I've used it in Spring to annotate interfaces where the annotation should apply to all subclasses. For example, say you have a Service interface and you might have multiple implementations of the interface but you want a security annotation to apply regardless of the annotation. In that case, it makes the most sense to annotate the interface.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…