loadnewsbycategory.java

新闻发布系统news struts+spring+hibernate

package org.yeeku.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
import org.apache.struts.validator.DynaValidatorForm;

import org.yeeku.action.base.BaseAction;
import java.util.Set;

/**
 * @author  yeeku.H.lee [e-mail]
 * @version  1.0
 * <br>Copyright (C), 2005-2008, yeeku.H.Lee
 * <br>This program is protected by copyright laws.
 * <br>Program Name:
 * <br>Date: 
 */
public class LoadNewsByCategory extends BaseAction
{
    //必须重写该核心方法，该方法actionForm将表单的请求参数封装成值对象
    public ActionForward execute(ActionMapping mapping, ActionForm form,
       HttpServletRequest request, HttpServletResponse response)throws Exception
    {
        Set result = null;
        String cateId = null;
        try
        {
            if (request.getAttribute("categoryId") == null)
            {
                cateId = request.getParameter("categoryId");
            }
            else
            {
                cateId = (String)request.getAttribute("categoryId");
            }
            result = mgr.getCategory(cateId).getNews();
        }
        catch (Exception e)
        {
            e.printStackTrace();
            return mapping.findForward("failure");
        }
        request.setAttribute("categoryId" , cateId);
        request.setAttribute("news",result);        
        return mapping.findForward("success");
    }
}