9.15

用java实现了图形化登录界面

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Random;

public class Login {
    public static void main(String[] args) {
        Random random=new Random();
        String s="123456789qwertyuiopasdfghjklzxcvbnm";
        StringBuilder sb=new StringBuilder();
        for(int i=0;i<6;i++){
            int r=random.nextInt(0,35);
            sb.append(s.charAt(r));
        }
        String sma=sb.toString();
        ArrayList<number> arr=new ArrayList<>();
        number n=new number("20224052","307812737");
        arr.add(n);
        JButton login=new JButton("登录");
        JButton create=new JButton("注册");
        login.setBounds(60,190,100,30);
        create.setBounds(250,190,100,30);
        create.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent e) {
                JFrame jf1=new JFrame("注册界面");
                jf1.setSize(350,300);
                JButton c2=new JButton("确认");
                c2.setBounds(130,200,80,30);
                JTextField name=new JTextField();
                JLabel key1=new JLabel("密码：");
                JTextField key3=new JTextField();
                JTextField key4=new JTextField();
                key1.setFont(new Font("宋体",Font.PLAIN,14));
                JLabel key2=new JLabel("密码确认：");
                key2.setFont(new Font("宋体",Font.PLAIN,14));
                JLabel name1=new JLabel("账号：");
                name1.setFont(new Font("宋体",Font.PLAIN,14));
                Container c=jf1.getContentPane();
                name.setBounds(100,40,190,30);
                name1.setBounds(50,40,70,30);
                key1.setBounds(50,80,70,30);
                key2.setBounds(20,120,90,30);
                key3.setBounds(100,80,190,30);
                key4.setBounds(100,120,190,30);
                c.add(c2);
                c.add(name1);
                c.add(key1);
                c.add(key2);
                c.add(name);
                c.add(key3);
                c.add(key4);
                jf1.setDefaultCloseOperation(2);
                jf1.setLocationRelativeTo(null);
                jf1.setLayout(null);
                jf1.setVisible(true);
                c2.addActionListener(new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                        int flagname=0;
                        String n=name.getText().trim();
                        String k1=key3.getText().trim();
                        String k2=key4.getText().trim();
                        for(int i=0;i< arr.size();i++){
                            if(arr.get(i).getName().equals(n)){
                                flagname=1;
                            }
                        }
                        if(flagname==1){
                            JOptionPane.showMessageDialog(null,"该账户已注册");
                            return;
                        }else{
                            if(!k1.equals(k2)){
                                JOptionPane.showMessageDialog(null,"两次密码输入不一致");
                                return;
                            }else{
                                JOptionPane.showMessageDialog(null,"注册成功");
                                number x=new number(n,k1);
                                arr.add(x);
                            }
                        }
                    }
                });
            }
        });
        JLabel ma=new JLabel("验证码:"+sma);
        JLabel yama=new JLabel("验证码：");
        yama.setFont(new Font("宋体",Font.PLAIN,14));
        ma.setFont(new Font("宋体",Font.PLAIN,14));
        JLabel key=new JLabel("密码：");
        key.setFont(new Font("宋体",Font.PLAIN,14));
        JLabel name=new JLabel("账号：");
        name.setFont(new Font("宋体",Font.PLAIN,14));
        JFrame jf=new JFrame("登录界面");
        jf.add(name);
        JTextField textma=new JTextField();
        JTextField textname=new JTextField();
        JPasswordField textkey=new JPasswordField();
        login.addActionListener(new ActionListener(){
            @Override
            public void actionPerformed(ActionEvent e){
                int flagname=0,flagkey=0,index=0;
                String name=textname.getText().trim();
                String key=new String(textkey.getPassword()).trim();
                String ma=textma.getText().trim();
                if(name.equals("")){
                    JOptionPane.showMessageDialog(null,"请输入账号");
                    return;
                }
                for(int i=0;i< arr.size();i++){
                    if(arr.get(i).getName().equals(name)){
                        flagname=1;
                        index=i;
                    }
                }
                if(flagname==0){
                    JOptionPane.showMessageDialog(null,"该账号尚未注册");
                    return;
                }else{
                    if(!arr.get(index).getKey().equals(key)){
                        JOptionPane.showMessageDialog(null,"密码错误");
                        return;
                    }else{
                        if(ma.equals(sma)) {
                            JOptionPane.showMessageDialog(null, "登录成功");
                        }else{
                            JOptionPane.showMessageDialog(null,"验证码错误");
                        }
                    }
                }
            }
        });
        textname.setBounds(120,40,210,30);
        textkey.setBounds(120,90,210,30);
        name.setBounds(70,40,100,30);
        key.setBounds(70,90,100,30);
        ma.setBounds(240,140,100,30);
        yama.setBounds(50,140,80,30);
        textma.setBounds(100,140,100,30);
        Container c=jf.getContentPane();
        c.add(create);
        c.add(textname);
        c.add(textkey);
        c.add(name);
        c.add(login);
        c.add(key);
        c.add(ma);
        c.add(yama);
        c.add(textma);
        jf.setSize(400,300);
        jf.setLocationRelativeTo(null);
        jf.setLayout(null);
        jf.setDefaultCloseOperation(2);
        jf.setVisible(true);
    }
}