相关疑难解决方法(0)

我在liferay中创建了一个portlet(这是我的第一个portlet).在那我已经遵循了liferay的mvc结构.它的Java文件如下: -

package com.liferay.samples;

import java.io.IOException;
import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.PortletException;
import javax.portlet.PortletPreferences;
//import javax.portlet.GenericPortlet;
import com.liferay.util.bridges.mvc.MVCPortlet;

public class MyGreetingPortlet extends MVCPortlet {

    @Override
    public void processAction(
            ActionRequest actionRequest, ActionResponse actionResponse)
        throws IOException, PortletException {

       PortletPreferences prefs = actionRequest.getPreferences();

        String greetingname = actionRequest.getParameter("greetingname");
        String greeting     = actionRequest.getParameter("greeting");

        if (greeting != null && greetingname != null) 
        {    

            prefs.setValue(greetingname, greeting);
            prefs.store();
         }
        //System.out.println("In doView code");
        super.processAction(actionRequest, actionResponse);
    }
     public void fetchdataAction( ActionRequest actionRequest, ActionResponse actionResponse)
        throws IOException, PortletException {  
        System.out.println("In doView …