@Inherited 的作用

在注解上使用@Inherited 表示该注解会被子类继承，注意，仅针对类，成员属性、方法并不受此注释的影响。

对于类来说，子类要继承父类的注解需要该注解被 @Inherited 标识。
对于成员属性和方法来说，非重写的都会保持和父类一样的注解，而被实现的抽象方法，被重写的方法都不会有父类的注解。

Indicates that an annotation type is automatically inherited. If
an Inherited meta-annotation is present on an annotation type
declaration, and the user queries the annotation type on a class
declaration, and the class declaration has no annotation for this type,
then the class’s superclass will automatically be queried for the
annotation type. This process will be repeated until an annotation for this
type is found, or the top of the class hierarchy (Object)
is reached. If no superclass has an annotation for this type, then
the query will indicate that the class in question has no such annotation.

Note that this meta-annotation type has no effect if the annotated
type is used to annotate anything other than a class. Note also
that this meta-annotation only causes annotations to be inherited
from superclasses; annotations on implemented interfaces have no
effect.