Implementing DELETE Method to Delete a User Resource

To implement the DELETE method to delete a user resource in a Spring Boot application, you can follow these steps:

1. Create a Controller:
   Create a controller class that handles the RESTful endpoints for managing users. Inject the UserService (assuming you have a service layer) to handle the deletion logic.

@RestController
@RequestMapping("/users")
public class UserController {

    @Autowired
    private UserService userService;

    // Other methods for getting, creating, and updating users

    @DeleteMapping("/{userId}")
    public ResponseEntity<Void> deleteUser(@PathVariable Long userId) {
        boolean deleted = userService.deleteUser(userId);

        if (deleted) {
            return ResponseEntity.noContent().build();
        } else {
            return ResponseEntity.notFound().build();
        }
    }
}

2. Create a Service:
   Create a service class to handle the business logic for deleting users. Inject the UserRepository to interact with the database.

@Service
public class UserService {

    @Autowired
    private UserRepository userRepository;

    public boolean deleteUser(Long userId) {
        Optional<User> user = userRepository.findById(userId);

        if (user.isPresent()) {
            userRepository.delete(user.get());
            return true;
        } else {
            return false;
        }
    }

    // Other methods for getting, creating, and updating users
}

3. Testing:
   You can now test the DELETE endpoint by sending a DELETE request to the URL pattern /users/{userId}. For example, using curl:

   curl -X DELETE http://localhost:8080/users/1

This would delete the user with ID 1.

Remember to handle proper error cases, validation, and security considerations based on your application’s requirements. In the code above, a boolean is returned from the deleteUser method to indicate whether the deletion was successful. You can adjust this approach to return more detailed responses as needed.