【0729作业】会员注册

1、注册和登录功能，使用已知的帐号和密码可以直接登录，如果没有帐号，注册后可以用刚注册的帐号登录

2、注册的时候，如果帐号已经存在，不能注册

3、注册的时候，设置两次密码，如果两次密码设置得不同，不能注册

4、登录的时候，密码输错三次，锁定帐号

5、登录的时候，如果没有这个帐号，则提醒用户注册，注册后可以登录

6、登录的时候，帐号密码都正确要输入验证码，系统给出的验证码和用户输入一致时，允许登录（忽略大小写）

7、登录之后，用户可以看到用户的预留信息

package com.login3;

public class User {
    private String accounts;//登录账户
    private String password;//登录密码
    private String phone;//手机号
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    public String getAccounts() {
        return accounts;
    }
    public void setAccounts(String accounts) {
        this.accounts = accounts;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    
    public Login() {
        // TODO Auto-generated constructor stub
    
    }
    public Login(String accounts, String password, String phone) {
        super();
        this.accounts = accounts;
        this.password = password;
        this.phone = phone;
    }
}

package com.login3;

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

public class Login {
     static Map<String, User> map;
        //初始化用户信息
        static {
            map = new HashMap<>();
            User user1 = new User("asd00000", "123456", "13900000000");
            User user2 = new User("qwe00000", "234567", "15900000000");
            User user3 = new User("zxc00000", "345678", "13800000000");

            map.put(user1.getAccounts(), user1);
            map.put(user2.getAccounts(), user2);
            map.put(user3.getAccounts(), user3);
        }
        
        //注册验证
        public boolean Judge(String account,String password,String password2) {
            Set<String> keys = map.keySet();
            for(String s:keys) {
                if(map.get(s).getAccounts().equals(account)) {
                    System.out.println("账户已存在，注册失败！");
                    return false;
                }
            }
            if(password.equals(password2)) {
                System.out.println("注册成功！");
                System.out.println("您的登录账户为：" + account + "，登录密码为：" + password );
            
                return true;
            }else {
                System.out.println("两次输入密码不一致，请重新输入！");
                return false;
            }
            
        }
        
        
        //登录验证
        public int login(String account,String password,String code,String userCode) {
            Set<String> keys = map.keySet();
            for(String s:keys) {
                if(map.get(s).getAccounts().equals(account)) {
                    int i = 1;
                    do{
                        if((map.get(s).getPassword().equals(password))) {
                            return verify(code,userCode);
                        }else {
                            if(i == 1) {
                                System.out.println("用户名或密码不正确！请重新输入(剩余两次机会)：");
                            }else {
                                System.out.println("用户名或密码不正确！请重新输入(剩余一次机会)：");
                            }
                            password = LoginSystem.sc.next();
                            System.out.println("请输入下方验证码(不区分大小写)：");
                            code = Login.getVerify(6);
                            System.out.println(code);
                            userCode = LoginSystem.sc.next();
                            if((map.get(s).getPassword().equals(password))) {
                                return verify(code,userCode);
                            }
                            i++;
                        }
                        if(i>=3) {
                            System.out.println("连续三次输入密码错误，登录失败！！");
                            return 0;
                        }
                    }while(true);
                }
            }
            System.out.println("用户不存在，请重试输入！");
            return 2;
        }
        
        //生成验证码
        public static String getVerify(int length){
            String code = "";
            String str = "0123456789qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASFGHJKLZXCVBNM";
            String[] strs = str.split("");
            for(int i = 0;i<length;i++){
                code += strs[(int)(Math.random()*strs.length)];
            }
            return code;
        }
        
        //校验验证码
        public static int verify(String code,String userCode) {
            do {
                if(code.equalsIgnoreCase(userCode)) {
                    System.out.println("登录成功！!正在加载系统...");
                    return 0;
                }else {
                    System.out.println("验证码错误，请重新输入：");
                    code = getVerify(6);
                    System.out.println(code);
                    userCode = LoginSystem.sc.next();
                }    
            }while(true);
        }
}

package com.login3;

import java.util.Scanner;

public class LoginSystem {
    static Scanner sc = new Scanner(System.in);
    Login login = new Login();
    boolean flag;

    public static void main(String[] args) {
        Out: do {
            LoginSystem login = new LoginSystem();
            System.out.println("***欢迎进入系统大厅***");
            System.out.println("请选择：1、登录 2、注册、3、退出系统");
            int i = sc.nextInt();
            switch (i) {
            case 1:
                login.userLogin();
                break Out;
            case 2:
                login.adduUser();
                break;
            default:
                break Out;
            }
        } while (true);
    }

    // 注册
    public void adduUser() {

        do {
            System.out.println("请输入注册账号：");
            String account = sc.next();
            System.out.println("请输入注册密码：");
            String password = sc.next();
            System.out.println("请再次输入密码：");
            String password2 = sc.next();
            if ((password.length() < 3) || (password.length() < 6)) {
                System.out.println("用户名长度不能小于3，密码长度不能小于6！");
                flag = false;
            } else {
                flag = login.Judge(account, password, password2);
                if (flag) {
                    Login.map.put(account, new User(account, password, password2));
                }
            }
        } while (!flag);

    }

    // 登录
    public void userLogin() {
        int i = -1;
        Out: do {
            System.out.print("请输入登录账户:");
            String account = sc.next();
            System.out.print("请输入登录密码：");
            String password = sc.next();
            System.out.println("请输入下方验证码(不区分大小写)：");
            String code = Login.getVerify(6);
            System.out.println(code);
            String userCode = sc.next();
            i = login.login(account, password, code, userCode);
            if (i == 0) {
                break Out;
            }
        } while (i == 2);

    }
}

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