Java实现登陆注册界面

一、工具准备
1.Java开发集成工具 : mycilpse (可以采用更先进的idea intellij)
2.包：jdbc包
3.数据库：sql server

二、知识需求

       1.java swing (也可采用SWT designer进行辅助界面设计 )
       
       所用组件：
       JButton:登陆
       JLabel:使用JLabel(new ImgeIcon(url)),进行背景设置，最好使用相对地址 "/" 将图片放在程序文件之中，也可使用本地地址：“\"
       JTextField:文本框,进行账号和密码输入
       JComboBox:下拉列表框，进行登陆角色选择
       
       更多可以参考这个博主文章或者官方文档，写得很全。[Swing 学习](https://blog.csdn.net/xietansheng/article/details/72814492)
       
       2.sql （连数据库请见 https://blog.csdn.net/qq_44654974/article/details/106676570）
     
      登陆注册：只需要进行用户检测和添加
      select * from usertable 
      Insert usertable values('Username','Password')

三、代码

登陆界面：

package View;

import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class Login extends JFrame {
	public static String usern;

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

	Login() {
		Content();
		this.setTitle("企业员工健康系统");
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.setLocation(600, 300);
		this.setSize(800, 560);
		this.setVisible(true);
	}

	void Content() {

		// 背景设置
		JLabel bg = new JLabel(new ImageIcon("Images/LoginIcon/LoginBg.png"));
		this.setContentPane(bg);

		// 登陆板块内容

		JLabel logo = new JLabel("你的健康，我来负责");
		logo.setBounds(20, 20, 180, 25);
		logo.setFont(new Font(null, Font.BOLD, 16));// 字体设置
		logo.setForeground(Color.orange);
		this.add(logo);

		JLabel label = new JLabel("欢迎登陆");
		label.setBounds(380, 180, 120, 25);
		label.setFont(new Font(null, Font.BOLD, 18));// 字体设置
		this.add(label);

		JLabel User = new JLabel("账号");
		User.setBounds(320, 222, 30, 25);
		User.setFont(new Font(null, Font.PLAIN, 14));// 字体设置
		this.add(User);

		JLabel User1 = new JLabel(new ImageIcon("Images/LoginIcon/User.png"));
		User1.setBounds(350, 220, 30, 30);
		this.add(User1);

		JLabel Password = new JLabel("密码");
		Password.setBounds(320, 254, 30, 25);
		Password.setFont(new Font(null, Font.PLAIN, 14));// 字体设置
		this.add(Password);

		JLabel Password1 = new JLabel(new ImageIcon("Images/LoginIcon/Lock.png"));
		Password1.setBounds(352, 250, 30, 30);
		this.add(Password1);

		JLabel Type = new JLabel("用户");
		Type.setBounds(320, 286, 30, 25);
		Type.setFont(new Font(null, Font.PLAIN, 14));// 字体设置
		this.add(Type);

		JLabel Type1 = new JLabel(new ImageIcon("Images/LoginIcon/Type.png"));
		Type1.setBounds(350, 280, 30, 30);
		this.add(Type1);

		// 文本框和按钮

		JButton btn = new JButton("登陆");
		btn.setBounds(320, 320, 70, 25);
		this.add(btn);

		JButton btn1 = new JButton("注册");
		btn1.setBounds(430, 320, 70, 25);
		this.add(btn1);

		JTextField User2 = new JTextField();
		User2.setBounds(380, 222, 120, 25);
		this.add(User2);

		JPasswordField Password2 = new JPasswordField();
		Password2.setBounds(380, 254, 120, 25);
		this.add(Password2);

		String[] listData = new String[] { "员工", "企业管理者", "系统管理员" };
		JComboBox<String> type1 = new JComboBox<String>(listData);

		type1.setBounds(380, 284, 120, 25);
		this.add(type1);

		JPanel panel = new JPanel(null);
		panel.setBounds(290, 170, 245, 200);
		panel.setBackground(Color.WHITE);
		panel.setBorder(BorderFactory.createLineBorder(Color.gray));
		this.add(panel);

		JLabel Mention = new JLabel("");
		Mention.setBounds(310, 100, 280, 25);
		Mention.setForeground(Color.RED);
		Mention.setFont(new Font(null, Font.BOLD, 14));
		this.add(Mention);

		// 登陆事件
		btn.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				// System.out.print(type1.getSelectedIndex());
				String LoginID = User2.getText();
				String password = Password2.getText();
				String type = listData[type1.getSelectedIndex()];

				if (new Data.Login().Check(LoginID, password, type)) {
					dispose();

					if (type.equals("员工")) {
						usern = LoginID;
						new EmployMain().open();
					} else if (type.equals("企业管理者")) {
						new Admin().open();
					} else if (type.equals("系统管理员")) {
						//
						dispose();
						new ADMIN1();
					}

				} else {
					Mention.setText("输入信息有误，请重新输入");

					try {

						Thread.sleep(2000);

					} catch (InterruptedException e1) {
						// TODO Auto-generated catch block
						e1.printStackTrace();
					}

					// Mention.setText("2");

				}

			}

		});

		// 注册事件
		btn1.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				dispose();
				Register R = new Register();
			}

		});
	}
}

效果展示：

注册界面：

package View;

import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

public class Register extends JFrame{
	String CODE;
	String NAME;
	/**
	 * Launch the application.
	 */
	public static void main(String[] args) {
	  new Register();
	}

	/**
	 * Create the application.
	 */
	public Register() {
		initialize();
		this.setBounds(500, 300, 800, 560);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setTitle("注册界面");
		this.setLocation(500, 300);
		this.setVisible(true);
	}

	/**
	 * Initialize the contents of the frame.
	 */
	private void initialize() {
		
		
		
		JLabel bg = new JLabel(new ImageIcon("Images/Register/BG2.jpg"));
		this.setContentPane(bg);
		
		
		JLabel label = new JLabel("欢迎注册");
		label.setBounds(380, 180, 120, 25);
		label.setFont(new Font(null, Font.BOLD, 18));// 字体设置
		this.add(label);

		JLabel User = new JLabel("账号");
		User.setBounds(322, 222, 30, 25);
		User.setFont(new Font(null, Font.PLAIN, 14));// 字体设置
		this.add(User);

		JLabel User1 = new JLabel(new ImageIcon("Images/LoginIcon/User.png"));
		User1.setBounds(350, 220, 30, 30);
		this.add(User1);

		
		JLabel Password = new JLabel("密码");
		Password.setBounds(322, 254, 30, 25);
		Password.setFont(new Font(null, Font.PLAIN, 14));// 字体设置
		this.add(Password);

		JLabel Password1 = new JLabel(new ImageIcon("Images/LoginIcon/Lock.png"));
		Password1.setBounds(352, 250, 30, 30);
		this.add(Password1);
       
		VerificationCodeImgUtil V=new VerificationCodeImgUtil();
		//new VerificationCodeImgUtil().Excute();
		V.Excute();
	    CODE=V.code;
		NAME=V.Name;
		JLabel Check = new JLabel(new ImageIcon("Images/RadomCheck/"+NAME+".png"));
		System.out.println("2:"+CODE);
		Check.setBounds(322, 285, 120, 30);
		this.add(Check);
		
        
		
		
		JTextField Check2 = new JTextField();
		Check2.setBounds(444, 285, 55, 30);
		this.add(Check2);
		
		// 文本框和按钮

		JButton btn = new JButton("注册");
		btn.setBounds(320, 325, 180, 25);
		this.add(btn);
		

		JTextField User2 = new JTextField();
		User2.setBounds(380, 222, 120, 25);
		this.add(User2);

		JPasswordField Password2 = new JPasswordField();
		Password2.setBounds(380, 254, 120, 25);
		this.add(Password2);
		
		JPanel panel = new JPanel(null);
		panel.setBounds(290, 170, 245, 200);
		panel.setBackground(Color.WHITE);
		panel.setBorder(BorderFactory.createLineBorder(Color.gray));
		this.add(panel);
		
		
		JButton return1=new JButton("返回");
		return1.setBounds(10, 10, 60, 25);
		this.add(return1);
		


		
		
		return1.addActionListener(new ActionListener(){

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				dispose();
				new Login();
				
			}
			
		});
		//事件处理
		
		
		JLabel Mention=new JLabel("");
		Mention.setBounds(350, 100, 120, 25);
		Mention.setForeground(Color.RED);
		Mention.setFont(new Font(null,Font.BOLD,17));
		this.add(Mention);
		
		
		JLabel Readme=new JLabel("注册须知 ");
		Readme.setBounds(620,200 , 120, 25);
		Readme.setForeground(Color.RED);
		this.add(Readme);
		
		JLabel Readme1=new JLabel(
				 "1.账号长度为5位，若纯数字"
				);
		Readme1.setBounds(580,230 , 160, 25);
		Readme1.setForeground(Color.RED);
		this.add(Readme1);
		
		
		JLabel Readme2=new JLabel(
				"需要大于00100"
				);
		Readme2.setBounds(580,260 , 160, 25);
		Readme2.setForeground(Color.RED);
		this.add(Readme2);
		
		JLabel Readme3=new JLabel(
				"2.密码需要在10位以内"
				);
		Readme3.setBounds(580,290 , 160, 25);
		Readme3.setForeground(Color.RED);
		this.add(Readme3);
		
		
		btn.addActionListener(new ActionListener(){

			@Override
			public void actionPerformed(ActionEvent e) {
				// TODO Auto-generated method stub
				//new VerificationCodeImgUtil().Excute();
				 //	NAME=new VerificationCodeImgUtil().Name;
				//Check.setIcon(new ImageIcon("Images/RadomCheck/"+NAME+".png") );
				System.out.print("Y");
			  
				
				//Check 密码、账号规范和验证码匹配
				String RadomCheck=Check2.getText();
				String Password=Password2.getText();
				String UserName=User2.getText();
				//String CODE=new VerificationCodeImgUtil().getCode();
			
				System.out.println(CODE+"　"+RadomCheck);
				
				if(RadomCheck.equals(CODE)){
					//
				   if(Password.length()>=10||UserName.length()!=5){
					   Mention.setText("注意注册规范！");
					   VerificationCodeImgUtil V=new VerificationCodeImgUtil();
						//new VerificationCodeImgUtil().Excute();
						V.Excute();
					    CODE=V.code;
						NAME=V.Name;
						Check.setIcon(new ImageIcon("Images/RadomCheck/"+NAME+".png") );
					   
					   
				   }else{
					   if(new Data.Login().Checkexist(UserName)){
						   Mention.setText("改用户名已注册！");
						   VerificationCodeImgUtil V=new VerificationCodeImgUtil();
							//new VerificationCodeImgUtil().Excute();
							V.Excute();
						    CODE=V.code;
							NAME=V.Name;
							Check.setIcon(new ImageIcon("Images/RadomCheck/"+NAME+".png") );
					   }else{
						   SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
						  String time= df.format(new Date());
						   
						   new Data.Login().InsertNewUser(UserName, Password,time);
						   Mention.setText("注册成功！");
						   try {
								
								Thread.sleep(2000);
								
							} catch (InterruptedException e1) {
								// TODO Auto-generated catch block
								e1.printStackTrace();
							}
						   Mention.setText("");
					   }
					   
				   }
					
					
//					dispose();
//					new Login();
				}else{//延时？？
					Mention.setText("验证码错误！");
					 VerificationCodeImgUtil V=new VerificationCodeImgUtil();
						//new VerificationCodeImgUtil().Excute();
						V.Excute();
					    CODE=V.code;
						NAME=V.Name;
						Check.setIcon(new ImageIcon("Images/RadomCheck/"+NAME+".png") );
					try {
						
						Thread.sleep(2000);
						
					} catch (InterruptedException e1) {
						// TODO Auto-generated catch block
						e1.printStackTrace();
					}
					
				}

			}
			
		});

	}

}

效果展示：