Spring Framework FAQ: Top Questions
8. What is the use of @Component, @Controller, @Service, and @Repository in Spring?
These annotations are used to mark classes as Spring-managed components with semantic meaning for different application layers.
📘 Roles:
@Component: Generic stereotype for any Spring-managed component.@Controller: Marks a web controller for Spring MVC.@Service: Denotes business logic/service classes.@Repository: For DAO/persistence layer and exception translation.
🏆 Expected Output:
Classes are auto-detected and registered as beans.🛠️ Use Cases:
- Organizing application layers clearly.
- Support for stereotype-based component scanning.