deletenewsaction.java

struts hibernate spring实现新闻发布系统含说明文档

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.ata.wx.java01b.struts.action;

import java.util.List;

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

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.hibernate.Session;
import org.hibernate.Transaction;

import com.ata.wx.java01b.dao.News;
import com.ata.wx.java01b.dao.NewsDAO;
import com.ata.wx.java01b.struts.form.DeleteNewsForm;

/** 
 * MyEclipse Struts
 * Creation date: 03-19-2008
 * 
 * XDoclet definition:
 * @struts.action path="/deleteNews" name="deleteNewsForm" input="/newsmanage.jsp" scope="request" validate="true"
 */
public class DeleteNewsAction extends Action {
	/*
	 * Generated Methods
	 */
	NewsDAO newsdao = new NewsDAO();
	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		DeleteNewsForm deleteNewsForm = (DeleteNewsForm) form;
		String newsid = request.getParameter("newsid");
		Session session = newsdao.getSession();
		
		News news = (News)session.load(News.class, newsid);
		Transaction tr = null;
		try{
			tr = session.beginTransaction();
			System.out.println("delete message");
			newsdao.delete(news);
			tr.commit();
		}catch(Exception e){
			tr.rollback();
			e.printStackTrace();
		}finally{
			session.close();
		}
		
		List<News> newslist = newsdao.findAllNews();
		System.out.println("NewsManageAction()=========");
		request.getSession().setAttribute("news", newslist);
		return mapping.findForward("newsmanage");
	}
}