Spring Boot · question
Question 4 of 74
What is the difference between @Component, @Service, @Repository, and @Controller?
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Re-explain
All are specializations of @Component for specific layers:
- @Component: Generic stereotype for any Spring-managed component
- @Service: Business logic layer components
- @Repository: Data access layer components (adds exception translation)
- @Controller: Presentation layer components for handling HTTP requests
@Service
public class UserService { }
@Repository
public class UserRepository { }
@Controller
public class UserController { }
Functionally similar, but provide better semantic meaning and potential for additional features.
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