RichFaces rich:panelMenu from RF demo causes error

问题

I've got the RichFaces demo panelMenu source verbatim in an index.jsp page. As the demo doesn't supply any backing bean code to support this source, I created these methods in panelMenu.java:

public void updateCurrent(String n) {
    logger.info("updateCurrent called with " + n);
    setCurrent(n);
}

public String getCurrent() {
    return current;
}

public void setCurrent(String c) {
    current = c;
}

When I run this, navigating the menu is fine, but selecting an item to output the selected element text in a box to the right of the menu causes an error:

WARNING: Error calling action method of component with id form:j_id_jsp_920730595_6
javax.faces.FacesException: Error calling action method of component with id form:j_id_jsp_920730595_6
    at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:72)

...

Caused by: javax.faces.el.MethodNotFoundException: org.apache.jasper.el.JspMethodNotFoundException: /index.jsp(27,12) '#{panelMenu.updateCurrent}' Method not found: MyClient.panelMenu@2966a5.updateCurrent()
    at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:92)
    at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:57)
    ... 28 more

Can anyone tell me why? (Tomcat 6, RichFaces 3.3.2 SR1)

回答1:

Your method must not have any arguments. It should look like this (copied from the demo app sources):

public String updateCurrent() {
    FacesContext context = FacesContext.getCurrentInstance();
    setCurrent((String) context.getExternalContext()
         .getRequestParameterMap().get("current"));
    return null;
}

<f:param> doesn't add method arguments. It adds request parameters.

The sources can be checked-out from http://anonsvn.jboss.org/repos/richfaces/tags/3.3.1.GA/samples/richfaces-demo

来源：https://stackoverflow.com/questions/2335058/richfaces-richpanelmenu-from-rf-demo-causes-error

标签

java

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richfaces