持久化实体时出现 javax.ejb.EJBException

Question

我有一个名为 Medico 的实体，它是从数据库创建为实体类的，因此我认为实体定义在这里是安全的，尽管如此，定义如下：

@Entity
@Table(name = "medico")
@XmlRootElement
@NamedQueries({All named queries here})
public class Medico implements Serializable {
private static final long serialVersionUID = 1L;
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @NotNull
    @Column(name = "idMedico")
    private Integer idMedico;
    @Basic(optional = false)
    @NotNull
    @Column(name = "Identificacion")
    private int identificacion;
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 33)
    @Column(name = "Primer_Nombre")
    private String primerNombre;
    @Size(max = 33)
    @Column(name = "Segundo_Nombre")
    private String segundoNombre;
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 33)
    @Column(name = "Primer_Apellido")
    private String primerApellido;
    @Size(max = 33)
    @Column(name = "Segundo_Apellido")
    private String segundoApellido;
    @Basic(optional = false)
    @NotNull
    @Column(name = "Telefono")
    private long telefono;
    @Column(name = "Telefono_Celular")
    private BigInteger telefonoCelular;
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 33)
    @Column(name = "Direccion")
    private String direccion;
    // Constructors..
    // Getters and setters..
}

我想创建新的 Medico< /em> MySql 数据库上的实体，这就是我这样做的方式：

@ManagedBean
@ViewScoped
public class ConsultaMedicos implements Serializable {
// Variables Definition ..
@EJB
private DoctorsFacadeLocal doctorsFacade; 
// Constructor and other methods ..
public String save()
    {
        try{
            doctorsFacade.save(consultedDoctor);
            FacesMessage fm = new FacesMessage(FacesMessage.SEVERITY_INFO, CREATE_SUMMARY, null);
            FacesContext.getCurrentInstance().addMessage(CREATE_SUMMARY, fm);
        }
        catch(Exception ex){
            FacesMessage fm = new FacesMessage(FacesMessage.SEVERITY_ERROR, CREATE_ERROR_SUMMARY, null);
            FacesContext.getCurrentInstance().addMessage(CREATE_ERROR_SUMMARY, fm);
            return null;
        }
        return "listaMedicos.xhtml";
    }
...
}  

---

@Local
public interface DoctorsFacadeLocal {

    List<Medico> findAllDoctors();
    Medico findDoctorByIdNumber(int identificacion);
    void edit(Medico medico);
    void save(Medico medico);
}  

---

@Stateless
public class DoctorsFacade implements DoctorsFacadeLocal {

    @PersistenceContext
    private EntityManager em;
// Other methods.. 
    @Override
    @TransactionAttribute(TransactionAttributeType.REQUIRED)
    public void save(Medico medico)
    {
        em.persist(medico);
        em.flush();
    }
}

---

从 JSF 页面调用 save() 后，出现以下异常：

javax.ejb.EJBException
    at com.sun.ejb.containers.BaseContainer.processSystemException(BaseContainer.java:5194)
    at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:5092)
    at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:4880)
    at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:2039)
    at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1990)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:222)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88)
    at $Proxy157.save(Unknown Source)
    at com.lemm.web.bean.ConsultaMedicos.save(ConsultaMedicos.java:89)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at javax.el.BeanELResolver.invokeMethod(BeanELResolver.java:737)
    at javax.el.BeanELResolver.invoke(BeanELResolver.java:467)
    at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:254)
    at com.sun.el.parser.AstValue.invoke(AstValue.java:228)
    at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:297)
    at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
    at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
    at javax.faces.component.UICommand.broadcast(UICommand.java:315)
    at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)
    at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)
    at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
    at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
    at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:409)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1534)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:98)
    at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:91)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:162)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:326)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:227)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:170)
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:822)
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:719)
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1013)
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:225)
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
    at java.lang.Thread.run(Thread.java:662)
Caused by: javax.validation.ConstraintViolationException: Bean Validation constraint(s) violated while executing Automatic Bean Validation on callback event:'prePersist'. Please refer to embedded ConstraintViolations for details.
    at org.eclipse.persistence.internal.jpa.metadata.listeners.BeanValidationListener.validateOnCallbackEvent(BeanValidationListener.java:90)
    at org.eclipse.persistence.internal.jpa.metadata.listeners.BeanValidationListener.prePersist(BeanValidationListener.java:62)
    at org.eclipse.persistence.descriptors.DescriptorEventManager.notifyListener(DescriptorEventManager.java:698)
    at org.eclipse.persistence.descriptors.DescriptorEventManager.notifyEJB30Listeners(DescriptorEventManager.java:641)
    at org.eclipse.persistence.descriptors.DescriptorEventManager.executeEvent(DescriptorEventManager.java:200)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerNewObjectClone(UnitOfWorkImpl.java:4216)
    at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.cloneAndRegisterNewObject(RepeatableWriteUnitOfWork.java:576)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.internalRegisterObject(UnitOfWorkImpl.java:2883)
    at org.eclipse.persistence.internal.sessions.MergeManager.registerObjectForMergeCloneIntoWorkingCopy(MergeManager.java:932)
    at org.eclipse.persistence.internal.sessions.MergeManager.mergeChangesOfCloneIntoWorkingCopy(MergeManager.java:492)
    at org.eclipse.persistence.internal.sessions.MergeManager.mergeChanges(MergeManager.java:263)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.mergeCloneWithReferences(UnitOfWorkImpl.java:3467)
    at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.mergeCloneWithReferences(RepeatableWriteUnitOfWork.java:363)
    at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.mergeCloneWithReferences(UnitOfWorkImpl.java:3427)
    at org.eclipse.persistence.internal.jpa.EntityManagerImpl.mergeInternal(EntityManagerImpl.java:452)
    at org.eclipse.persistence.internal.jpa.EntityManagerImpl.merge(EntityManagerImpl.java:429)
    at com.sun.enterprise.container.common.impl.EntityManagerWrapper.merge(EntityManagerWrapper.java:286)
    at com.lemm.ejb.facade.DoctorsFacade.save(DoctorsFacade.java:61)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1052)
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1124)
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:5367)
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:619)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:801)
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:571)
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doAround(SystemInterceptorProxy.java:162)
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:144)
    at sun.reflect.GeneratedMethodAccessor78.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:862)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:801)
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:371)
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:5339)
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:5327)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:214)
    ... 47 more

---

我做错了什么？我错过了什么？
如果它有任何作用，那就是我的 persistence.xml

<persistence-unit name="lemmPU" transaction-type="JTA">
    <jta-data-source>jdbc/lemmdb</jta-data-source>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties>
    </properties>
</persistence-unit>

Answer 1

该异常清楚地表明存在约束验证违规。我假设您在类中有一个预持久拦截器，它定义了您尝试保存的 ConsultedDoctor 的类型。
查看那里并提供有关类类型和预持久拦截器以及 Medico 实体 bean 的映射和约束的更多信息。

亲切的问候

Answer 2

如果您有一个具有自动递增 Id 的实体，并且您希望使用 JPA 使用其空构造函数来持久化它，则持久化上下文会在 PrePersist 阶段抛出验证错误。请记住，自动递增的 no 是在 postPersist 阶段生成的，因此它会验证实体是否违反空约束。发生这种情况是因为我们在持久性单元中将验证策略指定为 auto。将此验证策略更改为无，如

    <persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence"      
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com 
    /xml/ns/persistence/persistence_2_0.xsd">
    <persistence-unit name="studPU" transaction-type="JTA">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <jta-data-source>jdbc/mysql</jta-data-source>
   <exclude-unlisted-classes>false</exclude-unlisted-classes>
   <validation-mode>NONE</validation-mode>
   <properties>
   <property name="eclipselink.weaving" value="false"/>
   <property name="eclipselink.weaving.fetchgroups" value="false"/>
   </properties>
   </persistence-unit>
    </persistence>

保存持久性单元并重新部署您的应用程序中给出的那样。现在它不会抛出任何验证错误，因为验证的责任在于您。

Answer 3

这个问题帮助我在长时间的头撞墙之后解决了这个问题。 @peshkira 是正确的，但如果提供以下代码，它可能会节省我一些时间。对实体运行验证以暴露失败的约束。

ValidatorFactory factory = Validation.buildDefaultValidatorFactory();
Validator validator = factory.getValidator();
Set<ConstraintViolation<Medico>> constraintViolations = validator.validate(medico);
if(constraintViolations.size() > 0){
    Iterator<ConstraintViolation<Medico>> iterator = constraintViolations.iterator();
    while(iterator.hasNext()){
        ConstraintViolation<Medico> cv = iterator.next();
        System.out.println(cv.getMessage());
        System.out.println(cv.getPropertyPath());
    }
 }

我的问题原来是数据库中的现有记录在发现后无法通过实体验证。

Answer 4

您好，如果您在 Netbeans 中进行开发，您可能会因为一些混淆而遇到此错误，因为 Netbeans 创建了 persistence.xml 文件的两个副本。其中一个您倾向于将其放入类路径中的 META-INF 中，另一个则保留在 Netbeans 的配置文件目录中。在 Netbeans 启动的应用程序上（通过按绿色启动三角形），将使用 META-INF 中的副本，但如果您“清理并构建”项目，则使用配置文件目录中的副本。如果他们不同，地狱就乱了。

Answer 5

如果上面提供的帮助没有帮助，请检查您的 servlet 是否在 jsp 页面中获取了正确的参数。

确保 String name =response.getParameter("Name"); （在servlet文件中）jsp文件中存在一个参数“Name”。如果不存在，则将tring name设置为null，并且不能将null插入到标记为not null的字段中。

从个人经验来看。