Spring Framework FAQ: Top Questions

14. What is the role of @Configuration and @Bean annotations?

@Configuration indicates that a class declares one or more @Bean methods. These methods are used to define beans for the Spring context programmatically.

📘 Behavior:

@Configuration classes are processed like XML config files.
@Bean methods are invoked by the container, not by user code.

📥 Example:

@Configuration
public class AppConfig {

  @Bean
  public MyService myService() {
    return new MyServiceImpl();
  }
}

🏆 Expected Output:

Spring registers MyServiceImpl as a bean in the application context.

🛠️ Use Cases:

Programmatic configuration for complex setups.
Combining with conditional logic or dynamic creation.

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