org.hibernate.MappingException: Unknown entity:xxx.model.xxxEnhancerBySpringCGLIBfc

单位实习生遇到的问题，作为一名老鸟，不解决了简直没面子，然而在网上找了n种原因，并没有什么卵用，哭着花费了一上午的时间终于找到原因，整合struts的实体类没有初始化，初始化后问题解决，
action中实体类：

public class CategoryAction extends ActionSupport {private Category category;}

初始化：

public class CategoryAction extends ActionSupport {private Category category = new Category();}

下面是页面报错信息

HTTP Status 500 - Unknown entity: cn.it.shop.model.Category$$EnhancerBySpringCGLIB$$fc90085e
type Exception reportmessage Unknown entity: cn.it.shop.model.Category$$EnhancerBySpringCGLIB$$fc90085edescription The server encountered an internal error that prevented it from fulfilling this request.exceptionorg.hibernate.MappingException: Unknown entity: cn.it.shop.model.Category$$EnhancerBySpringCGLIB$$fc90085eorg.hibernate.internal.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:1096)org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1479)org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:236)org.hibernate.event.internal.DefaultUpdateEventListener.performSaveOrUpdate(DefaultUpdateEventListener.java:55)org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)org.hibernate.internal.SessionImpl.fireUpdate(SessionImpl.java:739)org.hibernate.internal.SessionImpl.update(SessionImpl.java:731)org.hibernate.internal.SessionImpl.update(SessionImpl.java:726)cn.it.shop.model.CategoryServiceImpl.update(CategoryServiceImpl.java:42)cn.it.shop.model.CategoryServiceImpl$$FastClassBySpringCGLIB$$6539af9a.invoke(<generated>)org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:720)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:655)cn.it.shop.model.CategoryServiceImpl$$EnhancerBySpringCGLIB$$eaf855a7.update(<generated>)cn.it.shop.model.CategoryAction.update(CategoryAction.java:20)cn.it.shop.model.CategoryAction$$FastClassBySpringCGLIB$$a5faa5f1.invoke(<generated>)org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:720)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:655)cn.it.shop.model.CategoryAction$$EnhancerBySpringCGLIB$$b2dfb01e.update(<generated>)sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)java.lang.reflect.Method.invoke(Method.java:601)ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:870)ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1293)ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68)com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:117)com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:108)ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1369)ognl.ASTMethod.getValueBody(ASTMethod.java:90)ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212)ognl.SimpleNode.getValue(SimpleNode.java:258)ognl.Ognl.getValue(Ognl.java:494)ognl.Ognl.getValue(Ognl.java:458)com.opensymphony.xwork2.ognl.OgnlUtil$2.execute(OgnlUtil.java:309)com.opensymphony.xwork2.ognl.OgnlUtil.compileAndExecute(OgnlUtil.java:340)com.opensymphony.xwork2.ognl.OgnlUtil.getValue(OgnlUtil.java:307)com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:423)com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:287)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:250)org.apache.struts2.interceptor.DeprecationInterceptor.intercept(DeprecationInterceptor.java:41)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:256)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:167)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:265)org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:76)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:138)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:229)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:191)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:73)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.DateTextFieldInterceptor.intercept(DateTextFieldInterceptor.java:125)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:91)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:253)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:145)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:171)com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:139)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:193)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:189)com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:244)org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:54)org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:564)org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:81)org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:99)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.85 logs.Apache Tomcat/7.0.85

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