        // 表格单击事件
        table.addMouseListener(new MouseAdapter() {
    
    
            public void mouseClicked(MouseEvent e) {
    
    
                // 获取当前行的行数
                int row = table.rowAtPoint(e.getPoint());
                // 选中鼠标单击的行
                table.setRowSelectionInterval(row, row);
                // 设置文本框内容
                txtId.setText(table.getValueAt(row, 0).toString());
            }
        });
    }

    /**
     * 查询方法
     */
    private void doQuery() {
    
    
        // 获取查询学号
        String id = txtId.getText().trim();
        if (!id.equals("")) {
    
    
            students.clear();
            Student student = studentService.findStudentById(id);
            if (student != null) {
    
    
                // 将查询到的学生添加到列表
                students.add(student);
            }
            // 填充表格
            fillTableData();
        } else {
    
    
            JOptionPane.showMessageDialog(this, "请输入待查学生学号！", "警告", JOptionPane.WARNING_MESSAGE);
            txtId.requestFocus();
        }
    }

    /**
     * 填充表格方法
     */
    private void fillTableData() {
    
    
        // 填充表头
        colHead.clear();
        colHead.add("学号");
        colHead.add("姓名");
        colHead.add("性别");
        colHead.add("年龄");
        colHead.add("系部");
        colHead.add("班级");
        colHead.add("电话");

        // 填充表记录
        rows.clear();
        for (Student student : students) {
    
    
            Vector<String> currentRow = new Vector<String>();
            currentRow.addElement(student.getId());
            currentRow.addElement(student.getName());
            currentRow.addElement(student.getSex());
            currentRow.addElement(student.getAge() + "");
            currentRow.addElement(student.getDepartment());
            currentRow.addElement(student.getClazz());
            currentRow.addElement(student.getTelephone());
            // 将当前行添加到记录行集
            rows.add(currentRow);
        }

        // 创建表格（参数1：记录集；参数2：表头）
        table = new JTable(rows, colHead);

        // 定义滚动面板
        scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        // 将滚动面板添加到中心面板
        pnlCenter.add(scroller, BorderLayout.CENTER);

        // 重绘窗体
        repaint();

        // 判断是否有记录行
        if (rows.isEmpty()) {
    
    
            JOptionPane.showMessageDialog(this, "没有符合条件的记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
            txtId.setText("");
        } else {
    
    
            // 让滚动条移到最上方
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    public static void main(String[] args) {
    
    
        new FindStudentByIdFrame("");
    }
}

（十五）、FindStudentsByClassFrame

package net.dc.student.gui;

import net.dc.student.bean.Student;
import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.*;
import java.awt.print.PrinterException;
import java.util.Vector;
import java.util.List;

/**
 * 功能：按班级查询学生记录
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class FindStudentsByClassFrame extends JFrame {
    
    
    private JLabel lblInputId; // 学号标签
    private JTextField txtClass; // 班级文本框

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnPrint;
    private JButton btnExit;

    private JScrollPane scroller;  // 滚动面板

    private Vector rows; // 记录行集
    private Vector<String> colHead; // 表格列标题
    private JTable table; // 表格
    private List<Student> listStudents; // 学生列表
    private StudentService studentService; // 学生服务对象

    public FindStudentsByClassFrame(String title) {
    
    
        super(title);
        intiGUI();
    }

    /**
     * 初始化用户界面
     */
    private void intiGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlNorth = new JPanel();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        rows = new Vector();
        colHead = new Vector();

        lblInputId = new JLabel("输入班级：");
        txtClass = new JTextField(10);
        txtClass.setHorizontalAlignment(JTextField.CENTER);
        btnQuery = new JButton("查询[Q]");
        btnQuery.setMnemonic(KeyEvent.VK_Q);
        btnBrowseAll = new JButton("显示全部记录[A]");
        btnBrowseAll.setMnemonic(KeyEvent.VK_A);
        btnPrint = new JButton("打印[P]");
        btnPrint.setMnemonic(KeyEvent.VK_D);
        btnExit = new JButton("退出[X]");
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.add(pnlSouth, BorderLayout.SOUTH);
        panel.add(pnlCenter, BorderLayout.CENTER);
        panel.add(pnlNorth, BorderLayout.NORTH);

        pnlNorth.add(lblInputId);
        pnlNorth.add(txtClass);
        pnlNorth.add(btnQuery);
        pnlNorth.add(btnBrowseAll);
        pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
        pnlSouth.add(btnPrint);
        pnlSouth.add(btnExit);
        pnlCenter.setLayout(new BorderLayout());

        // 创建标题边框对象
        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        // 创建学生服务对象
        studentService = new StudentServiceImpl();
        // 获取全部学生列表
        listStudents = studentService.findAllStudents();
        // 填充表格数据
        fillTableData();

        // 设置窗口大小
        setSize(600, 350);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口标题
        setTitle("按班级查询学生记录");
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 【退出】按钮单击事件
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                dispose();
            }
        });

        // 【打印】按钮单击事件
        btnPrint.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                try {
    
    
                    table.print();
                } catch (PrinterException e1) {
    
    
                    e1.printStackTrace();
                }
            }
        });

        // 【查询】按钮单击事件
        btnQuery.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                doQuery();
            }
        });

        // 【显示全部记录】按钮单击事件
        btnBrowseAll.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                // 获取全部学生记录
                listStudents = studentService.findAllStudents();
                // 填充表格数据
                fillTableData();
                // 删除按钮不可用
                btnPrint.setEnabled(false);
            }
        });

        // 【学号】文本框按键事件
        txtClass.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    doQuery();
                }
            }
        });

        // 表格单击事件
        table.addMouseListener(new MouseAdapter() {
    
    
            public void mouseClicked(MouseEvent e) {
    
    
                // 获取当前行的行数
                int row = table.rowAtPoint(e.getPoint());
                // 选中鼠标单击的行
                table.setRowSelectionInterval(row, row);
                // 设置文本框内容
                txtClass.setText(table.getValueAt(row, 5).toString());
            }
        });
    }

    /**
     * 查询方法
     */
    private void doQuery() {
    
    
        // 获取查询班级
        String strClass = txtClass.getText().trim();
        if (!strClass.equals("")) {
    
    
            listStudents.clear();
            List<Student> studentList = studentService.findStudentsByClass(strClass);
            for (Student student : studentList) {
    
    
                if (student != null) {
    
    
                    // 将查询到的学生添加到列表
                    listStudents.add(student);
                }
            }
            // 填充表格
            fillTableData();
        } else {
    
    
            JOptionPane.showMessageDialog(this, "请输入待查学生班级！", "警告", JOptionPane.WARNING_MESSAGE);
            txtClass.requestFocus();
        }
    }

    /**
     * 填充表格方法
     */
    private void fillTableData() {
    
    
        // 填充表头
        colHead.clear();
        colHead.add("学号");
        colHead.add("姓名");
        colHead.add("性别");
        colHead.add("年龄");
        colHead.add("系部");
        colHead.add("班级");
        colHead.add("电话");

        // 填充表记录
        rows.clear();
        for (Student student :listStudents) {
    
    
            Vector<String> currentRow = new Vector<String>();
            currentRow.addElement(student.getId());
            currentRow.addElement(student.getName());
            currentRow.addElement(student.getSex());
            currentRow.addElement(student.getAge() + "");
            currentRow.addElement(student.getDepartment());
            currentRow.addElement(student.getClazz());
            currentRow.addElement(student.getTelephone());
            // 将当前行添加到记录行集
            rows.add(currentRow);
        }

        // 创建表格（参数1：记录集；参数2：表头）
        table = new JTable(rows, colHead);

        // 定义滚动面板
        scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        // 将滚动面板添加到中心面板
        pnlCenter.add(scroller, BorderLayout.CENTER);

        // 重绘窗体
        repaint();

        // 判断是否有记录行
        if (rows.isEmpty()) {
    
    
            JOptionPane.showMessageDialog(this, "没有符合条件的记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
            txtClass.setText("");
        } else {
    
    
            // 让滚动条移到最上方
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    public static void main(String[] args) {
    
    
        new FindStudentsByClassFrame("");
    }
}

（十六）、FindStudentsByDepartmentFrame

package net.dc.student.gui;

import net.dc.student.bean.Student;
import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.*;
import java.awt.print.PrinterException;
import java.util.Vector;
import java.util.List;

/**
 * 功能：按系部查询学生记录
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class FindStudentsByDepartmentFrame extends JFrame {
    
    
    private JLabel lblInputId; // 学号标签
    private JTextField txtDepartment; // 系部文本框

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnPrint;
    private JButton btnExit;

    private JScrollPane scroller;  // 滚动面板

    private Vector rows; // 记录行集
    private Vector<String> colHead; // 表格列标题
    private JTable table; // 表格
    private List<Student> students; // 学生列表
    private StudentService studentService; // 学生服务对象

    public FindStudentsByDepartmentFrame(String title) {
    
    
        super(title);
        intiGUI();
    }

    /**
     * 初始化用户界面
     */
    private void intiGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlNorth = new JPanel();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        rows = new Vector();
        colHead = new Vector();

        lblInputId = new JLabel("输入系部：");
        txtDepartment = new JTextField(10);
        txtDepartment.setHorizontalAlignment(JTextField.CENTER);
        btnQuery = new JButton("查询[Q]");
        btnQuery.setMnemonic(KeyEvent.VK_Q);
        btnBrowseAll = new JButton("显示全部记录[A]");
        btnBrowseAll.setMnemonic(KeyEvent.VK_A);
        btnPrint = new JButton("打印[P]");
        btnPrint.setMnemonic(KeyEvent.VK_D);
        btnExit = new JButton("退出[X]");
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.add(pnlSouth, BorderLayout.SOUTH);
        panel.add(pnlCenter, BorderLayout.CENTER);
        panel.add(pnlNorth, BorderLayout.NORTH);

        pnlNorth.add(lblInputId);
        pnlNorth.add(txtDepartment);
        pnlNorth.add(btnQuery);
        pnlNorth.add(btnBrowseAll);
        pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
        pnlSouth.add(btnPrint);
        pnlSouth.add(btnExit);
        pnlCenter.setLayout(new BorderLayout());

        // 创建标题边框对象
        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        // 创建学生服务对象
        studentService = new StudentServiceImpl();
        // 获取全部学生列表
        students = studentService.findAllStudents();
        // 填充表格数据
        fillTableData();

        // 设置窗口大小
        setSize(600, 350);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口标题
        setTitle("按系部查询学生记录");
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 【退出】按钮单击事件
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                dispose();
            }
        });

        // 【打印】按钮单击事件
        btnPrint.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                try {
    
    
                    table.print();
                } catch (PrinterException e1) {
    
    
                    e1.printStackTrace();
                }
            }
        });

        // 【查询】按钮单击事件
        btnQuery.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                doQuery();
            }
        });

        // 【显示全部记录】按钮单击事件
        btnBrowseAll.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                // 获取全部学生记录
                students = studentService.findAllStudents();
                // 填充表格数据
                fillTableData();
                // 删除按钮不可用
                btnPrint.setEnabled(false);
            }
        });

        // 【学号】文本框按键事件
        txtDepartment.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    doQuery();
                }
            }
        });

        // 表格单击事件
        table.addMouseListener(new MouseAdapter() {
    
    
            public void mouseClicked(MouseEvent e) {
    
    
                // 获取当前行的行数
                int row = table.rowAtPoint(e.getPoint());
                // 选中鼠标单击的行
                table.setRowSelectionInterval(row, row);
                // 设置文本框内容
                txtDepartment.setText(table.getValueAt(row, 4).toString());
            }
        });
    }

    /**
     * 查询方法
     */
    private void doQuery() {
    
    
        // 获取查询系部
        String department = txtDepartment.getText().trim();
        if (!department.equals("")) {
    
    
            students.clear();
            List<Student> stuList = studentService.findStudentsByDepartment(department);
            students.addAll(stuList);
            // 填充表格
            fillTableData();
        } else {
    
    
            JOptionPane.showMessageDialog(this, "请输入待查学生系部！", "警告", JOptionPane.WARNING_MESSAGE);
            txtDepartment.requestFocus();
        }
    }

    /**
     * 填充表格方法
     */
    private void fillTableData() {
    
    
        // 填充表头
        colHead.clear();
        colHead.add("学号");
        colHead.add("姓名");
        colHead.add("性别");
        colHead.add("年龄");
        colHead.add("系部");
        colHead.add("班级");
        colHead.add("电话");

        // 填充表记录
        rows.clear();
        for (Student student : students) {
    
    
            Vector<String> currentRow = new Vector<String>();
            currentRow.addElement(student.getId());
            currentRow.addElement(student.getName());
            currentRow.addElement(student.getSex());
            currentRow.addElement(student.getAge() + "");
            currentRow.addElement(student.getDepartment());
            currentRow.addElement(student.getClazz());
            currentRow.addElement(student.getTelephone());
            // 将当前行添加到记录行集
            rows.add(currentRow);
        }

        // 创建表格（参数1：记录集；参数2：表头）
        table = new JTable(rows, colHead);

        // 定义滚动面板
        scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        // 将滚动面板添加到中心面板
        pnlCenter.add(scroller, BorderLayout.CENTER);

        // 重绘窗体
        repaint();

        // 判断是否有记录行
        if (rows.isEmpty()) {
    
    
            JOptionPane.showMessageDialog(this, "没有符合条件的记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
            txtDepartment.setText("");
        } else {
    
    
            // 让滚动条移到最上方
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    public static void main(String[] args) {
    
    
        new FindStudentsByDepartmentFrame("");
    }
}

（十七）、FindStudentsByNameFrame

package net.dc.student.gui;

import net.dc.student.bean.Student;
import net.dc.student.service.StudentService;
import net.dc.student.service.impl.StudentServiceImpl;

import javax.swing.*;
import javax.swing.border.TitledBorder;
import java.awt.*;
import java.awt.event.*;
import java.awt.print.PrinterException;
import java.util.Vector;
import java.util.List;

/**
 * 功能：按姓名查询学生记录
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class FindStudentsByNameFrame extends JFrame {
    
    
    private JLabel lblInputId; // 学号标签
    private JTextField txtName; // 姓名文本框

    private JPanel panel;
    private JPanel pnlSouth;
    private JPanel pnlCenter;
    private JPanel pnlNorth;

    private JButton btnQuery;
    private JButton btnBrowseAll;
    private JButton btnPrint;
    private JButton btnExit;

    private JScrollPane scroller;  // 滚动面板

    private Vector rows; // 记录行集
    private Vector<String> colHead; // 表格列标题
    private JTable table; // 表格
    private List<Student> students; // 学生列表
    private StudentService studentService; // 学生服务对象

    public FindStudentsByNameFrame(String title) {
    
    
        super(title);
        intiGUI();
    }

    /**
     * 初始化用户界面
     */
    private void intiGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        pnlNorth = new JPanel();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        rows = new Vector();
        colHead = new Vector();

        lblInputId = new JLabel("输入姓名：");
        txtName = new JTextField(10);
        txtName.setHorizontalAlignment(JTextField.CENTER);
        btnQuery = new JButton("查询[Q]");
        btnQuery.setMnemonic(KeyEvent.VK_Q);
        btnBrowseAll = new JButton("显示全部记录[A]");
        btnBrowseAll.setMnemonic(KeyEvent.VK_A);
        btnPrint = new JButton("打印[P]");
        btnPrint.setMnemonic(KeyEvent.VK_D);
        btnExit = new JButton("退出[X]");
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.add(pnlSouth, BorderLayout.SOUTH);
        panel.add(pnlCenter, BorderLayout.CENTER);
        panel.add(pnlNorth, BorderLayout.NORTH);

        pnlNorth.add(lblInputId);
        pnlNorth.add(txtName);
        pnlNorth.add(btnQuery);
        pnlNorth.add(btnBrowseAll);
        pnlSouth.setLayout(new FlowLayout(FlowLayout.RIGHT));
        pnlSouth.add(btnPrint);
        pnlSouth.add(btnExit);
        pnlCenter.setLayout(new BorderLayout());

        // 创建标题边框对象
        TitledBorder tb = new TitledBorder("查询结果");
        pnlCenter.setBorder(tb);

        // 创建学生服务对象
        studentService = new StudentServiceImpl();
        // 获取全部学生列表
        students = studentService.findAllStudents();
        // 填充表格数据
        fillTableData();

        // 设置窗口大小
        setSize(600, 350);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口标题
        setTitle("按姓名查询学生记录");
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 【退出】按钮单击事件
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                dispose();
            }
        });

        // 【打印】按钮单击事件
        btnPrint.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                try {
    
    
                    table.print();
                } catch (PrinterException e1) {
    
    
                    e1.printStackTrace();
                }
            }
        });

        // 【查询】按钮单击事件
        btnQuery.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                doQuery();
            }
        });

        // 【显示全部记录】按钮单击事件
        btnBrowseAll.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                // 获取全部学生记录
                students = studentService.findAllStudents();
                // 填充表格数据
                fillTableData();
                // 删除按钮不可用
                btnPrint.setEnabled(false);
            }
        });

        // 【学号】文本框按键事件
        txtName.addKeyListener(new KeyAdapter() {
    
    
            @Override
            public void keyPressed(KeyEvent e) {
    
    
                if (e.getKeyCode() == KeyEvent.VK_ENTER) {
    
    
                    doQuery();
                }
            }
        });

        // 表格单击事件
        table.addMouseListener(new MouseAdapter() {
    
    
            public void mouseClicked(MouseEvent e) {
    
    
                // 获取当前行的行数
                int row = table.rowAtPoint(e.getPoint());
                // 选中鼠标单击的行
                table.setRowSelectionInterval(row, row);
                // 设置文本框内容
                txtName.setText(table.getValueAt(row, 1).toString());
            }
        });
    }

    /**
     * 查询方法
     */
    private void doQuery() {
    
    
        // 获取查询姓名
        String name = txtName.getText().trim();
        if (!name.equals("")) {
    
    
            students.clear();
            List<Student> stuList = studentService.findStudentsByName(name);
            // 将查询到的学生添加到列表
            students.addAll(stuList);
            // 填充表格
            fillTableData();
        } else {
    
    
            JOptionPane.showMessageDialog(this, "请输入待查学生姓名！", "警告", JOptionPane.WARNING_MESSAGE);
            txtName.requestFocus();
        }
    }

    /**
     * 填充表格方法
     */
    private void fillTableData() {
    
    
        // 填充表头
        colHead.clear();
        colHead.add("学号");
        colHead.add("姓名");
        colHead.add("性别");
        colHead.add("年龄");
        colHead.add("系部");
        colHead.add("班级");
        colHead.add("电话");

        // 填充表记录
        rows.clear();
        for (Student student : students) {
    
    
            Vector<String> currentRow = new Vector<String>();
            currentRow.addElement(student.getId());
            currentRow.addElement(student.getName());
            currentRow.addElement(student.getSex());
            currentRow.addElement(student.getAge() + "");
            currentRow.addElement(student.getDepartment());
            currentRow.addElement(student.getClazz());
            currentRow.addElement(student.getTelephone());
            // 将当前行添加到记录行集
            rows.add(currentRow);
        }

        // 创建表格（参数1：记录集；参数2：表头）
        table = new JTable(rows, colHead);

        // 定义滚动面板
        scroller = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
        // 将滚动面板添加到中心面板
        pnlCenter.add(scroller, BorderLayout.CENTER);

        // 重绘窗体
        repaint();

        // 判断是否有记录行
        if (rows.isEmpty()) {
    
    
            JOptionPane.showMessageDialog(this, "没有符合条件的记录！", "错误提示", JOptionPane.WARNING_MESSAGE);
            txtName.setText("");
        } else {
    
    
            // 让滚动条移到最上方
            scroller.getVerticalScrollBar().setValue(0);
        }
    }

    public static void main(String[] args) {
    
    
        new FindStudentsByNameFrame("");
    }
}

（十八）、SetCollegeInfoFrame

package net.dc.student.gui;

import net.dc.student.bean.College;
import net.dc.student.service.CollegeService;
import net.dc.student.service.impl.CollegeServiceImpl;

import javax.imageio.stream.ImageInputStream;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.sql.Time;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;

/**
 * 功能：设置学校信息
 * 作者：邓聪
 * 日期：2020年07月12日
 */
public class SetCollegeInfoFrame extends JFrame {
    
    
    JPanel panel;
    JPanel pnlNorth;
    JPanel panel1;
    JPanel panel2;
    JPanel panel3;
    JPanel panel4;
    JPanel panel5;
    JPanel pnlCenter;
    JPanel pnlSouth;

    JLabel lblName;
    JLabel lblPresident;
    JLabel lblStartTime;
    JLabel lblTelephone;
    JLabel lblEmail;
    JLabel lblAddress;
    JLabel lblProfile;

    JButton btnSave;
    JButton btnExit;

    JTextField txtName;
    JTextField txtPresident;
    JTextField txtStartTime;
    JTextField txtTelephone;
    JTextField txtEMail;
    JTextField txtAddress;
    JTextArea txtProfile;

    JScrollPane scrollPane;

    private CollegeService collegeService;
    private College college;
    private int id = 1;

    public SetCollegeInfoFrame(String title) {
    
    
        super(title);
        initGUI();
    }

    private void initGUI() {
    
    
        // 创建组件（面板与控件）
        panel = (JPanel) getContentPane();
        pnlNorth = new JPanel();
        panel1 = new JPanel();
        panel2 = new JPanel();
        panel3 = new JPanel();
        panel4 = new JPanel();
        panel5 = new JPanel();
        pnlCenter = new JPanel();
        pnlSouth = new JPanel();

        lblName = new JLabel("学校名称: ");
        lblPresident = new JLabel("校       长:");
        lblStartTime = new JLabel("建校时间:");
        lblTelephone = new JLabel("联系电话:");
        lblEmail = new JLabel("电子邮箱:");
        lblAddress = new JLabel("通讯地址:");
        lblProfile = new JLabel("学校简介:");

        txtName = new JTextField(30);
        txtPresident = new JTextField(11);
        txtStartTime = new JTextField(12);
        txtTelephone = new JTextField(11);
        txtEMail = new JTextField(12);
        txtAddress = new JTextField(30);
        txtProfile = new JTextArea(5, 37);
        txtProfile.setLineWrap(true);// 让文本自动换行
        scrollPane = new JScrollPane(txtProfile, ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
                ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
        btnSave = new JButton("保存[S]");
        btnSave.setMnemonic(KeyEvent.VK_S);
        btnExit = new JButton("退出[X]");
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 设置大面板布局，将北面板，中面板以及南面板添加到大面板
        panel.setLayout(new BorderLayout());
        panel.add(pnlNorth, "North");
        panel.add(pnlCenter, "Center");
        panel.add(pnlSouth, "South");

        // 设置北面板布局，添加五个小面板
        pnlNorth.setLayout(new GridLayout(5, 1));
        pnlNorth.add(panel1);
        pnlNorth.add(panel2);
        pnlNorth.add(panel3);
        pnlNorth.add(panel4);
        pnlNorth.add(panel5);

        // 将控件依次添加到五个小面板
        panel1.add(lblName);
        panel1.add(txtName);
        panel2.add(lblPresident);
        panel2.add(txtPresident);
        panel2.add(lblStartTime);
        panel2.add(txtStartTime);
        panel3.add(lblTelephone);
        panel3.add(txtTelephone);
        panel3.add(lblEmail);
        panel3.add(txtEMail);
        panel4.add(lblAddress);
        panel4.add(txtAddress);
        panel5.add(lblProfile);

        // 将滚动面板添加到中面板
        pnlCenter.add(scrollPane);

        // 将两个按钮添加到南面板
        pnlSouth.add(btnSave);
        pnlSouth.add(btnExit);

        // 创建学校服务对象
        collegeService = new CollegeServiceImpl();
        // 获取学校对象
        college = collegeService.findCollegeById(id);
        // 利用学校对象属性值设置相应控件的内容
        txtName.setText(college.getName());
        txtPresident.setText(college.getPresident());
        txtStartTime.setText(college.getStartTime().toString());
        txtTelephone.setText(college.getTelephone());
        txtEMail.setText(college.getEmail());
        txtAddress.setText(college.getAddress());
        txtProfile.setText(college.getProfile());

        // 设置窗口大小
        setSize(450, 350);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口刚好容纳组件
        pack();
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // [关闭]按钮单击事件处理
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                // 关闭窗口
                dispose();
            }
        });

        // [保存]按钮单击事件处理
        btnSave.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent event) {
    
    
                try {
    
    
                    // 修改学校对象属性
                    college.setName(txtName.getText());
                    college.setPresident(txtPresident.getText());
                    college.setStartTime(new Timestamp(
                            new SimpleDateFormat("yyyy-MM-dd").
                                    parse(txtStartTime.getText().toString()).getTime()
                    ));
                    college.setTelephone(txtTelephone.getText());
                    college.setEmail(txtEMail.getText());
                    college.setAddress(txtAddress.getText());
                    college.setProfile(txtProfile.getText());
                    // 更新学校信息
                    collegeService.updateCollege(college);
                    // 提示用户更新成功
                    JOptionPane.showMessageDialog(null, "数据更新成功！");
                } catch (ParseException e) {
    
    
                    // 提示用户更新失败
                    JOptionPane.showMessageDialog(null, "更细数据失败！");
                }
            }
        });
    }

    public static void main(String[] args) {
    
    
        new SetCollegeInfoFrame("设置学校信息");
    }
}

（十九）、SetStatusBarFrame

package net.dc.student.gui;

import net.dc.student.app.Application;
import net.dc.student.bean.Status;
import net.dc.student.service.StatusService;
import net.dc.student.service.impl.StatusServiceImpl;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

/**
 * 功能：设置状态栏信息
 * 作者：邓聪
 * 日期：2020年07月12日
*/


public class SetStatusBarFrame extends JFrame {
    
    
    private JPanel panel;
    private JPanel panel1;
    private JPanel panel2;
    private JPanel panel3;
    private JPanel panel4;
    private JPanel panel5;

    private JLabel lblCollege;
    private JLabel lblVersion;
    private JLabel lblAuthor;
    private JLabel lblTelephone;
    private JLabel lblAddress;
    private JLabel lblEmail;

    private JTextField txtCollege;
    private JTextField txtVersion;
    private JTextField txtAuthor;
    private JTextField txtTelephone;
    private JTextField txtAddress;
    private JTextField txtEmail;

    private JButton btnSave;
    private JButton btnExit;

    private StatusService statusService; // 状态服务对象

    public SetStatusBarFrame(String title) {
    
    
        super(title);
        initGUI();
    }

    private void initGUI() {
    
    
        // 创建组件
        panel = (JPanel) getContentPane();
        panel1 = new JPanel();
        panel2 = new JPanel();
        panel3 = new JPanel();
        panel4 = new JPanel();
        panel5 = new JPanel();

        lblCollege = new JLabel("校名：");
        lblVersion = new JLabel("版本：");
        lblAuthor = new JLabel("作者：");
        lblTelephone = new JLabel("电话：");
        lblAddress = new JLabel("地址：");
        lblEmail = new JLabel("邮件：");

        txtCollege = new JTextField(12);
        txtVersion = new JTextField(12);
        txtAuthor = new JTextField(12);
        txtTelephone = new JTextField(12);
        txtAddress = new JTextField(29);
        txtEmail = new JTextField(29);

        btnSave = new JButton("保存[S]");
        btnSave.setMnemonic(KeyEvent.VK_S);
        btnExit = new JButton("退出[X]");
        btnExit.setMnemonic(KeyEvent.VK_X);

        // 添加组件
        panel.setLayout(new GridLayout(5, 1));
        panel.add(panel1);
        panel.add(panel2);
        panel.add(panel3);
        panel.add(panel4);
        panel.add(panel5);

        panel1.add(lblCollege);
        panel1.add(txtCollege);
        panel1.add(lblVersion);
        panel1.add(txtVersion);

        panel2.add(lblAuthor);
        panel2.add(txtAuthor);
        panel2.add(lblTelephone);
        panel2.add(txtTelephone);

        panel3.add(lblAddress);
        panel3.add(txtAddress);
        panel4.add(lblEmail);
        panel4.add(txtEmail);

        panel5.add(btnSave);
        panel5.add(btnExit);

        // 创建状态服务对象
        statusService = new StatusServiceImpl();
        // 按标识符获取状态对象
        Status status = statusService.findStatusById(1);
        if (status != null) {
    
    
            txtCollege.setText(status.getCollege());
            txtVersion.setText(status.getVersion());
            txtAuthor.setText(status.getAuthor());
            txtAddress.setText(status.getAuthor());
            txtTelephone.setText(status.getTelephone());
            txtAddress.setText(status.getAddress());
            txtEmail.setText(status.getEmail());
        }

        // 设置窗口大小
        setSize(450, 350);
        // 设置窗口屏幕居中
        setLocationRelativeTo(null);
        // 设置窗口不可调整大小
        setResizable(false);
        // 设置窗口刚好容纳组件
        pack();
        // 设置窗口标题
        setTitle("设置状态栏信息");
        // 设置窗口可见
        setVisible(true);
        // 设置窗口默认关闭操作（卸载当前窗口）
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

        // 【关闭】按钮事件处理
        btnExit.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent arg0) {
    
    
                dispose();
            }
        });

        // 【保存】按钮事件处理
        btnSave.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                // 获取状态信息对象
                Status status = statusService.findStatusById(1);
                // 修改属性值
                status.setCollege(txtCollege.getText());
                status.setVersion(txtVersion.getText());
                status.setAuthor(txtAuthor.getText());
                status.setTelephone(txtTelephone.getText());
                status.setAddress(txtAddress.getText());
                status.setEmail(txtEmail.getText());
                // 更新状态记录
                int count = statusService.updateStatus(status);
                // 判断是否更新成功
                if (count > 0) {
    
    
                    Application.mainFrame.setStatusBar();
                    Application.mainFrame.setTitle("学生信息管理系统" + status.getVersion());
                }
            }
        });
    }
}