模拟用户登录效果

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package sun.rain.amazing;import java.util.ArrayList;import java.util.List;import java.util.Scanner;import org.junit.Test;/** * 模拟用户登录 * @author sunRainAmazing *  */public class StringLogin {    public static User[] userArray;    public static List<User> userList = new ArrayList<User>();    //初始化数据    static{        userArray = new User[]{                new User("TOM","123"),                new User("CAT","123"),                new User("JANE","123")        };        userList.add(new User("tom","123"));        userList.add(new User("cat","123"));        userList.add(new User("jane","123"));    }    /**     * 测试登录方法     */    @SuppressWarnings("resource")    @Test    public void testLogin(){        Scanner scanner = new Scanner(System.in);        String userName,userPassword,code;        userName = userPassword = code = null;        String verifyCode ;        User user;        do{            if(userName!=null){                System.out.println("用户名或密码错误,请重新输入");            }            //获取一个四位数字的验证码            verifyCode = ((int)(Math.random()*9000)+1000)+"";            System.out.print("请输入用户名");            userName = scanner.nextLine().trim();            System.out.print("\n请输入密码：");            userPassword = scanner.nextLine().trim();            System.out.println("请输入验证码："+verifyCode);            code = scanner.nextLine().trim();            //进行封装 用户信息            user = new User(userName,userPassword);            //判断验证码是否正确            while(!verifyCode.equals(code)){                verifyCode = ((int)(Math.random()*9000)+1000)+"";                System.out.println("验证码不正确，请重新输入：  "+verifyCode);                code = scanner.nextLine().trim();            }//      }while(isExists(userName,userPassword));        }while(isExists(user));        System.out.println("欢迎您"+userName+"   登录成功");    }    /**     * 验证用户是否存在 数组方式     * @param userName     * @param userPassword     * @return     */    @SuppressWarnings("unused")    private static boolean isExists(String userName,String userPassword){        for (int i = 0; i < userArray.length; i++) {            if(userArray[i].getUserName().equals(userName)                    &&userArray[i].getUserPassword().equals(userPassword)                    ){                return false;            }        }        return true;    }    /**     * 验证用户是否存在 集合方式     * @param userName     * @param userPassword     * @return     */    private static boolean isExists(User user){        for (int i = 0; i < userList.size(); i++) {            if(userList.get(i).getUserName().equals(user.getUserName())                    &&userArray[i].getUserPassword().equals(user.getUserPassword())                    ){                return false;            }        }        return true;    }}/** * 创建的user类 * * @author sunRainAmazing * */class User{    private String userName;    private String userPassword;    public String getUserName() {        return userName;    }    public void setUserName(String userName) {        this.userName = userName;    }    public String getUserPassword() {        return userPassword;    }    public void setUserPassword(String userPassword) {        this.userPassword = userPassword;    }    public User() {        super();    }    public User(String userName, String userPassword) {        super();        this.userName = userName;        this.userPassword = userPassword;    }}
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