java - Servlet Faces Servlet 的错误 StandardWrapperValve[Faces Servlet] :PWC1406: Servlet. service() 引发异常

Question

在我的 ManagedBean 中，如果我将范围从 @RequestScoped 更改为 @ViewScoped，我将收到以下错误堆栈。我该如何解决这个问题？不过，当我运行应用程序时，我可以在页面中看到结果。

我正在 glassfish 3 上运行 Mojarra 2.1.3 (FCS b02)

问候

    WARNING: StandardWrapperValve[Faces Servlet]: 
PWC1406: Servlet.service() for servlet Faces Servlet threw exception
    java.io.NotSerializableException: bean
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1164)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
        at java.util.ArrayList.writeObject(ArrayList.java:570)
        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 java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
        at java.util.HashMap.writeObject(HashMap.java:1001)
        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 java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1518)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1483)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
        at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1346)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1154)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
        at java.util.HashMap.writeObject(HashMap.java:1001)
        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 java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:945)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1469)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1400)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1158)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:330)
        at com.sun.faces.renderkit.ClientSideStateHelper.doWriteState(ClientSideStateHelper.java:325)
        at com.sun.faces.renderkit.ClientSideStateHelper.writeState(ClientSideStateHelper.java:173)
        at com.sun.faces.renderkit.ResponseStateManagerImpl.writeState(ResponseStateManagerImpl.java:122)
        at com.sun.faces.application.StateManagerImpl.writeState(StateManagerImpl.java:166)
        at com.sun.faces.application.view.WriteBehindStateWriter.flushToWriter(WriteBehindStateWriter.java:225)
        at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:418)
        at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
        at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
        at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
        at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
        at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1539)
        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:330)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
        at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:174)
        at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:828)
        at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:725)
        at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1019)
        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)

更新1

public class SchedulesBean implements Serializable {

    Logger logger = Logger.getLogger(this.getClass().getName().toString());
    CommonMethods commonMethods = new CommonMethods();
    private ScheduleDAO scheduleDAO = DatabaseConnection
            .getInstance(commonMethods.getDSName()).geScheduleDAO();
    List<Schedule> beanValues = new ArrayList<Schedule>();
    private Schedule schedule;

    private Schedule selectedRow  = new Schedule();

    public SchedulesBean() {

        this.getSchedules();                
    }

    public Schedule getSchedule() {
        return schedule;
    }

    public void setSchedule(Schedule schedule) {
        this.schedule = schedule;
    }

    public void getSchedules() {

        try {
            beanValues = scheduleDAO.loadSchedules();

        } catch (Exception e) {
            // TODO: handle exception
        }

    }

    public void selectedRow(SelectEvent event) {
        selectedRow = (Schedule) event.getObject();
        logger.info("selectedRow "+selectedRow);
    }

Answer 1

让您的 bean 实现 java.io.Serialized 接口(interface)。问题就解决了。