Spring FactoryBean和autowiring不工作：需要一个匹配bean，但找到2个

Question

我有两个类，每一个通过工厂自动生成同一个类：

@Service
public class AnalyseDispensationNominativeMetierService implements IAnalyseDispensationNominativeMetierService {

  @Autowired
  @Qualifier("interfaceAutomateServiceFactory")
  private IInterfaceAutomateMetierService interfaceAutomateMetierService;
  [...]


@Service
public class AnalysePreparationGlobaleMetierService implements IAnalysePreparationGlobaleMetierService {

  @Autowired
  @Qualifier("interfaceAutomateServiceFactory")
  private IInterfaceAutomateMetierService interfaceAutomateMetierService;
  [...]

@Service
public class InterfaceAutomate implements IInterfaceAutomateMetierService {
[...]

@Service("interfaceAutomateServiceFactory")
public class InterfaceAutomateServiceFactory implements FactoryBean<IInterfaceAutomateMetierService> {

  @Autowired(required = true)
  private InterfaceAutomate ijinInterfaceAutomate;

  @Override
  public IInterfaceAutomateMetierService getObject() {
    return ijinInterfaceAutomate;
  }

  @Override
  public Class<?> getObjectType() {
    return IInterfaceAutomateMetierService.class;
  }

  @Override
  public boolean isSingleton() {
    return false;
  }

No unique bean of type [IInterfaceAutomateMetierService] is defined: expected single matching bean but found 2: [interfaceAutomate, interfaceAutomateServiceFactory]

GRAVE: Exception lors de l'envoi de l'évènement contexte initialisé (context initialized) à l'instance de classe d'écoute (listener) org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'analysePreparationGlobaleMetierService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private dispensation.commun.service.metier.IInterfaceAutomateMetierService dispensation.analysePreparationGlobale.service.metier.impl.AnalysePreparationGlobaleMetierService.interfaceAutomateMetierService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [dispensation.commun.service.metier.IInterfaceAutomateMetierService] is defined: expected single matching bean but found 2: [interfaceAutomate, interfaceAutomateServiceFactory]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:287)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:607)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:925)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:472)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:388)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:293)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4723)
    at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5226)
    at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5221)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private dispensation.commun.service.metier.IInterfaceAutomateMetierService dispensation.analysePreparationGlobale.service.metier.impl.AnalysePreparationGlobaleMetierService.interfaceAutomateMetierService; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [dispensation.commun.service.metier.IInterfaceAutomateMetierService] is defined: expected single matching bean but found 2: [interfaceAutomate, interfaceAutomateServiceFactory]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:513)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:92)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:284)
    ... 20 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [dispensation.commun.service.metier.IInterfaceAutomateMetierService] is defined: expected single matching bean but found 2: [interfaceAutomate, interfaceAutomateServiceFactory]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:823)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:730)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:485)
    ... 22 more

Answer 1

最终，我通过更改factoryBean的名称来匹配注入字段的名称，并通过在项目扫描中删除一个条目来解决我的问题。（会不会是“双扫”惹的祸？）

<context:component-scan base-package="dispensation.**.factory.**,dispensation.**.metier.factory.**

=>

<context:component-scan base-package="dispensation.**.factory.**

@Service("interfaceAutomateMetierService")
public class InterfaceAutomateServiceFactory implements FactoryBean<IInterfaceAutomateMetierService> {

@Service
public class AnalysePreparationGlobaleMetierService implements IAnalysePreparationGlobaleMetierService {

  @Autowired
  private IInterfaceAutomateMetierService interfaceAutomateMetierService;