2023/9/18

package 验证码;

import javax.swing.*;
import java.awt.*;
import java.util.Random;
import java.util.Scanner;

public class 验证码 {
    public static void main(String[] args) {
        验证码 log=new 验证码();
        log.login();
    }
   public  void login (){
       JFrame jf=new JFrame();
       jf.setTitle("登录界面");
       jf.setSize(400,200);//创建宽高
       jf.setResizable(false);
       jf.setLocationRelativeTo(null);//设置居中打开
       jf.setDefaultCloseOperation(3);//设置关闭
       jf.setVisible(true);
       FlowLayout flow=new FlowLayout();
       jf.setLayout(flow);
       JButton btn=new JButton("登录");
       JLabel loginNumber=new JLabel("账号");
       JLabel passWord=new JLabel("密码");
       JLabel Code=new JLabel("验证码");
        String code="";
        String data="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        Random r=new Random();
       for (int i = 0; i < 6; i++) {
           int index=r.nextInt(data.length());
           code+=data.charAt(index);
       }
       String a=code;
       JTextField nameInput1=new JFormattedTextField();
       JTextField nameInput2=new JFormattedTextField();
       JTextField nameInput3=new JFormattedTextField();
       JTextField nameInput4=new JFormattedTextField(code);
       btn.setText("登录");
       Dimension dim=new Dimension(350,30);
       Dimension dim1=new Dimension(150,30);
       nameInput1.setPreferredSize(dim);
       nameInput2.setPreferredSize(dim);
       nameInput3.setPreferredSize(dim1);
       nameInput4.setPreferredSize(dim1);
       jf.add(loginNumber);
       jf.add(nameInput1);
       jf.add(passWord);
       jf.add(nameInput2);
       jf.add(Code);
       jf.add(nameInput3);
       jf.add(nameInput4);
       jf.add(btn);
       btn.addActionListener(actionEvent-> {
           if (nameInput1.getText().equals("123456")) {

           }else {
               System.out.println("账号错误");
           }
           if (nameInput2.getText().equals("123456")) {
           }else {
               System.out.println("密码错误，请您重新输入密码");
           }
           if (nameInput3.getText().equals(a)) {
               System.out.println("登陆成功");
           } else {
               System.out.println("验证码错误，请您重新输入验证码");
           }
           });
       jf.setVisible(true);
   }
}