Qualifiers also apply to typed collections, as discussed above, for example, to Set<MovieCatalog>. In this case, all matching beans according to the declared qualifiers are injected as a collection. This implies that qualifiers do not have to be unique; they rather simply constitute filtering criteria. For example, you can define multiple MovieCatalog beans with the same qualifier value "action"; all of which would be injected into a Set<MovieCatalog> annotated with @Qualifier("action").

Qualifiers name可以作为set集合的过滤条件