Student.zip

package Student; import java.util.ArrayList; import java.util.Random; import java.util.Scanner; public class studentManageTest { public static void main(String[] args) { /* 为学生管理系统书写一个登陆、注册、忘记密码的功能。 只有用户登录成功之后，才能进入到学生管理系统中进行增删改查操作。*/ ArrayList<User> list_1 = new ArrayList<>(); Scanner sc = new Scanner(System.in); loop: while (true) { System.out.println("-----------欢迎来到皮皮虾系统注册界面-----------"); System.out.println("1.登录"); System.out.println("2.注册"); System.out.println("3.忘记密码"); System.out.println("4.退出"); System.out.println("5.查询用户");//程序员要求加上的 System.out.println("请选择操作:"); String input = sc.nextLine(); switch (input) { case "登录" -> { if(login(list_1)){ studentManage(); break loop; }else { System.out.println("登录失败"); } } // 登录方法 case "注册" -> register(list_1); case "忘记密码" -> forgetPassWord(list_1); case "查询用户" -> queryDataBase(list_1); case "退出" -> { break loop; } default -> System.out.println("无对应操作,请重试"); } } }//main方法 , 主入口 public static void forgetPassWord(ArrayList<User> list){ //忘记密码方法 Scanner sc = new Scanner(System.in); System.out.println("请输入用户名"); String name = sc.nextLine(); int index = Index(name, list); if(index >= 0){ System.out.println("请输入身份证号"); String idNumber = sc.nextLine(); System.out.println("请输入手机号码"); String phoneNumber = sc.nextLine(); if(list.get(index).getIdNumber().equals(idNumber) && list.get(index).getPhoneNumber().equals(phoneNumber)){ System.out.println("输入新密码"); list.get(index).setPassword(getPassword()); System.out.println("更改密码成功"); }else { System.out.println("抱歉,身份证和手机号不一致"); } }else { System.out.println("抱歉,您未注册"); } }//忘记密码方法 public static boolean login(ArrayList<User> list) { //登录总方法 Scanner sc = new Scanner(System.in); while (true) { System.out.println("请输入用户名"); String userName = sc.nextLine(); int index = Index(userName, list); if (index >= 0) { String authCode = authCode(); System.out.println(authCode); System.out.println("请输入验证码"); String inputAuthCode = sc.nextLine(); if (inputAuthCode.equals(authCode)) { for (int i = 3; i > 0; ) { System.out.println("请输入密码"); String password = sc.nextLine(); if (list.get(index).getPassword().equals(password)) { System.out.println("登录成功"); return true; }else { i--; if(i == 0){ System.out.println("失败次数过多, 账户" + userName + "已锁定"); return false; }else { System.out.println("抱歉,密码错误,你还剩下" + i + "次机会"); } } } } else { System.out.println("验证码输入错误"); } } else { System.out.println("抱歉,您未注册"); return false; } } }//登录总方法 public static String authCode() { ArrayList<Character> list = new ArrayList<>(); Random r = new Random(); list_1(list); StringBuilder authCode = new StringBuilder(); for (int i = 0; i < 4; i++) { int random = r.nextInt(list.size()); authCode.append(list.get(random)); } int number = r.nextInt(10); char[] arr = authCode.append(number).toString().toCharArray(); int random = r.nextInt(arr.length); char temp = arr[random]; arr[random] = arr[arr.length - 1]; arr[arr.length - 1] = temp; return new String(arr); }//验证码 public static void list_1(ArrayList<Character> list) { for (int i = 0 ; i < 26 ; i++) { list.add((char)('a' + i)); list.add((char)('A' + i)); } }//录入'a' - 'z'和'A' - 'Z' public static int Index(String name, ArrayList<User> list) { for (int i = 0; i < list.size(); i++) { User u = list.get(i); if (u.getUserName().equals(name)) { return i; } } return -1; }//判断用户名是否存在 public static void register(ArrayList<User> list) { Scanner sc = new Scanner(System.in); //注册方法(register)注册 User u = new User(); u.setUserName(getUserName(list)); u.setPassword(getPassword()); u.setIdNumber(getIdNumber()); u.setPhoneNumber(getPhoneNumber()); String authCode = authCode(); System.out.println(authCode); System.out.println("请输入验证码确认你不是机器人"); String inputAuthCode = sc.nextLine(); if(inputAuthCode.equals(authCode)) { System.out.println("注册成功!"); list.add(u); }else { System.out.println("验证码输入错误,返回界面"); } }//注册总方法 public static String getUserName(ArrayList<User> list) { Scanner sc = new Scanner(System.in); while (true) { System.out.println("请录入用户名"); String userName = sc.nextLine(); int len = userName.length(); if (len >= 3 && len <= 15) { //不要写成userName.length() >= 3,因为调用两次方法 if (determineInput(userName)) { //用户名字母+数字的判断 //浪费资源的操作要放在最后面 if (userNameUnique(list, userName)) { //用户名唯一判断 System.out.println("用户名:" + userName + "可用" ); return userName; } else { System.out.println("用户名重复,请重新输入"); } } else { System.out.println("用户名输入不规范,应是只能是字母加数字的组合，但是不能是纯数字,也不能是纯英文"); } } else { System.out.println("字符串长度错误(长度需要大于等于3,小于等于15"); } } }//获取用户名 public static boolean userNameUnique(ArrayList<User> list, String userName) { //用户名唯一 for (int i = 0; i < list.size(); i++) { String name = list.get(i).getUserName(); if (name.equals(userName)) { return false; } } return true; }//用户名唯一 public static boolean determineInput(String userName) { //判断除了大写小写字母以及数字后是否还有其他 for (int i = 0; i < userName.length(); i++) { char c = userName.charAt(i); if (!((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '