我有两个班级,每个班级通过工厂自动装配同一班级:
@Service
public class AnalyseDispensationNominativeMetierService implements IAnalyseDispensationNominativeMetierService {
@Autowired
@Qualifier("interfaceAutomateServiceFactory")
private IInterfaceAutomateMetierService interfaceAutomateMetierService;
[...]
@Service
public class AnalysePreparationGlobaleMetierService implements IAnalysePreparationGlobaleMetierService {
@Autowired
@Qualifier("interfaceAutomateServiceFactory")
private IInterfaceAutomateMetierService interfaceAutomateMetierService;
[...]
我想通过工厂创建的对象:
@Service
public class InterfaceAutomate implements IInterfaceAutomateMetierService {
[...]
工厂:
@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;
}
即使使用限定符注释,我仍会收到以下错误...我在做什么错的任何主意吗? :
No unique bean of type [IInterfaceAutomateMetierService] is defined: expected single matching bean but found 2: [interfaceAutomate, interfaceAutomateServiceFactory]
完整的堆栈跟踪
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
最后,我通过更改factoryBean的名称以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了我的问题。 (是否可能是“双重扫描”引起了麻烦?)
<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;
代替
@Autowired
@Qualifier("interfaceAutomateServiceFactory")
private IInterfaceAutomateMetierService interfaceAutomateMetierService;
尝试一下
@Resource(name="interfaceAutomateServiceFactory")
private IInterfaceAutomateMetierService interfaceAutomateMetierService;
将@Primary批注与您的bean(两者中的一个一起使用可以解决此问题。但是,关于Spring的@Resource批注无法基于自动装配进行区分的问题仍然存在。)>
参考“ Autowiring two beans implementing same interface - how to set default bean to autowire?”
如果您不能或不想修改源代码,请在
@ Resource(name =“ {your child class name}”起作用但@Autowired有时不起作用的原因是因为它们的匹配顺序不同