Question

我是春天新手。以前我习惯使用spring-context xml配置自动布线。现在我的项目我们直接使用注释来注入bean。

当我尝试自动连接Mongo存储库时，我遇到异常。

以下是示例代码。

StagingDocumentServiceImpl：

@Service
public class StagingDocumentServiceImpl implements StagingDocumentService {

private static final Logger logger = Logger.getLogger(StagingDocumentServiceImpl.class);
@Autowired
private StagingDocumentRepository stagingDocumentRepository;

/**
 * 
 */
@Override
@Transactional(readOnly = false)
public List<String> saveRawData(Tuple twitter) {

    List<String> tweetIDs = new ArrayList<String>();
    System.out.println("Twitter information get passed.." + twitter);
    Status tweets = (Status) twitter
            .getValueByField(TopologyConstants.TWEETSPOUT_OUT_FIELD);
    //try{
    CIPPayload twitterPayload = DataCaptureTwitterUtil
            .getrawJSONPayloadFromTwitterResponse(tweets);
    String parentID = null;
    System.out.println("twitterPayload"+twitterPayload);
    String tweetParentId = twitterPayload.getContent().getParentContentId();
    /*if (StringUtils.isNotBlank(tweetParentId)) {
        DBObject queryObject = new BasicDBObject();
        queryObject.put("content.id", tweetParentId);
        DBObject resultedData = stagingDocumentRepository.fi
        if (resultedData == null) {
            parentID = getOriginalTweet(tweetParentId);
            tweetIDs.add(parentID);
        }

    }*/

    Test test = stagingDocumentRepository.save(twitterPayload);

    System.out.println("test-->"+test);


    return tweetIDs;
}

StagingDocumentRepository：

 public interface StagingDocumentRepository extends
  MongoRepository<CIPPayload, Serializable> {

 }

问题是我知道如何使用 @bean 注释进行配置。

我试过配置如下。

毕竟下面的回答我已经改变了如下配置。

但改变这种做法也行不通。

@Configuration
public class AppConfig {
    @Bean
    @Bean
    public StagingDocumentRepository stagingDocumentRepository(){
        return new StagingDocumentRepository() {

            @Override
            public <S extends CIPPayload> S save(S entity) {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public CIPPayload findOne(Serializable id) {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public Iterable<CIPPayload> findAll(Iterable<Serializable> ids) {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public boolean exists(Serializable id) {
                // TODO Auto-generated method stub
                return false;
            }

            @Override
            public void deleteAll() {
                // TODO Auto-generated method stub

            }

            @Override
            public void delete(Iterable<? extends CIPPayload> entities) {
                // TODO Auto-generated method stub

            }

            @Override
            public void delete(CIPPayload entity) {
                // TODO Auto-generated method stub

            }

            @Override
            public void delete(Serializable id) {
                // TODO Auto-generated method stub

            }

            @Override
            public long count() {
                // TODO Auto-generated method stub
                return 0;
            }

            @Override
            public Page<CIPPayload> findAll(Pageable pageable) {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public <S extends CIPPayload> List<S> save(Iterable<S> entites) {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public List<CIPPayload> findAll(Sort sort) {
                // TODO Auto-generated method stub
                return null;
            }

            @Override
            public List<CIPPayload> findAll() {
                // TODO Auto-generated method stub
                return null;
            }
        };
}

输出：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'stagingDocumentServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.biomorf.cip.datacapture.repository.payload.StagingDocumentRepository com.biomorf.cip.datacapture.processing.serviceImpl.StagingDocumentServiceImpl.stagingDocumentRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.biomorf.cip.datacapture.repository.payload.StagingDocumentRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:292) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1185) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760) ~[spring-context-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482) ~[spring-context-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691) [spring-boot-1.1.4.RELEASE.jar:1.1.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320) [spring-boot-1.1.4.RELEASE.jar:1.1.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:952) [spring-boot-1.1.4.RELEASE.jar:1.1.4.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:941) [spring-boot-1.1.4.RELEASE.jar:1.1.4.RELEASE]
    at com.biomorf.cip.datacapture.Application.main(Application.java:32) [classes/:na]
       Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.biomorf.cip.datacapture.repository.payload.StagingDocumentRepository com.biomorf.cip.datacapture.processing.serviceImpl.StagingDocumentServiceImpl.stagingDocumentRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.biomorf.cip.datacapture.repository.payload.StagingDocumentRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:508) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:289) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    ... 15 common frames omitted
       Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.biomorf.cip.datacapture.repository.payload.StagingDocumentRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1103) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:963) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:858) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:480) ~[spring-beans-4.0.6.RELEASE.jar:4.0.6.RELEASE]

Answer 1

应该是这样的：

@Respository
public interface StagingDocumentRepository extends
MongoRepository<CIPPayload, Serializable> {

}

然后：

@Configuration
@EnableMongoRepositories
public class ThisIsAnAppConfigClass{

   @Bean 
   public StagingDocumentRepository stagingDocumentRepository(){
      return new StagingDocumentRepository();
   }

}

Answer 2

尝试在spring config.xml文件中定义它

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans    http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.0.xsd">

<bean class="path.to.your.stagingdocumentrepository" id="StagingDocumentRepository" />

</beans>

没有xml的

等价如下：

@Configuration
public class ThisIsAnAppConfigClass{

   @Bean 
   public StagingDocumentRepository stagingDocumentRepository(){
      return new StagingDocumentRepository();
   }
}

Answer 3

错误消息

No qualifying bean of type [com.biomorf.cip.datacapture.repository.payload.StagingDocumentRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency.

告诉你，spring找不到可以注入你StagingDocumentRepository的{{1}} bean。

您应确保定义StagingDocumentServiceImpl bean。为此，您可以使用各种方式。

使用像他的回答中所示的Arno_Geismar的xml配置
使用组件扫描功能并使用扫描的注释注释StagingDocumentRepository（例如StagingDocumentRepository）。
使用Java配置来定义bean（如下所示）

Java配置：

@Repository

Answer 4

你的问题是它返回一个空值。

@Bean
@Qualifier("stagingDocumentRepository")
public StagingDocumentRepository stagingDocumentRepository() {
  return new StagingDocumentRepository(..);
}

Answer 5

尝试使用@repository或@EnableMongoRepositories

Answer 6

您需要了解在使用Spring Data时，Spring Data会提供指定存储库的实现。您应不提供任何此类实施。

在您的情况下，如果您正确配置了Spring Data，Spring Data将提供StagingDocumentRepository的实现。

Spring报告没有StagingDocumentRepository类型的bean存在，这意味着您没有正确设置Spring Data Mongo。

您的Java配置如下所示：

@Configuration
@EnableMongoRepositories("package.under.which.repositories.reside")
public class YourConfig {

    //whatever beans you need
}

您的存储库不需要包含Spring Data要提取的任何额外注释。它只会是：

public interface StagingDocumentRepository extends
  MongoRepository<CIPPayload, Serializable> {

}

自动错误弹簧

6 个答案: