What Spring components and modules have you used in your projects?

In Spring projects, I used the following key components and modules:

• Spring Core — for dependency management through the IoC container and dependency injection (DI).
• Spring MVC — for building web applications using the Model-View-Controller pattern.
• Spring Data JPA — for simplifying database interactions and implementing repositories.
• Spring Boot — for rapid application development and minimal configuration.
• Spring Security — for implementing authentication and authorization.
• Spring AOP — for aspect-oriented programming, such as logging and transactions.

Example of using Spring Boot and Spring Data JPA:

@Entity
public class User {
    @Id
    @GeneratedValue
    private Long id;
    private String username;
    private String email;
    // getters and setters
}

public interface UserRepository extends JpaRepository<User, Long> {
    User findByUsername(String username);
}

@RestController
public class UserController {
    @Autowired
    private UserRepository userRepository;

    @GetMapping("/users/{username}")
    public User getUser(@PathVariable String username) {
        return userRepository.findByUsername(username);
    }
}