Annotation - @Service

@Service
서비스 계층에서 사용되는 클래스임을 알림

public class UserService {
    
    @Autowired
    private UserRepository userRepository;
    
    public User getUserById(Long id) {
        return userRepository.findById(id).orElse(null);
    }
    
    public User saveUser(User user) {
        return userRepository.save(user);
    }
}

 

 

 

https://standout.tistory.com/477

Annotation - @Autowired @Qualifier