spring boot构造器自动连线异常

Question

我在我的spring boot应用（spring Hibernate/Data/JPA/Web）中有这个类：

pkg实体：

public interface Base {
// getter/setter methods
}

@MappedSuperclass
public abstract class AbsBase implements Base {
// common fields & getter/setter methods
}

@Entity(name = "Config")
@Table(name = "config")
public class Config extends AbsBase implements Base, Serializable {
  //additional fields & getter/setter methods
}

pkg存储库：

@NoRepositoryBean
public interface BaseRepository<T extends Base> extends JpaRepository<T, Integer> {}

@Repository
public interface ConfigRepository extends BaseRepository<Config> {
//Queries
}

pkg服务：

@Transactional
public interface BaseService<T extends Base> {

    @Transactional  void add(T obj);
    @Transactional  void edit(T obj);
    //Etc..
}

public abstract class AbsBaseService<T extends Base> implements BaseService<T> {

    private BaseRepository<T> repository;

    public AbsBaseService(BaseRepository<T> repository) {
        super();
        this.repository = repository;
    }

    @Override   public void add(T obj) { repository.save(obj); }
    @Override   public void edit(T obj) { repository.save(obj); }
    // Etc
}

@Service
public class ConfigService extends AbsBaseService<Config> implements BaseService<Config> {

    private ConfigRepository repository;

    @Autowired
    public ConfigService(ConfigRepository repository) {
        super(repository);
        this.repository = repository;
    }
    // Etc.
}

如果我不创建任何控制器，所有工作，但如果我创建一个控制器：

pkg控制器：

public interface BaseController<T extends Base> { // methods }

public abstract class AbsBaseController<T extends Base> implements BaseController<T> {

    private BaseService<T> service;

    public AbsBaseController(BaseService<T> service) {
        this.service = service;
    }

@Override
@RequestMapping(value = "/Add", method = RequestMethod.POST)
public String addAction(@ModelAttribute("entity") T entity, BindingResult result, Model model,
        final RedirectAttributes redirectAttributes) {

    service.add(entity, result);
    if (result.hasErrors()) {
        return addUrl;
    }
}

@Controller
public class ConfigController extends AbsBaseController<Config> implements BaseController<Config> {

    private ConfigService configService;

    @Autowired
    public ConfigController(ConfigService configService) {
        super(configService);
        this.configService = configService;
    }
}

我得到这个错误（ConfigController中的autowired ConfigService错误）：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'configControllerImpl' defined in file [C:\workspace-sts\prueba_boot_thymeleaf\target\classes\prueba\controller\config\ConfigControllerImpl.class]: Unsatisfied dependency expressed through constructor argument with index 0 of type [prueba.service.config.ConfigServiceImpl]: No qualifying bean of type [prueba.service.config.ConfigServiceImpl] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [prueba.service.config.ConfigServiceImpl] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:749) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:185) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1143) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1046) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1191) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
    at prueba.BootThymeleafApplication.main(BootThymeleafApplication.java:12) [classes/:na]
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [prueba.service.config.ConfigServiceImpl] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1373) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1119) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
    ... 19 common frames omitted

第一个问题是：我已经注释了@Transaction的BaseService接口及其方法。是正确的？在AbsBaseService课上更好？

我看到configService构造函数在异常之前执行。为什么不自动布线？

我需要构造函数@AutoWired，因为我在抽象/超类、泛型服务/控制器中实现了通用方法。

继承树:absBaseXxxx-->absBaseCodeNameXxxx-->AbsBaseCodeNamePeriodXXXX

Config扩展自AbsBase并实现base。ConfigService扩展自AbsBaseService<>并实现BaseService<>（使用ConfigRepository）ConfigController扩展自AbsBaseController<>并实现BaseController<>（使用ConfigService）

我有一个通用的方法实现的抽象类：实体的接口：Base,BaseCodeName,baseCodeNamePeriod....

>

抽象泛型实体类：AbsBase,AbsBaseCodeName,AbsBaseCodeNamePeriod....

通用接口：BaseRepository,BaseCodeNameRepository,BaseCodeNamePeriodRepository,...

抽象泛型服务（他们需要相应的泛型存储库）：AbsBaseService,AbsBaseCodeNameService,AbsBaseCodeNamePeriodService,...

抽象通用控制器（需要相应的通用服务）：AbsBaseController等。

Answer 1

解决方案：

创建服务接口：IConfigService扩展BaseService

更改服务类：ConfigService扩展AbsBaseService实现IConfigService

在ControllerConfig中，将ConfigService替换为

如果我使用接口工作，但如果我使用类不工作。我不明白为什么，但它起作用了。

Answer 2

首先，您的大多数代码都可以简化，至少可以测试它是否运行良好：

@Transactional
public interface BaseService<T extends Base> {

    void add(T obj); // No need to repeat @Transactional here, unless you want to override default behaviour (says, read_only, for instance)
    void edit(T obj);
    //Etc..
}

// Not much use of an Abstract class here, all methods are exposed in the interface already

@Service
public class ConfigService implements BaseService<Config> {

    // Autowire the field directly. Constructor not needed anymore in this case
    @Autowired
    private ConfigRepository repository;
    // Etc.
}

主计长将遵循与服务相同的准则。

现在应该可以了。如果不是，您需要使用完整的堆栈跟踪（或者至少是最后一个导致的块，它才是真正有意义的那个）来更新您的问题。