What is the difference between @SpringBootConfiguration vs @Configuration?

Question

What is the difference between @SpringBootConfiguration and @Configuration? I cannot find much details on it.

Answer 1

As per Springboot docs (hierarchy below), @Configuration is a part of @SpringBootConfiguration which ultimately has @SpringBootApplication annotation.

@SpringBootApplication
-------> @SpringBootConfiguration
       -------> @Configuration

---

@SpringBootApplication

Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@SpringBootConfiguration
@EnableAutoConfiguration
@ComponentScan(excludeFilters = {
        @Filter(type = FilterType.CUSTOM, classes = TypeExcludeFilter.class),
        @Filter(type = FilterType.CUSTOM,
                classes = AutoConfigurationExcludeFilter.class) })
public @interface SpringBootApplication {
...}

@SpringBootConfiguration

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Configuration
public @interface SpringBootConfiguration {

}

@Configuration

    @Target(ElementType.TYPE)
    @Retention(RetentionPolicy.RUNTIME)
    @Documented
    @Component
    public @interface Configuration {
}