java - 由于服务类错误，Spring Boot 应用程序未启动

Question

我正在创建一个 Spring Boot 应用程序以将数据插入 H2 DB。但应用程序没有自行启动。我收到一些 bean 错误。我是创建 Spring 应用程序的新手，无法解决此错误。

我创建了模型类，如下所示

@Entity
@Table(name = "DEPENDENCY_ANYWHERE")
public class DepedencyAnywhere implements Serializable{

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(name = "PACKAGE")
    private Long packageId;

    @Column(name = "DEPENDENT_PACKAGE")
    private Long depedencyPackageId;

    public DepedencyAnywhere() {
    }

    /**
     * @return the packageId
     */
    public Long getPackageId() {
        return packageId;
    }

    /**
     * @return the depedencyPackageId
     */
    public Long getDepedencyPackageId() {
        return depedencyPackageId;
    }

}

Dao类如下图

@Repository
public class DependencyAnywhereDao {

    @PersistenceContext
    private EntityManager em;


    public void add(DepedencyAnywhere depedentPackages) {
        em.persist(depedentPackages);

    }

    public DepedencyAnywhere getDepedendentPackage(Long packageId) {
        return em.find(DepedencyAnywhere.class, packageId);
    }

}

我创建了如下所示的服务类

@Service
@Transactional
public class DependencyAnywhereService {

    @Autowired
    private DependencyAnywhereDao dependencyAnywhereDao;

    public void add(DepedencyAnywhere depedentPackage) {
        dependencyAnywhereDao.add(depedentPackage); 
    }

}

这是我的 Controller 类

@RestController
@EnableAutoConfiguration
public class APIRestController {

    @Autowired
    DependencyAnywhereService dependencyAnywhereService;

    @RequestMapping("/insert")
    public String insert() {
        DepedencyAnywhere dependencyAnywhere = new DepedencyAnywhere();
        dependencyAnywhereService.add(dependencyAnywhere);
        return "Success";
    }
}

此应用程序未启动，我收到类似错误

Field dependencyAnywhereService in com.hpe.oss.installer.controller.APIRestController required a bean of type 'com.hpe.oss.installer.service.DependencyAnywhereService' that could not be found. Where I am going wrong? Is this some configuration issue?

Answer 1

@EnableAutoConfiguration 正在扫描您位于 Controller 下的 spring 组件的包，可能您的 Controller 不在根包中，因此上下文包含可能只是看不到组件(服务和存储库)。您应该在包的根目录中找到注释。