无法在 Spring 数据存储库中创建自定义查询方法

Can't create custom query method in Spring Data Repository

我想创建自定义存储库:

public interface FriendRepositoryCustom {

    Page<Friend> findFriends(FriendCriteria friendCriteria, Pageable pageable);
}

及其实现:

@Repository
@Transactional(readOnly = true)
public class FriendRepositoryCustomImpl implements FriendRepositoryCustom {

    @PersistenceContext
    EntityManager entityManager;

    @Override
    public Page<Friend> findFriends(FriendCriteria friendCriteria, Pageable pageable) {
    ...
    }

并将其添加到主存储库:

@Repository
public interface FriendRepository extends JpaRepository<Friend, Long>, JpaSpecificationExecutor<Friend>, FriendRepositoryCustom {

}

当我启动应用程序时出现此错误:

Caused by: org.springframework.data.mapping.PropertyReferenceException: No property findFriends found for type Friend! at org.springframework.data.mapping.PropertyPath.(PropertyPath.java:77) at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:329) at org.springframework.data.mapping.PropertyPath.create(PropertyPath.java:309) at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:272) at org.springframework.data.mapping.PropertyPath.from(PropertyPath.java:243) at org.springframework.data.repository.query.parser.Part.(Part.java:76) at org.springframework.data.repository.query.parser.PartTree$OrPart.(PartTree.java:247) at org.springframework.data.repository.query.parser.PartTree$Predicate.buildTree(PartTree.java:398) at org.springframework.data.repository.query.parser.PartTree$Predicate.(PartTree.java:378) at org.springframework.data.repository.query.parser.PartTree.(PartTree.java:86) at org.springframework.data.jpa.repository.query.PartTreeJpaQuery.(PartTreeJpaQuery.java:70) ... 43 common frames omitted

您的实施命名可能 class 有误。

请注意,命名预期随 Spring Data 2.0 发生了变化。

对于 < 2.0,必须将实现命名为带有附加 Impl 后缀的最终存储库接口。 See the matching reference documentation for an example.

对于 >= 2.0,必须将实现命名为带有附加 Impl 后缀的自定义接口。 See the current reference documentation for an example.

注意:您不需要任何 @Repository 注释。