Java小练习之利用面向对象写一个简单的登录系统

比眉伴天荒 2021-12-15 00:27 261阅读 0赞

import java.util.Scanner;
    /**
     * 采用面向对象的方式 写一个登录系统
     * @author Administrator
     *
     */
    
    //用户信息
    class UserInfo{
        public static String[] user = new String[10];
        public static String[] passwd = new String[10];
        
        public UserInfo() {
            this.user[0] = "test";
            this.passwd[0] ="123456";
            
        }
        
    }
    
    //找回密码
    class ZhaoHui extends UserInfo{
        public static void zhaohui() {
            Scanner s = new Scanner(System.in);
            System.out.println("请输入你要找回的用户名：");
            String zname = s.nextLine();
            for(int i=0;i<2;i++) {
                if(user[i].equals(zname)) {
                    Scanner ss = new Scanner(System.in);
                    System.out.println("恭喜你!成功找回密码，请输入："+"'张哥最帅'"+"  查看密码");
                    String zgzs = ss.nextLine();
                    
                    if("张哥最帅".equals(zgzs)) {
                        System.out.println(passwd[i]);
                    }else {
                        System.out.println("请输正确！");
                    }       
                }else if(user[i]!=zname){
                    System.out.println("用户名不存在！");
                    return;
                }   
                break;
            }
        }
    }
    //修改密码 
    class XiuGai extends UserInfo{
        public static void xiugai() {
            
            Scanner s =new Scanner(System.in);
            System.out.println("请输入您要修改的密码：");
            String xpasswd = s.nextLine();
            for(int i=0;i<2;i++) {
                passwd[i] = xpasswd;
                if(xpasswd.equals(passwd[i])) {
                    System.out.println("恭喜你，修改成功！");
                    break;
                }else {
                    System.out.println("修改密码失败");
                    break;
                }
            }
        }
    }
    
    //查询用户
    class ChaXun extends UserInfo{
        
        public static void select() {
            for(int i=0;i<2;i++) {
                System.out.println("当前用户："+user[i] +"\n"+ "当前密码："+passwd[i] );
                i++;
                break;
            }
        }
    }
    //注册
    class ZhuCe extends UserInfo{
        
        public static void regist() {
            Scanner ss = new Scanner(System.in);
            System.out.println("请输入用户名：");
            String suser = ss.nextLine();
            System.out.println("请输入密码：");
            String spasswd = ss.nextLine();
        
            for(int i=0;i<user.length;i++) {
            
                    user[i] = suser;
                    passwd[i] = spasswd;
                    System.out.println("注册成功!");
                    break;
            
            }
        }
    }
    
    //登录
    class Loginc extends UserInfo{
        
        public static void login() {
            int flag = 1;
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入用户名：");
            String users = scanner.nextLine();
            System.out.println("请输入密码：");
            String passwds = scanner.nextLine();
            
            for(int i=0;i<UserInfo.user.length;i++) {
                if(user[i].equals(users) && passwd[i].equals(passwds)) {
                    System.out.println("登陆成功！");
                    break;
                }
                System.out.println("登陆失败！");
                break;
            }
            
        }
    }
    
    
    //主界面
    class ZhuJieMian{
        public static void Start() {
            Loginc Loginc = new Loginc();
            ZhuCe ZhuCe = new ZhuCe();
            ChaXun ChaXun = new ChaXun();
            XiuGai XiuGai = new XiuGai();
            ZhaoHui ZhaoHui = new ZhaoHui();
            
            Scanner s = new Scanner(System.in);
            while(true) {
                System.out.println("|"+ "\t"+ "\t"+ "\t"+ "\t"+ "\t"+ "\t"+ "\t"+"\t"+"|");
                System.out.println("|"+"\t" + "测试用户名:test 测试密码:123456" + "\t"+ "\t"+ "\t"+ "\t"+"|");
                System.out.println("|" + "\t"+ "请输入[1-5]进行操作 1.登录|2.注册|3.查询当前用户|4.修改密码|5.找回密码 " + "\t"+"|");
                System.out.print("请输入:");
                int temp = s.nextInt();
            
                switch(temp) {
                case 1:Loginc.login();
                break;
                case 2:ZhuCe.regist();;
                break;
                case 3:ChaXun.select();;
                break;
                case 4:XiuGai.xiugai();;
                break;
                case 5:ZhaoHui.zhaohui();;
                break;
                default:System.out.println("错误！请重写输入正确的数字进行操作！");
            
                }
            }
        }
        
    }
    
    public class LoginTest {
        public static void main(String[] args) {
            ZhuJieMian zjm = new ZhuJieMian();
            zjm.Start();
            
            
        }
        
    }

运行结果：  
![1681999-20190527113256440-921830043.jpg][]

转载于:https://www.cnblogs.com/blogzcc/p/10929815.html

[1681999-20190527113256440-921830043.jpg]: /images/20211214/21f9d25ca6064408b60e89a1bcdc0e13.png