Update README.md

README.md

@@ -1 +1,214 @@
-# src
+import java.io.*;
+import java.util.ArrayList;
+import java.util.Scanner;
+
+// 用户类
+class User implements Serializable {
+    private static final long serialVersionUID = 1L;
+    private String username;
+    private String email;
+    private int age;
+    private String gender;
+
+    public User(String username, String email, int age, String gender) {
+        this.username = username;
+        this.email = email;
+        this.age = age;
+        this.gender = gender;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public String getGender() {
+        return gender;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public void setGender(String gender) {
+        this.gender = gender;
+    }
+
+    @Override
+    public String toString() {
+        return "Username: " + username + ", Email: " + email + ", Age: " + age + ", Gender: " + gender;
+    }
+}
+
+// 用户管理类
+class UserManager {
+    private ArrayList<User> userList;
+    private static final String FILE_NAME = "users.dat";
+
+    public UserManager() {
+        userList = readUsersFromFile();
+    }
+
+    // 从文件中读取用户信息
+    private ArrayList<User> readUsersFromFile() {
+        ArrayList<User> users = new ArrayList<>();
+        try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(FILE_NAME))) {
+            users = (ArrayList<User>) ois.readObject();
+        } catch (FileNotFoundException e) {
+            System.out.println("文件不存在，将创建新文件。");
+        } catch (IOException | ClassNotFoundException e) {
+            e.printStackTrace();
+        }
+        return users;
+    }
+
+    // 将用户信息写入文件
+    private void writeUsersToFile() {
+        try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(FILE_NAME))) {
+            oos.writeObject(userList);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    // 添加用户
+    public void addUser(User user) {
+        userList.add(user);
+        writeUsersToFile();
+    }
+
+    // 根据用户名查找用户
+    public User findUserByUsername(String username) {
+        for (User user : userList) {
+            if (user.getUsername().equals(username)) {
+                return user;
+            }
+        }
+        return null;
+    }
+
+    // 删除用户
+    public boolean removeUser(String username) {
+        User user = findUserByUsername(username);
+        if (user != null) {
+            userList.remove(user);
+            writeUsersToFile();
+            return true;
+        }
+        return false;
+    }
+
+    // 修改用户信息
+    public boolean modifyUserInfo(String username, String newEmail, int newAge, String newGender) {
+        User user = findUserByUsername(username);
+        if (user != null) {
+            user.setEmail(newEmail);
+            user.setAge(newAge);
+            user.setGender(newGender);
+            writeUsersToFile();
+            return true;
+        }
+        return false;
+    }
+}
+
+// 主程序
+public class yy1{
+    public static void main(String[] args) {
+        UserManager userManager = new UserManager();
+        Scanner scanner = new Scanner(System.in);
+
+        boolean running = true;
+        while (running) {
+            System.out.println("用户信息管理系统");
+            System.out.println("1. 添加用户");
+            System.out.println("2. 查找用户");
+            System.out.println("3. 删除用户");
+            System.out.println("4. 修改用户信息");
+            System.out.println("5. 退出");
+            System.out.print("请选择操作：");
+            int choice = scanner.nextInt();
+            scanner.nextLine(); // 清除输入缓冲区
+
+            switch (choice) {
+                case 1:
+                    System.out.print("请输入用户名：");
+                    String username = scanner.nextLine();
+                    System.out.print("请输入邮箱：");
+                    String email = scanner.nextLine();
+                    System.out.print("请输入年龄：");
+                    int age = scanner.nextInt();
+                    scanner.nextLine(); // 清除输入缓冲区
+                    System.out.print("请输入性别：");
+                    String gender = scanner.nextLine();
+                    User newUser = new User(username, email, age, gender);
+                    userManager.addUser(newUser);
+                    System.out.println("用户已添加！");
+                    break;
+                case 2:
+                    System.out.print("请输入要查找的用户名：");
+                    String searchUsername = scanner.nextLine();
+                    User foundUser = userManager.findUserByUsername(searchUsername);
+                    if (foundUser != null) {
+                        System.out.println("用户信息：");
+                        System.out.println(foundUser);
+                    } else {
+                        System.out.println("未找到用户！");
+                    }
+                    break;
+                case 3:
+                    System.out.print("请输入要删除的用户名：");
+                    String deleteUsername = scanner.nextLine();
+                    boolean removed = userManager.removeUser(deleteUsername);
+                    if (removed) {
+                        System.out.println("用户已删除！");
+                    } else {
+                        System.out.println("未找到用户！");
+                    }
+                    break;
+                case 4:
+                    System.out.print("请输入要修改信息的用户名：");
+                    String modifyUsername = scanner.nextLine();
+                    System.out.print("请输入新的邮箱：");
+                    String newEmail = scanner.nextLine();
+                    System.out.print("请输入新的年龄：");
+                    int newAge = scanner.nextInt();
+                    scanner.nextLine(); // 清除输入缓冲区
+                    System.out.print("请输入新的性别：");
+                    String newGender = scanner.nextLine();
+                    boolean modified = userManager.modifyUserInfo(modifyUsername, newEmail, newAge, newGender);
+                    if (modified) {
+                        System.out.println("用户信息已修改！");
+                    } else {
+                        System.out.println("未找到用户！");
+                    }
+                    break;
+                case 5:
+                    running = false;
+                    System.out.println("感谢使用，再见！");
+                    break;
+                default:
+                    System.out.println("无效的选项，请重新输入！");
+            }
+            System.out.println();
+        }
+
+        scanner.close();
+    }
+}
+