基于Spring Boot的教育平台设计与实现

由于原始代码已经是一个完整的Spring Boot项目，我们可以提取其中的核心部分，例如用户信息管理模块的核心接口和实现。以下是一个简化的用户信息管理模块的代码示例：

// UserController.java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
 
@RestController
@RequestMapping("/api/users")
public class UserController {
 
    private final UserService userService;
 
    @Autowired
    public UserController(UserService userService) {
        this.userService = userService;
    }
 
    @GetMapping
    public List<User> getAllUsers() {
        return userService.findAll();
    }
 
    @GetMapping("/{id}")
    public User getUserById(@PathVariable(value = "id") Long userId) {
        return userService.findById(userId);
    }
 
    @PostMapping
    public User createUser(@RequestBody User user) {
        return userService.save(user);
    }
 
    @PutMapping("/{id}")
    public User updateUser(@PathVariable(value = "id") Long userId, @RequestBody User userDetails) {
        return userService.update(userId, userDetails);
    }
 
    @DeleteMapping("/{id}")
    public String deleteUser(@PathVariable(value = "id") Long userId) {
        userService.deleteById(userId);
        return "User with id: " + userId + " deleted successfully!";
    }
}
 
// UserService.java
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
import java.util.Optional;
 
@Service
public class UserService {
 
    private final UserRepository userRepository;
 
    @Autowired
    public UserService(UserRepository userRepository) {
        this.userRepository = userRepository;
    }
 
    public List<User> findAll() {
        return userRepository.findAll();
    }
 
    public User findById(Long userId) {
        Optional<User> user = userRepository.findById(userId);
        return user.orElse(null);
    }
 
    public User save(User user) {
        return userRepository.save(user);
    }
 
    public User update(Long userId, User userDetails) {
        User user = findById(userId);
        if (user != null) {
            // 更新用户信息
            user.setName(userDetails.getName());
            user.setEmail(userDetails.getEmail());
            // ...其他属性
            return save(user);
        }
        return null;
    }
 
    public void deleteById(Long userId) {
        userRepository.deleteByI