自定义JpaRepository未找到属性保存实体

Question

您需要创建一个通用的JpaRepository，以便处理系统进行的所有事务。在这里遵循这个示例。

它与实现有点不同，因为我的目标不是执行搜索，而是操作save方法。

@NoRepositoryBean
public interface GenericRepository<T, ID extends Serializable> extends JpaRepository<T, ID> {
    <S extends T> S saveEntity(S entity);
}

public class GenericRepositoryFactory extends JpaRepositoryFactory {

    /**
     * Creates a new {@link org.springframework.data.jpa.repository.support.JpaRepositoryFactory}.
     *
     * @param entityManager must not be {@literal null}
     */
    public GenericRepositoryFactory(EntityManager entityManager) {
        super(entityManager);
    }

    @Override
    protected Class<?> getRepositoryBaseClass(RepositoryMetadata metadata) {
        return GenericRepositoryImpl.class;
    }
}

public class GenericRepositoryFactoryBean<T extends JpaRepository<S, ID>, S, ID extends Serializable>
    extends JpaRepositoryFactoryBean<T, S, ID> {

    /**
     * Creates a new {@link JpaRepositoryFactoryBean} for the given repository interface.
     *
     * @param repositoryInterface must not be {@literal null}.
     */
    public GenericRepositoryFactoryBean(Class<? extends T> repositoryInterface) {
        super(repositoryInterface);
    }

    /**
     * Returns a {@link org.springframework.data.repository.core.support.RepositoryFactorySupport}.
     *
     * @param entityManager
     * @return
     */
    protected RepositoryFactorySupport createRepositoryFactory(EntityManager entityManager) {
        return new GenericRepositoryFactory(entityManager);
    }
}

public class GenericRepositoryImpl<T, ID extends Serializable> extends SimpleJpaRepository<T, ID> implements GenericRepository<T, ID> {

    private JpaEntityInformation<T, Serializable> entityInformation;
    private final EntityManager entityManager;

    public GenericRepositoryImpl(JpaEntityInformation<T, Serializable> entityInformation, EntityManager entityManager) {
        super(entityInformation, entityManager);
        this.entityInformation = entityInformation;
        this.entityManager = entityManager;
    }


    @Override
    public T saveEntity(Object entity) {
        //here custom code...
        return null;
    }
}

public interface SistemaMenuRepository extends GenericRepository<SistemaMenu, Integer> {
}

@Service
public class SistemaMenuService {
    @Autowired
    SistemaMenuRepository sistemaMenuRepository;
}

unsatisfiedDependencyException：创建名为“sistema menuservice”的bean时出错：通过字段“sistema menurepository”表示未满足的依赖关系；嵌套异常是org.springframework.beans.factory.beanCreationException：创建名为'sistema menurepository'的bean时出错：调用init方法失败；嵌套异常是org.springframework.data.mapping.PropertyReferenceException：没有找到类型sistemamenu的属性保存实体！

欢迎任何帮助！

Answer 1

正如Jens所建议的，您需要指定您的自定义存储库工厂bean类。

@Configuration
@EnableJpaRepositories( basePackages = "repository.packagename",
                        entityManagerFactoryRef = "entityManagerFactory",
                        transactionManagerRef = "transactionManager",
                        repositoryFactoryBeanClass = GenericRepositoryFactoryBean.class)
@EnableTransactionManagement
public class JpaConfiguration {
...
}