73 lines
2.3 KiB
Java
73 lines
2.3 KiB
Java
package com.example;
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import javax.swing.*;
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import java.awt.*;
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import java.awt.event.ActionEvent;
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import java.awt.event.ActionListener;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import java.util.Random;
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public class Main extends JFrame implements ActionListener {
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JButton jb1,jb2;
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JTextField tf1,tf3;
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JPasswordField tf2;
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JLabel jl1,jl2,jl3,jl4,jl5;
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Random rand = new Random();
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Main(){
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super("登录");
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jb1=new JButton("登录");
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jb2=new JButton("取消");
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tf1=new JTextField(6);
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tf2=new JPasswordField(6);
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tf3=new JTextField(6);
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jl1=new JLabel("用户名",JLabel.CENTER);
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jl2=new JLabel("密码",JLabel.CENTER);
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jl3=new JLabel("验证码",JLabel.CENTER);
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jl4=new JLabel("验证码：",JLabel.CENTER);
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jl5=new JLabel("",JLabel.CENTER);
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jb1.addActionListener(this);
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jb2.addActionListener(this);
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setLayout(new GridLayout(5,2));
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setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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add(jl1);add(tf1);
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add(jl2);add(tf2);
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add(jl3);add(tf3);
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add(jl4);add(jl5);
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add(jb1);add(jb2);
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jl5.setText(Integer.toString(rand.nextInt(100)+100));
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setBounds(500,100,500,500);
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setVisible(true);
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}
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@Override
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public void actionPerformed(ActionEvent e) {
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if(e.getSource()==jb1){
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Jdbc jdbc = new Jdbc();
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String sql = "select * from user where username='"+tf1.getText()+"' and password='"+tf2.getText()+"'"; ;
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try {
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ResultSet rs = jdbc.query(sql);
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jdbc.close();
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if(rs.next()&&tf3.getText().equals(jl5.getText())) {
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JOptionPane.showMessageDialog(null, "登录成功");
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new Home();
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this.setVisible(false);
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}
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else{
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JOptionPane.showMessageDialog(null,"登录失败");
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jl5.setText(Integer.toString(rand.nextInt(100)+100));
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}
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} catch (SQLException ex) {
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throw new RuntimeException(ex);
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}
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}else if(e.getSource()==jb2){
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System.exit(0);
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}
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}
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public static void main(String[] args) {
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new Main();
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}
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} |