1 public class User {
2
3 private String name;
4 private String password;
5
6 public String getName() {
7 return name;
8 }
9
10 public void setName(String name) {
11 this.name = name;
12 }
13
14 public String getPassword() {
15 return password;
16 }
17
18 public void setPassword(String password) {
19 this.password = password;
20 }
21
22 public User() {
23
24 }
25
26 public User(String name, String password) {
27 this.name = name;
28 this.password = password;
29 }
30 }
//登录
public static int isLogin(ArrayList<User> user) {
if(user.size() == 0) {
System.out.println("当前没有用户，登录失败！");
System.exit(0);
}
Scanner sc = new Scanner(System.in);
System.out.println("输入用户名：");
String name = sc.next();
System.out.println("输入密码：");
String password = sc.next();
boolean isLogin = false;
Iterator it = user.iterator();
while(it.hasNext()) {
User u = (User)it.next();
if(u.getName().equals(name) && u.getPassword().equals(password)) {
isLogin = true;
}
if(isLogin == true) {
System.out.println("登录成功！");
}else {
System.out.println("用户名或密码输入有误，请重新输入！");
}
}
return 0;
}
//注册
public static void addUser(ArrayList<User> user) {
Scanner sc = new Scanner(System.in);
System.out.println("输入用户名：");
String name = sc.next();
System.out.println("输入密码：");
String password = sc.next();
User u = new User(name,password);
user.add(u);
System.out.println("注册成功！");
}
//查看
public static void queryUser(ArrayList<User> user) {
if(user.size() == 0) {
System.out.println("没有管理员账户，请添加用户后查询！");
return;
}
System.out.println("序号\t用户名\t密码");
for(int i = 0; i < user.size(); i++) {
User u = user.get(i);
System.out.println(i+"\t"+u.getName()+ "\t" + u.getPassword());
}
}
//修改
public static void updateUser(ArrayList<User> user) {
queryUser(user);
Scanner sc = new Scanner(System.in);
System.out.println("输入要修改的用户序号：");
int sum = sc.nextInt();
if(sum > user.size()) {
System.out.println("输入有误！");
return;
}
System.out.println("输入新的用户名：");
String name = sc.next();
System.out.println("输入新的密码：");
String password = sc.next();
User u = new User(name,password);
user.set(sum, u);
System.out.println("修改成功");
}
//删除
public static void deleteUser(ArrayList<User> user) {
queryUser(user);
Scanner sc = new Scanner(System.in);
System.out.println("输入要删除的用户序号：");
int sum = sc.nextInt();
user.remove(sum);
System.out.println("删除成功！");
}
}