我无法理解我的代码中有什么问题，在实践中，在我的系统中我想对特定的课程进行评估，我想节省内存这个评估，但是，当我尝试保存它时，系统带我这个错误：
完成堆栈跟踪。
GRAVE:
Servlet.service() for servlet [Spring MVC Dispatcher Servlet] in context with path [/orion-web] threw exception [Request processing failed; nested exception is org.springframework.webflow.execution.ActionExecutionException: Exception thrown executing [AnnotatedAction@165b124 targetAction = [EvaluateAction@150c296 expression = inserimentoRecruitingController.salvaRecruiting(), resultExpression = [null]], attributes = map[[empty]]] in state 'valutazione' of flow 'valutazioneCandidato-flow' -- action execution attributes were 'map[[empty]]'] with root cause
org.hibernate.PersistentObjectException: [color=#FF0000]detached entity passed to persist: it.dstech.dms.cigno.jpa.model.impl.CurriculumVitaeEntityImpl[/color]
at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:127)
at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:799)
at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:791)
at org.hibernate.engine.EJB3CascadingAction$1.cascade(EJB3CascadingAction.java:48)
at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:392)
at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:335)
at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:204)
at org.hibernate.engine.Cascade.cascade(Cascade.java:161)
at org.hibernate.event.def.AbstractSaveEventListener.cascadeBeforeSave(AbstractSaveEventListener.java:450)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:282)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:203)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:129)
at org.hibernate.ejb.event.EJB3PersistEventListener.saveWithGeneratedId(EJB3PersistEventListener.java:69)
at org.hibernate.event.def.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:179)
at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:135)
at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:61)
at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:808)
at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:782)
at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:786)
at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:672)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:365)
at $Proxy30.persist(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240)
at $Proxy30.persist(Unknown Source)
at it.dstech.dms.cigno.service.core.service.impl.recruiting.RecruitingServiceImpl.saveRecruiting(RecruitingServiceImpl.java:55)
at it.dstech.dms.cigno.service.core.service.impl.recruiting.RecruitingServiceImpl$$FastClassByCGLIB$$1e5f6a9c.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191)
at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:617)
at it.dstech.dms.cigno.service.core.service.impl.recruiting.RecruitingServiceImpl$$EnhancerByCGLIB$$6a801cce.saveRecruiting(<generated>)
at it.dstech.dms.orion.swf.manager.impl.GestioneRecruitingWFManagerImpl.doInsertRecruiting(GestioneRecruitingWFManagerImpl.java:45)
at it.dstech.dms.cigno.model.InserimentoRecruitingController.salvaRecruiting(InserimentoRecruitingController.java:38)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.expression.spel.support.ReflectiveMethodExecutor.execute(ReflectiveMethodExecutor.java:69)
at org.springframework.expression.spel.ast.MethodReference.getValueInternal(MethodReference.java:110)
at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:57)
at org.springframework.expression.spel.ast.SpelNodeImpl.getTypedValue(SpelNodeImpl.java:102)
at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:97)
at org.springframework.binding.expression.spel.SpringELExpression.getValue(SpringELExpression.java:84)
at org.springframework.webflow.action.EvaluateAction.doExecute(EvaluateAction.java:75)
at org.springframework.webflow.action.AbstractAction.execute(AbstractAction.java:188)
at org.springframework.webflow.execution.AnnotatedAction.execute(AnnotatedAction.java:145)
at org.springframework.webflow.execution.ActionExecutor.execute(ActionExecutor.java:51)
at org.springframework.webflow.engine.support.ActionTransitionCriteria.test(ActionTransitionCriteria.java:82)
at org.springframework.webflow.engine.support.TransitionCriteriaChain.test(TransitionCriteriaChain.java:71)
at org.springframework.webflow.engine.Transition.canExecute(Transition.java:195)
at org.springframework.webflow.engine.Transition.execute(Transition.java:211)
at org.springframework.webflow.engine.impl.FlowExecutionImpl.execute(FlowExecutionImpl.java:393)
at org.springframework.webflow.engine.impl.RequestControlContextImpl.execute(RequestControlContextImpl.java:214)
at org.springframework.webflow.engine.TransitionableState.handleEvent(TransitionableState.java:119)
at org.springframework.webflow.engine.Flow.handleEvent(Flow.java:555)
at org.springframework.webflow.engine.impl.FlowExecutionImpl.handleEvent(FlowExecutionImpl.java:388)
at org.springframework.webflow.engine.impl.RequestControlContextImpl.handleEvent(RequestControlContextImpl.java:210)
at org.springframework.webflow.engine.ViewState.handleEvent(ViewState.java:232)
at org.springframework.webflow.engine.ViewState.resume(ViewState.java:196)
at org.springframework.webflow.engine.Flow.resume(Flow.java:545)
at org.springframework.webflow.engine.impl.FlowExecutionImpl.resume(FlowExecutionImpl.java:261)
at org.springframework.webflow.executor.FlowExecutorImpl.resumeExecution(FlowExecutorImpl.java:169)
at org.springframework.webflow.mvc.servlet.FlowHandlerAdapter.handle(FlowHandlerAdapter.java:183)
at org.springframework.faces.webflow.JsfFlowHandlerAdapter.handle(JsfFlowHandlerAdapter.java:48)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java: 539)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
这些是具有hibernate映射的类，红色是发生问题的关系
@Entity
@Table(name = "CGN_CURRVIT")
public class CurriculumVitaeEntityImpl extends AbstractJpaEntity implements
CurriculumVitaeEntity {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "ID")
private Long id;
@ManyToOne(targetEntity = PersonaEntityImpl.class, cascade = CascadeType.ALL)
@JoinColumn(name = "PERSONA")
private PersonaEntity persona;
@OneToOne(mappedBy = "curriculumVitae", targetEntity = RecruitingEntityImpl.class)
@Cascade({ org.hibernate.annotations.CascadeType.SAVE_UPDATE })
private List<RecruitingEntity> recruitingEntity;
`
`
@Entity
@Table(name = "CGN_RECR")
public class RecruitingEntityImpl extends AbstractJpaEntity implements
RecruitingEntity {
/**
*
*/
private static final long serialVersionUID = 1L;
@Id
@Column(name = "ID")
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
@Column(name = "RECRUITING_ID")
private Long recruitingId;
@Column(name = "GIUDIZIO")
private Long giudizio; //valore da 1 a 5
@Column(name = "NOTE")
private String note;
@OneToOne(targetEntity = ValutazioneEntityImpl.class, cascade = CascadeType.ALL, fetch =
FetchType.EAGER)
@JoinColumn(name = "VALUTAZIONE")
private ValutazioneEntity valutazione = new ValutazioneEntityImpl();
@OneToOne(targetEntity = CurriculumVitaeEntityImpl.class, cascade = CascadeType.ALL )
@JoinColumn(name = "CURRICULUM_ID")
@Cascade({ org.hibernate.annotations.CascadeType.SAVE_UPDATE })
private CurriculumVitaeEntity curriculumVitae;
.......
}
这是在数据库中提供数据存储的类
public class RecruitingServiceImpl扩展了AbstractDmsService实现 RecruitingService {
public void saveRecruiting（RecruitingEntity recruiting）{
/* in curriculumVitae ci sono tutti i dati da salvare */
/*
* Cerco il persistenceStatus dal db e lo setto al curriculum vitae e
* alla persona associata
*/
PersistenceStatus persistenceStatus = this.entityManager.find(
PersistenceStatusImpl.class, 1L);
recruiting.setPersistenceStatus(persistenceStatus);
ValutazioneTipologicalEntity valutazioneEntity = valutazioneService
.findByDescription(recruiting.getValutazione().getValutazione()
.getDescription());
recruiting.getValutazione().setValutazione(valutazioneEntity);
recruiting.getValutazione()
.setPersistenceStatus(persistenceStatus);
entityManager.persist(recruiting);
}