spring - Spring中的@Configuration和@Component有什么区别？

Question

@ComponentScan 使用 @Configuration 和 @Component 创建 bean。交换时，这两个注释都可以正常工作。那有什么区别呢？

Answer 1

@Configuration Indicates that a class declares one or more @Bean methods and may be processed by the Spring container to generate bean definitions and service requests for those beans at runtime

@Component Indicates that an annotated class is a "component". Such classes are considered as candidates for auto-detection when using annotation-based configuration and classpath scanning.

@Configuration is meta-annotated with @Component, therefore @Configuration classes are candidates for component scanning

你可以在这里看到更多:

http://docs.spring.io/spring-framework/docs/4.0.4.RELEASE/javadoc-api/org/springframework/context/annotation/Configuration.html

@Configuration 也是@Component，但@Component 不能像@Configuration 那样工作。