Question

我收到此错误，我不知道如何修复：

java.io.NotSerializableException： com.procc.dao。 EJB31_Generated_ AlertFacade _Intf _ Bean _ at java.io.ObjectOutputStream.writeObject0（ObjectOutputStream.java:1180）在 java.io.ObjectOutputStream.defaultWriteFields（ObjectOutputStream.java:1528）在 java.io.ObjectOutputStream.writeSerialData（ObjectOutputStream.java:1493）在 java.io.ObjectOutputStream.writeOrdinaryObject（ObjectOutputStream.java:1416）在 java.io.ObjectOutputStream.writeObject0（ObjectOutputStream.java:1174）在 java.io.ObjectOutputStream.writeObject（ObjectOutputStream.java:346）在java.util.HashMap.writeObject（HashMap.java:1100）at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:601）at java.io.ObjectStreamClass.invokeWriteObject（ObjectStreamClass.java:975）在 java.io.ObjectOutputStream.writeSerialData（ObjectOutputStream.java:1480）在 java.io.ObjectOutputStream.writeOrdinaryObject（ObjectOutputStream.java:1416）在 java.io.ObjectOutputStream.writeObject0（ObjectOutputStream.java:1174）在 java.io.ObjectOutputStream.defaultWriteFields（ObjectOutputStream.java:1528）在 java.io.ObjectOutputStream.writeSerialData（ObjectOutputStream.java:1493）在 java.io.ObjectOutputStream.writeOrdinaryObject（ObjectOutputStream.java:1416）在 java.io.ObjectOutputStream.writeObject0（ObjectOutputStream.java:1174）在 java.io.ObjectOutputStream.writeArray（ObjectOutputStream.java:1362）在 java.io.ObjectOutputStream.writeObject0（ObjectOutputStream.java:1170）在 java.io.ObjectOutputStream.writeObject（ObjectOutputStream.java:346）在java.util.HashMap.writeObject（HashMap.java:1100）at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:601）at java.io.ObjectStreamClass.invokeWriteObject（ObjectStreamClass.java:975）在 java.io.ObjectOutputStream.writeSerialData（ObjectOutputStream.java:1480）在 java.io.ObjectOutputStream.writeOrdinaryObject（ObjectOutputStream.java:1416）在 java.io.ObjectOutputStream.writeObject0（ObjectOutputStream.java:1174）在 java.io.ObjectOutputStream.writeObject（ObjectOutputStream.java:346）在 com.sun.faces.renderkit.ClientSideStateHelper.doWriteState（ClientSideStateHelper.java:325）在 com.sun.faces.renderkit.ClientSideStateHelper.writeState（ClientSideStateHelper.java:173）在 com.sun.faces.renderkit.ResponseStateManagerImpl.writeState（ResponseStateManagerImpl.java:122）在 com.sun.faces.application.StateManagerImpl.writeState（StateManagerImpl.java:166）在 com.sun.faces.application.view.WriteBehindStateWriter.flushToWriter（WriteBehindStateWriter.java:225）在 com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView（FaceletViewHandlingStrategy.java:419）在 com.sun.faces.application.view.MultiViewHandler.renderView（MultiViewHandler.java:131）在 com.sun.faces.lifecycle.RenderResponsePhase.execute（RenderResponsePhase.java:121）在com.sun.faces.lifecycle.Phase.doPhase（Phase.java:101）at com.sun.faces.lifecycle.LifecycleImpl.render（LifecycleImpl.java:139）在javax.faces.webapp.FacesServlet.service（FacesServlet.java:594）at org.apache.catalina.core.StandardWrapper.service（StandardWrapper.java:1550）在 org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:281）在 org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:175）在 org.apache.catalina.core.StandardPipeline.doInvoke（StandardPipeline.java:655）在 org.apache.catalina.core.StandardPipeline.invoke（StandardPipeline.java:595）在 org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:161）在 org.apache.catalina.connector.CoyoteAdapter.doService（CoyoteAdapter.java:331）在 org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:231）在 com.sun.enterprise.v3.services.impl.ContainerMapper $ AdapterCallable.call（ContainerMapper.java:317）在 com.sun.enterprise.v3.services.impl.ContainerMapper.service（ContainerMapper.java:195）在 com.sun.grizzly.http.ProcessorTask.invokeAdapter（ProcessorTask.java:860）在 com.sun.grizzly.http.ProcessorTask.doProcess（ProcessorTask.java:757）在 com.sun.grizzly.http.ProcessorTask.process（ProcessorTask.java:1056）在 com.sun.grizzly.http.DefaultProtocolFilter.execute（DefaultProtocolFilter.java:229）在 com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter（DefaultProtocolChain.java:137）在 com.sun.grizzly.DefaultProtocolChain.execute（DefaultProtocolChain.java:104）在 com.sun.grizzly.DefaultProtocolChain.execute（DefaultProtocolChain.java:90）在 com.sun.grizzly.http.HttpProtocolChain.execute（HttpProtocolChain.java:79）在 com.sun.grizzly.ProtocolChainContextTask.doCall（ProtocolChainContextTask.java:54）在 com.sun.grizzly.SelectionKeyContextTask.call（SelectionKeyContextTask.java:59）在com.sun.grizzly.ContextTask.run（ContextTask.java:71）at com.sun.grizzly.util.AbstractThreadPool $ Worker.doWork（AbstractThreadPool.java:532）在 com.sun.grizzly.util.AbstractThreadPool $ Worker.run（AbstractThreadPool.java:513）在java.lang.Thread.run（Thread.java:722）

这是AlertFacade：

@Stateless公共类AlertFacade扩展AbstractFacade { @PersistenceContext（unitName =＆＃34; flams_pu＆＃34;）私有EntityManager em;
@Override
protected EntityManager getEntityManager() {
    return em;
}

public AlertFacade() {
    super(Alert.class);
} }

我在JSF Managed bean中使用。

是EJB应该是Serializable吗？我不明白。请帮忙

Answer 1

我会尝试添加到类签名implements Serializable。由于它是一个标记接口，因此您不必实现任何方法。

EJB3.1 NotSerializableException

1 个答案: