Could you explain the differences between the annotations @Repository, @Service, and @Controller in the context of Spring?
sobes.tech AI
Answer from AI
In Spring, the annotations @Repository, @Service, and @Controller are used to denote different layers of the application and help the framework manage components:
-
@Repository — marks a class responsible for database operations (DAO layer). Spring also handles database-related exceptions and translates them into its own exceptions.
-
@Service — indicates the service layer, where the application's business logic is implemented. It is an intermediate layer between controllers and repositories.
-
@Controller — used for classes that handle HTTP requests and return responses (usually in web applications). In MVC architecture, this is the view layer.
Thus, these annotations help structure the application and provide automatic component management by Spring.