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解决Spring JPA 使用@transaction注解时产生CGLIB代理冲突问题
来源：jb51　　时间：2021/8/4 17:55:41　　对本文有异议

Spring JPA 使用@transaction注解时产生CGLIB代理冲突

在使用JPA进行数据库的删除操作时需要使用@Transactional注解来支持事物：

  1.  @Modifying
  2.     @Transactional
  3.     @Query(" delete from FollowerInfo " +
  4.             " where crmAuth = :crmAuth and investUserId = :invUserId")
  5.     void deleteByCrmAuthAndInvUserId(@Param("crmAuth") String crmAuth, @Param("invUserId") Long invUserId);

但是，在添加了如上方法后，测试服务启动失败。

查看日志报错如下：

  1. Caused by: java.lang.IllegalArgumentException: Cannot subclass final class class com.sun.proxy.$Proxy52
  2. 	at org.springframework.cglib.proxy.Enhancer.generateClass(Enhancer.java:446)
  3. 	at org.springframework.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33)
  4. 	at org.springframework.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
  5. 	at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
  6. 	at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)
  7. 	at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:317)
  8. 	at org.springframework.aop.framework.ObjenesisCglibAopProxy.createProxyClassAndInstance(ObjenesisCglibAopProxy.java:57)
  9. 	at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:202)
  10. 	... 38 more
  11. [2017-02-09 10:56:33 ERROR] [localhost-startStop-1] (org.springframework.web.context.ContextLoader:331) - Context initialization failed
  12. org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'adviserCommFollowerServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ounersc.ic.adviser.repository.community.AdviserCommFollowerRepository com.ounersc.ic.adviser.service.impl.AdviserCommFollowerServiceImpl.adviserCommFollowerRepository; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'adviserCommFollowerRepository': Post-processing of FactoryBean's singleton object failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.sun.proxy.$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.$Proxy52
  13. 	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
  14. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1204)
  15. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538)
  16. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
  17. 	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
  18. 	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:229)
  19. 	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
  20. 	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
  21. 	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:725)
  22. 	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
  23. 	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
  24. 	at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
  25. 	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
  26. 	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
  27. 	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4738)
  28. 	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5181)
  29. 	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
  30. 	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1408)
  31. 	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1398)
  32. 	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
  33. 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
  34. 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
  35. 	at java.lang.Thread.run(Thread.java:745)
  36. 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.$Proxy52]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class class com.sun.proxy.$Proxy52
  37. 	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:555)
  38. 	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
  39. 	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
  40. 	... 22 more
  41. Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'adviserCommFollowerRepository': Post-processing of FactoryBean's singleton object failed; nested exception is org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.sun.proxy.$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.$Proxy52
  42. 	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:116)
  43. 	at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1512)
  44. 	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:313)
  45. 	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
  46. 	at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1081)
  47. 	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1006)
  48. 	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:904)
  49. 	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:527)
  50. 	... 24 more
  51. Caused by: org.springframework.aop.framework.AopConfigException: Could not generate CGLIB subclass of class [class com.sun.proxy.$Proxy52]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class class com.sun.proxy.$Proxy52
  52. 	at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:212)
  53. 	at org.springframework.aop.framework.ProxyFactory.getProxy(ProxyFactory.java:109)
  54. 	at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.createProxy(AbstractAutoProxyCreator.java:445)
  55. 	at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.wrapIfNecessary(AbstractAutoProxyCreator.java:331)
  56. 	at org.springframework.aop.framework.autoproxy.AbstractAutoProxyCreator.postProcessAfterInitialization(AbstractAutoProxyCreator.java:291)
  57. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:422)
  58. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.postProcessObjectFromFactoryBean(AbstractAutowireCapableBeanFactory.java:1713)
  59. 	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:113)
  60. 	... 31 more
  61. Caused by: java.lang.IllegalArgumentException: Cannot subclass final class class com.sun.proxy.$Proxy52
  62. 	at org.springframework.cglib.proxy.Enhancer.generateClass(Enhancer.java:446)
  63. 	at org.springframework.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33)
  64. 	at org.springframework.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
  65. 	at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
  66. 	at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:377)
  67. 	at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:317)
  68. 	at org.springframework.aop.framework.ObjenesisCglibAopProxy.createProxyClassAndInstance(ObjenesisCglibAopProxy.java:57)
  69. 	at org.springframework.aop.framework.CglibAopProxy.getProxy(CglibAopProxy.java:202)
  70. 	... 38 more
  71. 09-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 file
  72. 09-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

对于此异常，这篇帖子中讲到了产生该异常的原因，但是未给出解决办法。

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

简单来说，原因主要是代理冲突：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

因此产生了冲突

解决办法：

Spring 已经在高版本中修复了该问题，把Spring从4.0升级到4.2.5后，问题解决：

在pom.xml加入：

  1.    <properties>
  2.         <spring.framework.version>4.2.5.RELEASE</spring.framework.version>
  3.     </properties>

Spring 启用CGLIB解决事物代理失败

问题描述：

接口A提供公用的CRUD 操作，抽象类B实现接口A，接口C提供各模型特有的相关数据库操作。

类D继承抽象类B实现接口C如果使用JDK动态代理，Spring会将类D向上转型为接口C，那么在使用中必须注入接口A。

如果注入类D的类型。会报错说代理类型XX无法转换为类D的类型。

解决办法如下：

  1. <bean id="transactionManagerCMS"
  2.   class="org.springframework.orm.hibernate4.HibernateTransactionManager">
  3.   <property name="sessionFactory" ref="mySessionFactory" />
  4.   <property name="dataSource" ref="dataSourceCMS" />
  5.  </bean>
  6.  <!-- the transactional advice (what 'happens'; see the <aop:advisor/> bean
  7.   below) -->
  8.  <tx:advice id="txAdvice" transaction-manager="transactionManagerCMS">
  9.   <!-- the transactional semantics... -->
  10.   <tx:attributes>
  11.    <tx:method name="*" />
  12.   </tx:attributes>
  13.  </tx:advice>
  14.  <!-- ensure that the above transactional advice runs for any execution of
  15.   an operation defined by the FooService interface -->
  16.  <aop:config proxy-target-class="true">
  17.   <aop:pointcut id="fooServiceOperation"
  18.    expression="execution(* com.harvest.smartHotels.info.dao.serviceContent.interfaces.*.*(..))" />
  19.   <aop:advisor advice-ref="txAdvice" pointcut-ref="fooServiceOperation" />
  20.  </aop:config>

动态代理使用CGLIB，这样注入类型就可以使类D。

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