从抽象类继承注释？ [英] Inherit annotations from abstract class?

问题描述

我可以以某种方式在抽象类上对一组注释进行分组，并且扩展此类的每个类都自动分配了这些注释吗？

Can I somehow group a set of annotations on an abstract class, and every class that extends this class has automatically assigned these annotations?

至少以下内容不是work：

At least the following does not work:

@Service
@Scope(value = BeanDefinition.SCOPE_PROTOTYPE)
class AbstractService


class PersonService extends AbstractService {
    @Autowired //will not work due to missing qualifier annotation
    private PersonDao dao;
}

推荐答案

答案是：no

除非注释类型上有@Inherited元注释，否则不会继承Java注释： https://docs.oracle.com/javase/7/docs/api/java/lang /annotation/Inherited.html 。

Java annotations are not inherited unless the annotation type has the @Inherited meta-annotation on it: https://docs.oracle.com/javase/7/docs/api/java/lang/annotation/Inherited.html.

Spring的 @Component 注释上没有@Inherited ，所以你需要在每个组件类上放置注释。 @ Service，@ Controller和@Repository都没有。

Spring's @Component annotation does not have @Inherited on it, so you will need to put the annotation on each component class. @Service, @Controller and @Repository neither.

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