自動接線錯誤彈簧

Question

我是春天的新手。 以前我曾經使用 spring-context xml 配置自動連接。 現在我的項目我們直接使用注解來注入 bean。

當我嘗試自動連接 Mongo 存儲庫時，出現以下異常。

下面是示例代碼。

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;
}

暫存文檔庫：

 public interface StagingDocumentRepository extends
  MongoRepository<CIPPayload, Serializable> {

 }

問題是我知道如何使用@bean注釋進行配置。

我試過如下配置。

畢竟下面的答案我已經改變了配置如下。

但改變這一點也不起作用。

@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;
            }
        };
}

輸出：

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

應該是這樣的：

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

}

進而 ：

@Configuration
@EnableMongoRepositories
public class ThisIsAnAppConfigClass{

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

}

Answer 2

嘗試在您的 spring config.xml 文件中定義它

<?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>

沒有 xml 的等價物是這樣的：

@Configuration
public class ThisIsAnAppConfigClass{

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

Answer 3

錯誤信息

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.

告訴你 spring 沒有找到可以注入你的StagingDocumentServiceImpl StagingDocumentRepository bean。

您應該確保定義了一個StagingDocumentRepository bean。 為此，您可以使用多種方法。

• 使用像 Arno_Geismar 在他的回答中顯示的 xml 配置
• 使用組分掃描功能和注釋StagingDocumentRepository用掃描注釋（例如@Repository ）。
• 使用 Java 配置來定義 bean（如下所示）

Java配置：

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

Answer 4

你的問題是它返回一個空值。

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

Answer 5

嘗試使用 @repository 或 @EnableMongoRepositories

Answer 6

您需要了解，在使用 Spring Data 時，指定的存儲庫的實現是由 Spring Data 提供的。 你不應該提供任何這樣的實現。

在您的情況下，如果您已正確配置 Spring Data，則 Spring Data 將提供StagingDocumentRepository的實現。

Spring 報告不存在類型為StagingDocumentRepository bean 的StagingDocumentRepository意味着您沒有正確設置 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
}

您的倉庫並不需要包含到由Spring數據拾起任何額外的注釋。 它只會是：

public interface StagingDocumentRepository extends
  MongoRepository<CIPPayload, Serializable> {

}