Java学生管理系统

1.准备环境
win7 eclipse sql2008sever
连接数据库需要jar包，上篇文章已写
2.定义模块
（1）StuManage：主界面
（2）StuModel：数据模型
（3）StuAddDialog：添加学生信息模块
（4）StuUpDialog：修改学生信息模块
3. 模块源码
StuManage源码：

package cn.test.StuManager;


import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;

import com.mysql.jdbc.PreparedStatement;

/**
 * 
 * @author lihua
 *学生管理系统 mini1
 *1.查询
 *2.添加
 */
public class StuMange extends JFrame implements ActionListener{
//定义组件
	JPanel jp1,jp2;
	JLabel jl1;
	JButton jb1,jb2,jb3,jb4;
	JTable jt;
	JScrollPane jsp;
	JTextField jtf;
	StuModel sm;
	//定义操作数据需要的组件
	java.sql.PreparedStatement ps=null;
	Connection ct;
	ResultSet rs=null;
	public static void main(String[] args) {
		try {
			//将当前窗体的外观设置为所在操作系统的外观
       UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
		} catch (ClassNotFoundException e) {
			// TODO: handle exception
		} catch (InstantiationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (UnsupportedLookAndFeelException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		new StuMange();		
	}
	//构造函数
   public StuMange() {
		// TODO Auto-generated constructor stub
	   jp1=new JPanel();
	   jtf=new JTextField(10);
	   jb1=new JButton("查询");
	   jb1.addActionListener(this);
	   jl1=new JLabel("请输入名字");
	   //把各个空间加入队
	   jp1.add(jl1);
	   jp1.add(jtf);
	   jp1.add(jb1);
	   
	   jp2=new JPanel();
	   jb2=new JButton("添加");
	   jb2.addActionListener(this);
	   jb3=new JButton("修改");
	   jb3.addActionListener(this);
	   jb4=new JButton("删除");
	   jb4.addActionListener(this);
	   //把各个按钮加入到jp2中
	   jp2.add(jb2);
	   jp2.add(jb3);
	   jp2.add(jb4);
	   //创建一个数据对象模型
	   sm=new StuModel();
	   //初始化JTabel
	   jt=new JTable(sm);
	   //初始化jsp 
	   jsp=new JScrollPane(jt);
	   //将jsp放入jframe
	   this.add(jsp);
	   this.add(jp1,"North");
	   this.add(jp2,"South");
	   
	   this.setSize(400,300);
	   this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	   this.setVisible(true);
	}
	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if (e.getSource()==jb1) {
			//因为把对表的数据封装到StuModel中，我们就可以比较简单的完成查询
			String name =this.jtf.getText();
			//写一个SQL语句
			String sql ="select * from stu where stuName='"+name+"'";
			//构建新的数据模型类，并更新
			sm=new StuModel(sql);
			//更新JTabel
			jt.setModel(sm);
		}
		//用户点击添加时
		else if (e.getSource()==jb2) {
			StuAddDialog sa=new StuAddDialog(this, "添加学生信息", true);
			//重新再获得数据模型
			//构建新的数据类型，并更新
			sm =new StuModel();
			//更新JTable
			jt.setModel(sm);
		}
		//用户修改数据
		else if (e.getSource()==jb3) {
			int rowNum=this.jt.getSelectedRow();
			if (rowNum==-1) {
				//提示
				JOptionPane.showMessageDialog(this, "请选择一行", "提示", JOptionPane.INFORMATION_MESSAGE);
				return;
			}
			//显示修改对话框			
			new StuUpDialog(this, "修改用户信息",true , sm, rowNum);
			//更新数据模型
			sm=new StuModel();
			//更新JTable
			jt.setModel(sm);
			//用户点击删除时，删除一条选中的数据
		}
		else if (e.getSource()==jb4) {
			//1.得到学生的ID号
			//getSelectedRow会返回用户点中得行
			//如果该用户一行都没有选择，就会返回-1
			int rowNum=this.jt.getSelectedRow();
			if (rowNum==-1) {
				//提示
				JOptionPane.showMessageDialog(this, "请选择一行", "提示", JOptionPane.INFORMATION_MESSAGE);
				return;
			}
			//得到学生编号
			String stuId=(String)sm.getValueAt(rowNum, 0);
			//连接数据库，完成删除任务
			try {
				//1.加载驱动
				Class.forName("com.mysql.jdbc.Driver");
				//2.得到连接
				ct=DriverManager.getConnection("jdbc:sqlserver://localhost:1433", "sa", "123456");
			    ps=ct.prepareStatement("delete from stu where stuid=?");
			   ps.setString(1, stuId);
			   ps.executeUpdate();
			} catch (Exception e2) {
				// TODO: handle exception
				e2.printStackTrace();
			}finally {
				try {
					if (rs!=null) {
						rs.close();
					}
					if (ps!=null) {
						ps.close();
					}
					if (ct!=null) {
						ct.close();
					}
				} catch (SQLException e1) {
					// TODO: handle exception
					e1.printStackTrace();
				}
				
			}
			//更新数据模型
			sm =new StuModel();
			//更新JTable
			jt.setModel(sm);
		}
	}

}

StuModel源码：

package cn.test.StuManager;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;

import javax.swing.table.AbstractTableModel;


import com.mysql.jdbc.RowData;


public class StuModel extends AbstractTableModel{

	//rowData用来存放行数据，columNames存放列名
	Vector rowData,columnNames;
	//定义操作数据库需要的组件
	PreparedStatement ps=null;
	Connection ct=null;
	ResultSet rs=null;
	public void init(String sql ) {
		if (sql==""||sql.equals(null)) {
			sql="select * from stu";
		}
		//中间
		columnNames=new Vector<>();
		//设置列名
		columnNames.add("学号");
		columnNames.add("名字");
		columnNames.add("性别");
		columnNames.add("年龄");
		columnNames.add("籍贯");
		columnNames.add("系别");
		
		rowData=new Vector<>();
		//rowData可以存放多行
		try {
			//1.加载驱动
			Class.forName("com.mysql.jdbc.Driver");
			//2.得到连接
			ct=DriverManager.getConnection("jdbc:sqlserver://localhost:1433", "sa", "123456");
			ps=ct.prepareStatement(sql);
			rs=ps.executeQuery();
			while (rs.next()) {
				Vector hang=new Vector<>();
				hang.add(rs.getString(1));
				hang.add(rs.getString(2));
				hang.add(rs.getString(3));
				hang.add(rs.getString(4));
				hang.add(rs.getString(5));
				hang.add(rs.getString(6));
				//加入rowData
				rowData.add(hang);
			}
		} catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		}finally {
			try {
			if (rs!=null) {
				rs.close();
			}
			if (ps!=null) {
				ps.close();
			}
			if (ct!=null) {
				ct.close();
			}
			} catch (SQLException e) {
				// TODO: handle exception
				e.printStackTrace();
			}
		}
	}
	//构造函数，用于初始化我们的数据模型
	public StuModel(String sql) {
		// TODO Auto-generated constructor stub
		this.init(sql);
	}
	//构造函数
	 public StuModel() {
		// TODO Auto-generated constructor stub
		 this.init("");
	}
		//得到共有多少列
	@Override
	public int getColumnCount() {
		// TODO Auto-generated method stub
		return this.columnNames.size();
	}
@Override
public String getColumnName(int column) {
	// TODO Auto-generated method stub
	return (String)this.columnNames.get(column);
}
//得到共有多少行
	@Override
	public int getRowCount() {
		// TODO Auto-generated method stub
		return this.rowData.size();
	}
	//得到某行某列的数据
	@Override
	public Object getValueAt(int rowIndex, int columnIndex) {
		// TODO Auto-generated method stub
		return ((Vector)this.rowData.get(rowIndex)).get(columnIndex);
	}

}

StuAddDialog源码;

package cn.test.StuManager;

import java.awt.BorderLayout;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.LinkedList;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;



public class StuAddDialog extends JDialog implements ActionListener{
//定义需要的Swing组件
	JLabel jl1,jl2,jl3,jl4,jl5,jl6;
	JButton jb1,jb2;
	JTextField jtf1,jtf2,jtf3,jtf4,jtf5,jtf6;
	JPanel jp1,jp2,jp3;
	//owener它的父窗口；title窗口名；model指定是模态窗口，还是非模态
	public StuAddDialog(Frame owner,String title,boolean modal) {
		// TODO Auto-generated constructor stub
		super(owner,title,modal);
		jl1=new JLabel("学号");
		jl2=new JLabel("名字");
		jl3=new JLabel("性别");
		jl4=new JLabel("年龄");
		jl5=new JLabel("籍贯");
		jl6=new JLabel("系别");
		
		jtf1=new JTextField();
		jtf2=new JTextField();
		jtf3=new JTextField();
		jtf4=new JTextField();
		jtf5=new JTextField();
		jtf6=new JTextField();
		
		jb1=new JButton("添加");
		jb2=new JButton("取消");
		
		jp1=new JPanel();
		jp2=new JPanel();
		jp3=new JPanel();
		
		//设置布局
		jp1.setLayout(new GridLayout(6, 1));
		jp2.setLayout(new GridLayout(6, 1));
		
		//添加组件
		jp1.add(jl1);
		jp1.add(jl2);
		jp1.add(jl3);
		jp1.add(jl4);
		jp1.add(jl5);
		jp1.add(jl6);
		
		jp2.add(jtf1);
		jp2.add(jtf2);
		jp2.add(jtf3);
		jp2.add(jtf4);
		jp2.add(jtf5);
		jp2.add(jtf6);
		
		jp3.add(jb1);
		jp3.add(jb2);
		
	this.add(jp1,BorderLayout.WEST);
	this.add(jp2,BorderLayout.CENTER);
	this.add(jp3,BorderLayout.SOUTH);
	
	jb1.addActionListener(this);
	jb2.addActionListener(this);
	//展现
	this.setSize(300, 250);
	this.setVisible(true);
	}
	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
          //用户点击添加按钮后的响应动作
		if (e.getSource()==jb1) {
			//连接数据库
			Connection ct=null;
			Statement stmt=null;
			ResultSet rs=null;
			PreparedStatement ps=null;
			//连接数据库
			try {
				//加载驱动
				Class.forName("com.mysql.jdbc.Driver");
				ct=DriverManager.getConnection("jdbc:sqlserver://localhost:1433", "sa","123456");
				String strsql="insert into stu values(?,?,?,?,?,?)";
			    ps=ct.prepareStatement(strsql);
			    ps.setString(1, jtf1.getText());
			    ps.setString(2, jtf2.getText());
			    ps.setString(4, jtf3.getText());
			    ps.setInt(3, Integer.parseInt(jtf4.getText()));
			    ps.setString(5, jtf5.getText());
			    ps.setString(6, jtf6.getText());
			   ps.executeUpdate();
			   this.dispose();
			
			} catch (Exception e2) {
				// TODO: handle exception
				e2.printStackTrace();
			}finally {
				try {
					if (ps!=null) {
						ps.close();
					}
					if (ct!=null) {
						ct.close();
					}
				} catch (SQLException e1) {
					// TODO: handle exception'
					e1.printStackTrace();
				}
			}
		}
		else if (e.getSource()==jb2) {
			this.dispose();
		}
	}

}

StuUpDialog源码：

package cn.test.StuManager;

import java.awt.BorderLayout;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class StuUpDialog extends JDialog implements ActionListener{
//定义需要的swing组件
	JLabel jl1,jl2,jl3,jl4,jl5,jl6;
	JButton jb1,jb2;
	JTextField jtf1,jtf2,jtf3,jtf4,jtf5,jtf6;
	JPanel jp1,jp2,jp3;
	//owner它的父窗口；title窗口名，modal指定是模态窗口，还是非模态窗口
	public StuUpDialog(Frame owner,String title,boolean modal,StuModel sm,int rowNum) {
		// TODO Auto-generated constructor stub
		super(owner, title, modal);//调用父类构造方法，达到模式对话框的效果
		jl1=new JLabel("学号");
		jl2=new JLabel("名字");
		jl3=new JLabel("性别");
		jl4=new JLabel("年龄");
		jl5=new JLabel("籍贯");
		jl6=new JLabel("系列");
		
		jtf1=new JTextField();
		//初始化数据
		jtf1.setText((String)sm.getValueAt(rowNum, 0));
		//让jtf1不能修改
		jtf1.setEditable(false);
		jtf2=new JTextField();
		jtf2.setText((String)sm.getValueAt(rowNum, 1));
		jtf3=new JTextField();
		jtf3.setText((String)sm.getValueAt(rowNum, 2));
		jtf4=new JTextField();
		jtf4.setText(sm.getValueAt(rowNum, 3).toString());
		jtf5=new JTextField();
		jtf5.setText((String)sm.getValueAt(rowNum, 4));
		jtf6=new JTextField();
		jtf6.setText((String)sm.getValueAt(rowNum, 5));
		
		jb1=new JButton("修改");
		jb2=new JButton("取消");
		
		jp1=new JPanel();
		jp2=new JPanel();
		jp3=new JPanel();
		
		//设置布局
		jp1.setLayout(new GridLayout(6,1));
		jp2.setLayout(new GridLayout(6,1));
		
		//添加组件
		jp1.add(jl1);
		jp1.add(jl2);
		jp1.add(jl3);
		jp1.add(jl4);
		jp1.add(jl5);
		jp1.add(jl6);
		
		jp2.add(jtf1);
		jp2.add(jtf2);
		jp2.add(jtf3);
		jp2.add(jtf4);
		jp2.add(jtf5);
		jp2.add(jtf6);
		
		jp3.add(jb1);
		jp3.add(jb2);
		
		this.add(jp1,BorderLayout.WEST);
		this.add(jp2,BorderLayout.CENTER);
		this.add(jp3,BorderLayout.SOUTH);
		
		jb1.addActionListener(this);
		jb2.addActionListener(this);
		
		//展现
		this.setSize(300, 250);
		this.setVisible(true);
	}
	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
	    //用户点击添加按钮后的响应动作
			if (e.getSource()==jb1) {
				//连接数据库
				Connection ct=null;
				Statement stmt=null;
				ResultSet rs=null;
				PreparedStatement ps=null;
				//连接数据库
				try {
					//加载驱动
					Class.forName("com.mysql.jdbc.Driver");
					ct=DriverManager.getConnection("jdbc:sqlserver://localhost:1433", "sa","123456");
					String strsql="update stu set stuName=?,stuSex=?,stuAge=?,stuJg=?,stuDept=? where stuId=?";
				    ps=ct.prepareStatement(strsql);
				    ps.setString(1, jtf2.getText());
				    ps.setString(2, jtf3.getText());
				    ps.setInt(3, Integer.parseInt(jtf4.getText()));
				    ps.setString(4, jtf5.getText());
				    ps.setString(5, jtf6.getText());
				    ps.setString(6, jtf1.getText());
				   ps.executeUpdate();
				   this.dispose();
				
				} catch (Exception e2) {
					// TODO: handle exception
					e2.printStackTrace();
				}finally {
					try {
						if (ps!=null) {
							ps.close();
						}
						if (ct!=null) {
							ct.close();
						}
					} catch (SQLException e1) {
						// TODO: handle exception'
						e1.printStackTrace();
					}
				}
			}
			else if (e.getSource()==jb2) {
				this.dispose();
			}
	}

}

4.运行