javax.persistence.PersistenceException：org.hibernate.PersistentObjectException：傳遞給持久對象的分離實體

Question

結合使用JPA和Hibernate，運行以下代碼時出現異常。 第一次運行它時，一切正常，數據已插入數據庫中。 第二次，當應更新數據時，它失敗：

@AdminTx
public void processSite(Site site) {
    FluxBoutiqueMapping mapping = mapper.generateMappingFromUrl(site);

    Boutique boutique;
    for (FluxBoutiqueMapping.Boutique fluxBoutique : mapping.getListe().getBoutiques()) {
        log.error("Dans la boucle");
        boutique = daoAdmin.namedQuerySingle(Boutique.LOAD_BOUTIQUE_BY_IDWEBSC, fluxBoutique.getId());
        log.error("boutique : "+boutique);

        if (boutique==null) {
            log.error("Dans le new");
            boutique = new Boutique();
        }

        boutique.setSite(site);
        boutique.setUrlLogo(fluxBoutique.getLogo());
        boutique.setUrlBoutique(fluxBoutique.getUrl());
        boutique.setSelected(false);
        boutique.setIdWebSC(fluxBoutique.getId());
        boutique.setDateModification(new Date());

        boutiqueDao.persist(boutique);

        boutique = null;
    }
}

boutiqueDao.persist（）只需調用EntityManager.persist（）方法。

這是我的精品班：

@Entity
@Table(name = "BOUTIQUE")
@SequenceGenerator(name = "SEQ_BOUTIQUE", sequenceName = "SEQ_BOUTIQUE")
@NamedQueries(value = {
        @NamedQuery(name = Boutique.LOAD_BOUTIQUE_BY_IDWEBSC, query = "from Boutique b where b.idWebSC=?1"),
})
public class Boutique implements IPersistentObject, IPubliable<Manifestation> {

    /**
     * 
     */
    private static final long serialVersionUID = -3038903536445432584L;

    public static final String LOAD_BOUTIQUE_BY_IDWEBSC = "load.boutique.by.idwebsc";

    protected long idBoutique;

    protected Site site;

    protected Long idOrigine;

    protected String urlLogo;

    protected String urlBoutique;

    protected boolean selected;

    protected long idWebSC;

    protected Date datePublication;

    protected Date dateModification;

    @Override
    @Id
    @GeneratedValue(generator="SEQ_BOUTIQUE")
    @Column(name = "ID_BOUTIQUE", unique = true, nullable = false, precision = 8, scale = 0)
    public Long getId() {
        return this.idBoutique;
    }

    public void setId(Long idBoutique) {
        this.idBoutique = idBoutique;
    }

    @Override
    public void setIdOrigine(Long idOrigine) {
        this.idOrigine = idOrigine;
    }

    @Override
    @Column(name = "IDORIGINE", length = 7)
    public Long getIdOrigine() {
        return this.idOrigine;
    }

    @Override
    @Temporal(TemporalType.DATE)
    @Column(name = "DATE_PUBLICATION", length = 7)
    public Date getDatePublication() {
        return datePublication;
    }

    @Override
    public void setDatePublication(Date datePublication) {
        this.datePublication = datePublication;

    }

    @Override
    @Temporal(TemporalType.DATE)
    @Column(name = "DATE_MODIFICATION", length = 7)
    public Date getDateModification() {
        return dateModification;
    }

    public void setDateModification(Date dateModification) {
        this.dateModification = dateModification;
    }

    @Override
    public void update(Manifestation newer) {
        // TODO Auto-generated method stub

    }

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "ID_SITE")
    @ForeignKey(name = "FK_BOUTIQUE_SITE")
    public Site getSite() {
        return site;
    }

    public void setSite(Site site) {
        this.site = site;
    }

    @Column(name = "URL_LOGO", length = 255)
    public String getUrlLogo() {
        return urlLogo;
    }

    public void setUrlLogo(String urlLogo) {
        this.urlLogo = urlLogo;
    }

    @Column(name = "URL_BOUTIQUE", length = 255)
    public String getUrlBoutique() {
        return urlBoutique;
    }

    public void setUrlBoutique(String urlBoutique) {
        this.urlBoutique = urlBoutique;
    }

    @Column(name = "SELECTED")
    public boolean isSelected() {
        return selected;
    }

    public void setSelected(boolean selected) {
        this.selected = selected;
    }

    @Column(name = "ID_WEBSC", length = 7)
    public long getIdWebSC() {
        return idWebSC;
    }

    public void setIdWebSC(long idWebSC) {
        this.idWebSC = idWebSC;
    }

}

最后，我的堆棧跟蹤：

javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: fr.u2m.viparis.business.Boutique
        at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:630)
        at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:219)
        at fr.u2m.dao.jpa.GenericDaoJPAImpl.persist(GenericDaoJPAImpl.java:60)
        at fr.u2m.viparis.service.impl.BoutiqueService.processSite(BoutiqueService.java:81)
        at fr.u2m.viparis.service.impl.BoutiqueService.processAllFluxBoutique(BoutiqueService.java:52)
        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.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:196)
        at $Proxy136.processAllFluxBoutique(Unknown Source)
        at fr.u2m.viparis.fluxboutique.action.FluxBoutiqueAction.loadFlux(FluxBoutiqueAction.java:27)
        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.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
        at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
        at fr.u2m.struts.OpenViewRequestProcessor.processJpaActionPerform(OpenViewRequestProcessor.java:270)
        at fr.u2m.struts.OpenViewRequestProcessor.processActionPerform(OpenViewRequestProcessor.java:115)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
        at fr.u2m.struts.OpenViewRequestProcessor.process(OpenViewRequestProcessor.java:230)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
        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 fr.u2m.viparis.cms.filter.MultiTabSessionFilter.doFilter(MultiTabSessionFilter.java:75)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at fr.u2m.viparis.cms.filter.MonitoringFilter.doFilter(MonitoringFilter.java:54)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at fr.u2m.viparis.cms.util.auditing.AuditingFilter.doFilter(AuditingFilter.java:44)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at fr.u2m.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:71)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
        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:99)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
        at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:200)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
Caused by: org.hibernate.PersistentObjectException: detached entity passed to persist: fr.u2m.viparis.business.Boutique
        at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:79)
        at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:38)
        at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:618)
        at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:592)
        at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:596)
        at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:213)
        ... 65 more

我正在Tomcat 7.0.32服務器上運行Java 7.0.11。

任何想法？

Answer 1

Persist適用於全新的臨時對象，如果已經分配了ID，它將失敗。 您可能應該調用saveOrUpdate而不是persist 。

另外，您可以檢查對象管理器中是否已包含該對象，如果已包含，

entityManager.merge(yourObject);

，其他

entityManager.persist(yourObject);

Answer 2

您的主要問題是要在一個DAO中加載實體：

boutique = daoAdmin.namedQuerySingle(
    Boutique.LOAD_BOUTIQUE_BY_IDWEBSC, fluxBoutique.getId());

但是，然后用另一個保存它們：

boutiqueDao.persist(boutique);

對於現有實體，這將產生一個分離的實體錯誤，因為該實體具有ID，但在第二個DAO的工作單元中不存在。 當然，即使您使用相同的DAO進行讀取/持久存儲，您仍然會遇到問題，因為您不應該使用persist來保存現有實體。 嘗試以下方法：

使用與保存實體相同的DAO讀取實體

精品店= BoutiqueDAO.namedQuerySingle（Boutique.LOAD_BOUTIQUE_BY_IDWEBSC，fluxBoutique.getId（））;

更改您對新精品店的處理，以立即保留該物品

if (boutique==null) {
    log.error("Dans le new");
    boutique = new Boutique();
    boutiqueDAO.persist(boutique);
}

將最后一個持久化更改為合並

boutique.setIdWebSC(fluxBoutique.getId());
boutique.setDateModification(new Date());

boutique = boutiqueDao.merge(boutique);