Spring JPA Hibernate查询缓存不起作用

Question

我使用Spring Boot 1.4.1和spring-boot-starter-data-jpa

当查询我的自定义方法（例如'findByName（String name）'时，它不会被缓存。

但是当查询默认方法，例如'findOne（Interger id）'时，它是有效的。

application.properties：

spring.jpa.properties.hibernate.cache.use_query_cache=true

存储库：

@Repository
public interface AuthorRepository extends CrudRepository<Author, Integer> {
    Author findByName(String name);
}

测试：

public class RepositoryTests {
    @Autowired
    private AuthorRepository authorRepository;

    @Test
    @Transactional
    public void test() {
        authorRepository.save(new Author("admin"));

        // ***Not work. query **5** times.
        Author author = authorRepository.findByName("admin");
        author = authorRepository.findByName("admin");
        author = authorRepository.findByName("admin");
        author = authorRepository.findByName("admin");
        author = authorRepository.findByName("admin");

        // ***It's work. query **1** times.
        Author author = authorRepository.findOne(1);
        author = authorRepository.findOne(1);
        author = authorRepository.findOne(1);
        author = authorRepository.findOne(1);
        author = authorRepository.findOne(1);
    }
}

Answer 1

@Repository
public interface AuthorRepository extends CrudRepository<Author, Integer> {
    @QueryHints({ @QueryHint(name = "org.hibernate.cacheable", value ="true") })
    Author findByName(String name);
}

应该做到这一点。 （注意：不需要@Repository，因为您已经扩展了CrudRepository）