autowire异常的三个情况

 2010-3-11 16:06:00 net.sf.ehcache.config.ConfigurationFactory parseConfiguration
 警告: No configuration found. Configuring ehcache from ehcache-failsafe.xml  found in the classpath: jar:file:/E:/kenny/%e9%a1%b9%e7%9b%ae/shops/webapp/WEB-INF/lib/ehcache-1.6.1.jar!/ehcache-failsafe.xml
 2010-03-11 16:06:02,734 [main] ERROR [org.springframework.test.context.TestContextManager] - Caught exception while allowing TestExecutionListener [org.springframework.test.context.support.DependencyInjectionTestExecutionListener@1292d12] to prepare test instance [com.zzh.entity.product.BrandServiceImplTest@4e32c8]
 org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.zzh.entity.product.BrandServiceImplTest': Autowiring of fields failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.zzh.service.product.impl.BrandServiceImpl com.zzh.entity.product.BrandServiceImplTest.brandServiceImpl; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'brandServiceImpl': Autowiring of fields failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.zzh.dao.product.BrandDao com.zzh.service.product.impl.BrandServiceImpl.brandDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.zzh.dao.product.BrandDao] is defined: Unsatisfied dependency of type [class com.zzh.dao.product.BrandDao]: expected at least 1 matching bean
     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessAfterInstantiation(AutowiredAnnotationBeanPostProcessor.java:243)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:959)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireBeanProperties(AbstractAutowireCapableBeanFactory.java:329)
     at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:110)
     at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:75)
     at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:255)
     at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:111)
     at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.invokeTestMethod(SpringJUnit4ClassRunner.java:148)
     at org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.java:51)
     at org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44)
     at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:27)
     at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37)
     at org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42)
     at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:97)
     at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:46)
     at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
     at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
 Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.zzh.service.product.impl.BrandServiceImpl com.zzh.entity.product.BrandServiceImplTest.brandServiceImpl; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'brandServiceImpl': Autowiring of fields failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.zzh.dao.product.BrandDao com.zzh.service.product.impl.BrandServiceImpl.brandDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.zzh.dao.product.BrandDao] is defined: Unsatisfied dependency of type [class com.zzh.dao.product.BrandDao]: expected at least 1 matching bean
     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:435)
     at org.springframework.beans.factory.annotation.InjectionMetadata.injectFields(InjectionMetadata.java:105)
     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessAfterInstantiation(AutowiredAnnotationBeanPostProcessor.java:240)
     ... 19 more
 Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'brandServiceImpl': Autowiring of fields failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.zzh.dao.product.BrandDao com.zzh.service.product.impl.BrandServiceImpl.brandDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.zzh.dao.product.BrandDao] is defined: Unsatisfied dependency of type [class com.zzh.dao.product.BrandDao]: expected at least 1 matching bean
     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessAfterInstantiation(AutowiredAnnotationBeanPostProcessor.java:243)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:959)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:472)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
     at java.security.AccessController.doPrivileged(Native Method)
     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
     at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
     at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:671)
     at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:610)
     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:412)
     ... 21 more
 Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.zzh.dao.product.BrandDao com.zzh.service.product.impl.BrandServiceImpl.brandDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.zzh.dao.product.BrandDao] is defined: Unsatisfied dependency of type [class com.zzh.dao.product.BrandDao]: expected at least 1 matching bean
     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:435)
     at org.springframework.beans.factory.annotation.InjectionMetadata.injectFields(InjectionMetadata.java:105)
     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessAfterInstantiation(AutowiredAnnotationBeanPostProcessor.java:240)
     ... 34 more
 Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.zzh.dao.product.BrandDao] is defined: Unsatisfied dependency of type [class com.zzh.dao.product.BrandDao]: expected at least 1 matching bean
     at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:613)
     at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:412)
     ... 36 more

 autowire异常主要由三个情况发生的

像上面的情况是BrandDao没有注入，

1。你的BrandServiceImpl必须以@Service或@Component注解才行。

 

2。自动写入的时候把接口写成实现类了 
@Autowired 
private BrandServiceImpl      brandServiceImpl; 
应该是 
@Autowired 
private BrandService    brandService ;

 

3.在BrandDao 类上加上@Repository注解