lizihan-software-project/src/User.java

import java.util.ArrayList;
import java.util.Scanner;
import java.io.IOException;

public class User {
  String username;
  String password;
  String level;
  ArrayList<User> list1 = new ArrayList<>();
  int state = 1;

  public boolean logon() { //登录
    if (state == 1) {
      try {
        new ProcessBuilder("clear").inheritIO().start().waitFor();
      } catch (IOException | InterruptedException e) {
        //e.printStackTrace();
      }
      //            try {
      //                Runtime.getRuntime().exec("cmd /c cls").waitFor();
      //            } catch (IOException | InterruptedException e) {
      //                e.printStackTrace();
      //            }
      System.out.println("=== 中小学数学卷子自动生成程序 ===");
      System.out.println("请输入账户名称，密码:");
    }
    Scanner sc = new Scanner(System.in);
    String name = sc.next();
    String word = sc.next();
    for (int i = 0; i < list1.size(); i++) {
      if (name.equals(list1.get(i).username) && word.equals(list1.get(i).password)) {
        username = name;
        password = word;
        level = list1.get(i).level;
        state = 1;
        return true;
      }
    }
    System.out.println("请输入正确的用户名、密码");
    state = 0;
    return true;
  }

  public void start() {
    initializeUser();
    while (logon()) {
      if (state == 0) {
        continue;
      } else if (state == 1) {
        problem p1 = new problem();
        p1.start(this);
      }
    }
  }

  public User(String username, String password, String level) {
    this.username = username;
    this.password = password;
    this.level = level;
  }

  private void initializeUser() {
    list1.add(new User("张三1", "123", "小学"));
    list1.add(new User("张三2", "123", "小学"));
    list1.add(new User("张三3", "123", "小学"));
    list1.add(new User("李四1", "123", "初中"));
    list1.add(new User("李四2", "123", "初中"));
    list1.add(new User("李四3", "123", "初中"));
    list1.add(new User("王五1", "123", "高中"));
    list1.add(new User("王五2", "123", "高中"));
    list1.add(new User("王五3", "123", "高中"));
  }
}