"Spring 中的@Repository 和@RepositoryDe​​finition 有什么区别？"

Question

I'd want to know the difference between @Repository and @RepositoryDefinition in Spring. And which would take in effect with @EnableNeo4jRepositories ?

Answer 1

I can't answer in regard to Neo4j, but deciding between the two Spring annotations is a design decision. I'll quote from the official documentation :

Typically, your repository interface will extend Repository , CrudRepository or PagingAndSortingRepository . Alternatively, if you do not want to extend Spring Data interfaces, you can also annotate your repository interface with @RepositoryDefinition .

The API doc is even more clear:

Annotating an interface with RepositoryDefinition will cause the same behaviour as extending Repository .

You might be interested in Using @RepositoryDefinition and JpaSpecificationExecutor methods doesn't work too.

Answer 2

@Repository is an annotation that tells spring to create a Bean, hence, it needs to be put on a Class. It similar to @Service or @RestController but with some peculiarities regarding the Transactional behaviour and exception handling (annotated classes can be chosen for PersistenceExceptionTranslationPostProcessor). It can be seen as specialization of @Component