Is Autowired Annotation Deprecated in Spring Boot? Everything You Need to Know

No, @Autowired is not deprecated in Spring Boot! However, it has been optional since Spring 4.3. Learn why constructor injection is now the preferred approach and when you still need @Autowired.

📌 Is @Autowired Deprecated in Spring Boot?

No, @Autowired is NOT deprecated in Spring or Spring Boot. However, since Spring 4.3, it has been made optional if a class has only one constructor.

With Spring Boot 3+, the best practice is to use constructor injection without @Autowired, as Spring automatically injects dependencies when a bean has only one constructor.

🔹 What is @Autowired?

The @Autowired annotation is used in Spring to enable automatic dependency injection. It allows Spring to inject the required dependencies into a class automatically, without requiring manual object creation.

✅ Example: Using @Autowired to Inject Dependencies

@Service
public class ProductService {

    @Autowired
    private ProductRepository productRepository;

    public List<Product> getAllProducts() {
        return productRepository.findAll();
    }
}

💡 This tells Spring to automatically inject an instance of ProductRepository into ProductService.