在使用JPA進行數據庫的刪除操作時需要使用@Transactional注解來支持事物：

@Modifying @Transactional @Query(' delete from FollowerInfo ' + ' where crmAuth = :crmAuth and investUserId = :invUserId') void deleteByCrmAuthAndInvUserId(@Param('crmAuth') String crmAuth, @Param('invUserId') Long invUserId);

但是，在添加了如上方法后，測試服務啟動失敗。

Caused by: java.lang.IllegalArgumentException: Cannot subclass final class class com.sun.proxy.$Proxy52at org.springframework.cglib.proxy.Enhancer.generateClass(Enhancer.java:446)at org.springframework.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33)at org.springframework.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:317)at org.springframework.aop.framework.ObjenesisCglibAopProxy.createProxyClassAndInstance(ObjenesisCglibAopProxy.java:57)at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:202)... 38 more[2017-02-09 10:56:33 ERROR] [localhost-startStop-1] (org.springframework.web.context.ContextLoader:331) - Context initialization failedorg.springframework.beans.factory.BeanCreationException: Error creating bean with name ’adviserCommFollowerServiceImpl’: Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ounersc.ic.adviser.repository.community.AdviserCommFollowerRepository com.ounersc.ic.adviser.service.impl.AdviserCommFollowerServiceImpl.adviserCommFollowerRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ’adviserCommFollowerRepository’: Post-processing of FactoryBean’s singleton object failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.sun.proxy.$Proxy52]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class class com.sun.proxy.$Proxy52at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1204)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:229)at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:725)at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4738)at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5181)at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)at java.util.concurrent.FutureTask.run(FutureTask.java:262)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)at java.util.concurrent.ThreadPoolExecutor$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 com.ounersc.ic.adviser.repository.community.AdviserCommFollowerRepository com.ounersc.ic.adviser.service.impl.AdviserCommFollowerServiceImpl.adviserCommFollowerRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ’adviserCommFollowerRepository’: Post-processing of FactoryBean’s singleton object failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.sun.proxy.$Proxy52]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class class com.sun.proxy.$Proxy52at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:555)at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)... 22 moreCaused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name ’adviserCommFollowerRepository’: Post-processing of FactoryBean’s singleton object failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.sun.proxy.$Proxy52]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class class com.sun.proxy.$Proxy52at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:116)at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1512)at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:313)at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1081)at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1006)at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:904)at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:527)... 24 moreCaused by: org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.sun.proxy.$Proxy52]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class class com.sun.proxy.$Proxy52at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:212)at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:109)at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.createProxy(AbstractAutoProxyCreator.java:445)at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:331)at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:291)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:422)at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.postProcessObjectFromFactoryBean(AbstractAutowireCapableBeanFactory.java:1713)at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:113)... 31 moreCaused by: java.lang.IllegalArgumentException: Cannot subclass final class class com.sun.proxy.$Proxy52at org.springframework.cglib.proxy.Enhancer.generateClass(Enhancer.java:446)at org.springframework.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33)at org.springframework.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:317)at org.springframework.aop.framework.ObjenesisCglibAopProxy.createProxyClassAndInstance(ObjenesisCglibAopProxy.java:57)at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:202)... 38 more09-Feb-2017 10:56:33.145 SEVERE [localhost-startStop-1] org.apache.catalina.core.StandardContext.startInternal One or more listeners failed to start. Full details will be found in the appropriate container log file09-Feb-2017 10:56:33.145 SEVERE [localhost-startStop-1] org.apache.catalina.core.StandardContext.startInternal Context [] startup failed due to previous errors

org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.sun.proxy.$Proxy52]: Common causes of this problem include using a final class or a non-visible class

對于此異常，這篇帖子中講到了產生該異常的原因，但是未給出解決辦法。

http://stackoverflow.com/questions/20063320/springmvc-proxy-issue

簡單來說，原因主要是代理沖突：Spring 早期的版本，要用com.sun.proxy的代理 ，而 jpa如果加了@transaction 注解后 需要用CGLIB的代理

因此產生了沖突

Spring 已經在高版本中修復了該問題，把Spring從4.0升級到4.2.5后，問題解決：

在pom.xml加入：

<properties><spring.framework.version>4.2.5.RELEASE</spring.framework.version> </properties>Spring 啟用CGLIB解決事物代理失敗問題描述：

接口A提供公用的CRUD 操作，抽象類B實現接口A，接口C提供各模型特有的相關數據庫操作。

類D繼承抽象類B實現接口C如果使用JDK動態代理，Spring會將類D向上轉型為接口C，那么在使用中必須注入接口A。

如果注入類D的類型。會報錯說代理類型XX無法轉換為類D的類型。

<bean class='org.springframework.orm.hibernate4.HibernateTransactionManager'> <property name='sessionFactory' ref='mySessionFactory' /> <property name='dataSource' ref='dataSourceCMS' /> </bean> <!-- the transactional advice (what ’happens’; see the <aop:advisor/> bean below) --> <tx:advice transaction-manager='transactionManagerCMS'> <!-- the transactional semantics... --> <tx:attributes> <tx:method name='*' /> </tx:attributes> </tx:advice> <!-- ensure that the above transactional advice runs for any execution of an operation defined by the FooService interface --> <aop:config proxy-target-class='true'> <aop:pointcut expression='execution(* com.harvest.smartHotels.info.dao.serviceContent.interfaces.*.*(..))' /> <aop:advisor advice-ref='txAdvice' pointcut-ref='fooServiceOperation' /> </aop:config>

動態代理使用CGLIB，這樣注入類型就可以使類D。