具有REST服務的Spring Boot JPA

Question

我知道有人問過這樣的問題（ 未找到處理程序方法 ），但是在嘗試了多種解決方案后，我仍然陷入困境。 所以我的問題是：我不能在項目中同時使用REST和JPA。 com.db.ruf：WRepository.class：

@NoRepositoryBean
@Component
public interface WRepository <T, ID extends Serializable>
        extends JpaRepository<T, ID> {
}

com.db.ruf：WRepositoryImpl.class：

public class WRepositoryImpl<T, ID extends Serializable>
        extends SimpleJpaRepository<T, ID> implements WRepository<T, ID> {

    private EntityManager entityManager;

    // There are two constructors to choose from, either can be used.
    public WRepositoryImpl(Class<T> domainClass, EntityManager entityManager) {
        super(domainClass, entityManager);

        // This is the recommended method for accessing inherited class dependencies.
        this.entityManager = entityManager;
    }
}

com.db：MyRepositoryFactoryBean.class

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

    protected RepositoryFactorySupport createRepositoryFactory(EntityManager entityManager) {

        return new MyRepositoryFactory(entityManager);
    }

    private static class MyRepositoryFactory<T, I extends Serializable> extends JpaRepositoryFactory {

        private EntityManager entityManager;

        public MyRepositoryFactory(EntityManager entityManager) {
            super(entityManager);

            this.entityManager = entityManager;
        }

        protected Object getTargetRepository(RepositoryMetadata metadata) {

            return new WRepositoryImpl<T, I>((Class<T>) metadata.getDomainType(), entityManager);
        }

        protected Class<?> getRepositoryBaseClass(RepositoryMetadata metadata) {

            // The RepositoryMetadata can be safely ignored, it is used by the JpaRepositoryFactory
            //to check for QueryDslJpaRepository's which is out of scope.
            return WRepository.class;
        }
    }
}

com.rest .： WebadminRESTController.class

@RestController
@Component

public class WebadminRESTController {

    @Autowired
   WRepository<ExternalLink, Long> wRepositoryImpl;

    @RequestMapping(value = "/allExternalLinks", method = RequestMethod.GET)
    public ResponseEntity<?> allExternalLinks() {
...
     }
}

com：

@SpringBootApplication
@EnableAutoConfiguration
@EnableJpaRepositories(basePackages = "com.db.ruf", repositoryFactoryBeanClass = MyRepositoryFactoryBean.class)
@ComponentScan(basePackages = "com", resourcePattern = "com.*")

@EntityScan({"com.db"})


public class WebadminApplication {

    public static void main(String[] args) {
        SpringApplication.run(WebadminApplication.class, args);
    }
}

在這種情況下，我得到：

找不到[/ allExternalLinks]的處理程序方法

如果我將@ComponentScan（basePackages =“ com”，resourcePattern =“ com。*”）更改為@ComponentScan（basePackages =“ com”）或@ComponentScan，則會得到：

由以下原因引起：org.springframework.beans.factory.NoSuchBeanDefinitionException：沒有類型為'com.db.ruf.WRepository'的合格Bean：期望至少有1個合格為自動裝配候選的Bean。 依賴項注釋：{@ org.springframework.beans.factory.annotation.Autowired（required = true）}

我真的不知道怎么了 有人能解釋嗎？ 先感謝您

Answer 1

使用@Repository對WRepositoryImpl.java 。 並編輯WebadminRESTController.java ：

@Autowired WRepositoryImpl<ExternalLink, Long> wRepositoryImpl;

Answer 2

偶然地我找到了解決方案（不要認為這是最好的解決方案，但至少可以奏效）：

public interface  ExternalLinksRepo extends  CrudRepository<ExternalLink, Long> {
...
}

和：

public class WebadminRESTController {

   @Autowired
   ExternalLinksRepo wRepositoryImpl;
...}

然后自動創建wRepositoryImpl作為WRepositoryImpl的實例

感謝所有人，尤其是Cepr0