我有两个jsf控制器说ControllerA和ControllerB。两者都在Session范围内。我想从ControllerA调用ControllerB中的create方法。我使用@ManagedProperty来做。但它似乎不起作用
@ManagedBean(name = "manageAccountController")
@SessionScoped
public class ControllerA implements Serializable{
public void accountSetup()
{
@ManagedProperty(value="#{controllerB}")
private ControllerB details;
System.out.print("Inside controller ");
details.create();
}
}
public String prepareCreate() {
System.out.print("Inside prepare create ");
current = new ControllerB();
selectedItemIndex = -1;
return "Create";
}
public String create() {
try {
System.out.print("Inside create ");
getJpaController().create(current);
JsfUtil.addSuccessMessage(ResourceBundle.getBundle("/Bundle").getString("Created"));
return prepareCreate();
} catch (Exception e) {
JsfUtil.addErrorMessage(e, ResourceBundle.getBundle("/Bundle").getString("PersistenceErrorOccured"));
return null;
}
}
我无法调用controllerB中的方法。控制台显示以下错误
SEVERE: JSF will be unable to create managed bean controllerA when it is requested. The following problems where found:
- Property detailsXX for managed bean controllerA does not exist. Check that appropriate getter and/or setter methods exist.
- Property detailsXXX for managed bean controllerA does not exist. Check that appropriate getter and/or setter methods exist.
WARNING: Unable to create managed bean controllerA. The following problems were found:
- Property detailsXX for managed bean controllerA does not exist. Check that appropriate getter and/or setter methods exist.
- Property detailsXXX for managed bean controllerA does not exist. Check that appropriate getter and/or setter methods exist.
com.sun.faces.mgbean.ManagedBeanCreationException: Unable to create managed bean controllerA. The following problems were found:
- Property detailsXX for managed bean controllerA does not exist. Check that appropriate getter and/or setter methods exist.
- Property detailsXXX for managed bean controllerA does not exist. Check that appropriate getter and/or setter methods exist.
at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:265)
at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:244)
at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116)
at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
at com.sun.el.parser.AstIdentifier.getValue(AstIdentifier.java:99)
at com.sun.el.parser.AstValue.getTarget(AstValue.java:127)
at com.sun.el.parser.AstValue.invoke(AstValue.java:217)
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:593)
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:619)
请指出我的错误...... 感谢
答案 0 :(得分：10)
答案已在异常消息中：
托管bean controllerA的属性detailsXX不存在。 检查是否存在适当的getter和/或setter方法。
您需要为该属性提供一个getter和setter。
@ManagedBean("manageAccountController")
@SessionScoped
public class ControllerA implements Serializable{
@ManagedProperty("#{controllerB}")
private ControllerB details;
public ControllerB getDetails() {
return details;
}
public void setDetails(ControllerB details) {
this.details = details;
}
}
另请注意，我将托管属性声明从accountSetup()方法移回了类。但是，这不会导致您获得的异常，但是在一个简单的编译错误中。在将来，请小心准备问题中的代码以避免红色鲱鱼。
答案 1 :(得分：1)
尝试放置
@ManagedProperty(value="#{controllerB}")
private ControllerB details;
在ControllerA类中，而不是在方法accountSetup中，并为它添加getter / setter ......