用户登入注册，要求输错3次后15秒内不能进行登入操作

package jul29.huiyuanguanli;

import java.util.*;

//会员类
class User {
    private String name;
    private String code;

    public User() {
    }

    public User(String name, String code) {
        this.name = name;
        this.code = code;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

}

//会员注册
public class Demo01 {
    static Scanner input = new Scanner ( System.in );
    //储存会员类
    static Map<String, User> map = new HashMap<> ();

    static long time1 = 0;//输入错误3次的时间
    static long tiem2 = 0;//输入密码时间
    static int num;//输错密码的次数
    static final long time = 15;//锁死账号的时间

    //注册
    public static void zc() {
        System.out.println ( "请输入用户名：" );
        String name;
        for (name = input.next (); name.length () < 3; name = input.next ()) {
            System.out.println ( "用户名长度不能小于三位，请重新输入：" );
        }
        System.out.println ( "请输入注册密码：" );
        String code;
        for (code = input.next (); code.length () < 6; code = input.next ()) {
            System.out.println ( "密码长度不能小于6位，请重新输入：" );
        }
        System.out.println ( "注册成功！" );
        //存储会员
        map.put ( name, new User ( name, code ) );
    }

    //登入
    public static void dr() {
        tiem2 = new Date ().getTime ();

        //先判断输错次数,再判断时间是否还在锁死时间内,最后就剩被已锁死状态
        if (num < 3) {
            //输对登入成功，输错则次数+1
            if (boo ()) {
                System.out.println ( "登入成功！" );
            } else {
                num++;
                System.out.println ( "密码输入错误,您当前已输错" + num+"次，输错3次将暂时不能登入！" );
                //输错3次,记录当时的时间
                if (num == 3) {
                    time1 = new Date ().getTime ();
                }
            }
        } else if ((tiem2 - time1) / 1000 > time) {
            //时间已过，清除输错次数
            num = 0;
            if (boo ()) {
                System.out.println ( "登入成功！" );
            } else {
                num++;
                System.out.println ( "密码输入错误,您当前已输错\"+num\"次，输错3次将暂时不能登入！" );
            }
        } else {
            System.out.println ( "您已输错3次，请" + (time - (tiem2 - time1) / 1000) + "秒后重试" );
        }

    }

    //判断是否输入正确
    public static boolean boo() {
        System.out.println ( "请输入账号：" );
        String name = input.next ();
        System.out.println ( "请输入密码：" );
        String code = input.next ();
        if (map.get ( name ) != null) {
            if (name.equals ( map.get ( name ).getName () ) && code.equals ( map.get ( name ).getCode () )) {
                return true;
            } else {
                return false;
            }
        } else {
            return false;
        }
    }

    //运行
    public static void main(String[] args) {
        String s = "";
        System.out.println ( "1、登入   2、注册\n请选择：" );
        for (s = input.next (); s.equals ( "1" ) || s.equals ( "2" ); s = input.next ()) {
            switch (s) {
                case "1":
                    dr ();
                    break;
                case "2":
                    zc ();
                    break;
            }
            System.out.println ( "1、登入   2、注册\n请选择：" );
        }

    }

}

用户类，注册、登入功能，运行系统

 

输错3次且已过15秒效果