学步园

org.springframework.dao.InvalidDataAccessApiUsageException: object references an unsaved transient instance - save the transient instance before flushing: com.sh.pojo.Orders; nested exception is org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.sh.pojo.Orders<br /> org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:651)<br /> org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)<br /> org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:424)<br /> org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)<br /> org.springframework.orm.hibernate3.HibernateTemplate.save(HibernateTemplate.java:694)<br /> com.sh.service.UserService.save(UserService.java:25)<br /> com.sh.action.UserAction.save(UserAction.java:55)<br /> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br /> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)<br /> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)<br /> java.lang.reflect.Method.invoke(Method.java:597)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:440)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:279)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)<br /> com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:163)<br /> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:249)<br /> org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)<br /> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)<br /> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)<br /> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:148)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:93)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:128)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:104)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)<br /> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:148)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:128)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)<br /> org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:468)<br /> org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)<br /> org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:76)<br /> org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)<br /> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)</p> <p>root cause</p> <p>org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.sh.pojo.Orders<br /> org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:242)<br /> org.hibernate.type.EntityType.getIdentifier(EntityType.java:430)<br /> org.hibernate.type.ManyToOneType.nullSafeSet(ManyToOneType.java:101)<br /> org.hibernate.persister.collection.AbstractCollectionPersister.writeElement(AbstractCollectionPersister.java:777)<br /> org.hibernate.persister.collection.AbstractCollectionPersister.recreate(AbstractCollectionPersister.java:1165)<br /> org.hibernate.action.CollectionRecreateAction.execute(CollectionRecreateAction.java:58)<br /> org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)<br /> org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:263)<br /> org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:171)<br /> org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)<br /> org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50)<br /> org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1028)<br /> org.springframework.orm.hibernate3.HibernateAccessor.flushIfNecessary(HibernateAccessor.java:390)<br /> org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:420)<br /> org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)<br /> org.springframework.orm.hibernate3.HibernateTemplate.save(HibernateTemplate.java:694)<br /> com.sh.service.UserService.save(UserService.java:25)<br /> com.sh.action.UserAction.save(UserAction.java:55)<br /> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)<br /> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)<br /> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)<br /> java.lang.reflect.Method.invoke(Method.java:597)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:440)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:279)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:242)<br /> com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:163)<br /> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:249)<br /> org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)<br /> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)<br /> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)<br /> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:148)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:93)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:128)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> org.apache.struts2.interceptor.ProfilingActivationInterceptor.intercept(ProfilingActivationInterceptor.java:104)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138)<br /> com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:148)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:128)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176)<br /> com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:236)<br /> org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)<br /> org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:468)<br /> org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)<br /> org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:76)<br /> org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)<br /> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)<br />

　　让我们来分析一下异常信息：object references an unsaved transient instance - save the transient instance before flushing:com.sh.pojo.Orders，说白了就是对象在保存之前是个transient实例，在flushing实体类Orders之前，它是个transient实例。也就是说hibernate是不允许persistent对象与transient 对象相关联映射，也就是说在保存某一个持久化对象的时候，与之关联的对象还不存在，在数据库里面还没有任何记录，也就是空映射，hibernate是不允许这样做的，所以只要我们先把相关联的对象纳入到Session管理，建立persistent对象实例即可。希望对大家有所帮助！

解决办法: 在@oneToMany后面加(cascade = CascadeType.ALL), 即:@oneToMany(cascade="CascadeType.ALL")