productlistaction.java

该程序能够准确的记录互联网用户上网所用的流量

package com.briup.admin.web.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 com.briup.admin.service.IAdminService;
import com.briup.common.dao.pojo.Product;



public class ProductListAction extends Action {
	IAdminService adminService;

	public void setAdminService(IAdminService adminService) {
		this.adminService = adminService;
	}

	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		
			/*start:开始索引
			 *num:每次查询的条数
			 *pagenum:每页的条数
			 *pages：所有信息对应的总页数
			 *productsum:所有的产品数
			 *currentPage：当前页
			 **/
			int start;
			int num;
			int pagenum=2;
			int pages;
			int productsnum;
			Integer currentPage;
			
			//若前页没有值，给其赋值1；否则从request中获取该当前页的值
			if(request.getParameter("currentPage")==null){
				currentPage = 1;
			}else{
				currentPage = (Integer.parseInt(request.getParameter("currentPage")));
			}
			
			try {
				//得到所有产品的记录条数
				productsnum = adminService.findProducts();
				
				//判断并得到存储这些记录所需的总页数
				if(productsnum%pagenum==0){
					pages = productsnum/pagenum;
				}else{
					pages = productsnum/pagenum+1;
				}
				
				//循环，是实现分页显示查询到的结果
				for(int i=1;i<=pages;i++){
					if(currentPage==i){
						start = 0+(i-1)*pagenum;
						num = 2;
						List<Product> prolist = adminService.findProducts(start, num);
						
						
						request.setAttribute("prolist", prolist);
						request.setAttribute("currentPage", currentPage);
					}
				}
				//同上，望 request中存放信息，以便在对应的jsp中显示
				request.setAttribute("buddy_TotalNum", productsnum);
				request.setAttribute("buddy_TotalPage", pages);
				
				//成功后，到jsp页面（listFproduct.jsp）显示信息
				return mapping.findForward("success");
				
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				request.setAttribute("message", "查询品牌失败！");
				return mapping.findForward("failed");
			}
			
			
			
		}
	}