pageservlet.java~5~

在线购物系统,ajax+jsp实现

package com.accp.gz.th.zm.client.servlet;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import com.accp.gz.th.zm.client.javabean.PageBean;

public class PageServlet extends HttpServlet {
    private static final String CONTENT_TYPE = "text/html; charset=GBK";

    // 处理 Get 请求
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        response.setContentType(CONTENT_TYPE);
        HttpSession session=request.getSession();

// 取类别ID
int tid=-1;
if(request.getParameter("tid")!=null && !request.getParameter("tid").equals("")){
  tid = Integer.parseInt(request.getParameter("tid"));
}

// 取页码
int pageno=1;
if(request.getParameter("currentpageno")!=null && !request.getParameter("currentpageno").equals("")){
  pageno = Integer.parseInt(request.getParameter("currentpageno"));
}

// 取每页行数
int linesPerPage = 10;
if(request.getParameter("linesPerPage")!=null && !request.getParameter("linesPerPage").equals("")){
  linesPerPage = Integer.parseInt(request.getParameter("linesPerPage"));
}

// 实例化ＪＡＶＡＢＥＡＮ
PageBean pagebean=null;
if(session.getAttribute("pagebean")!=null){
  pagebean = (PageBean)session.getAttribute("pagebean");
}else{
  pagebean=new PageBean();
  session.setAttribute("pagebean",pagebean);
}

// 从页面取数据封装到PageBean
pagebean.setPageNo(pageno);
pagebean.setLinesPerPage(linesPerPage);
pagebean.setTid(tid);

// 从数据库取数据
ArrayList list=pagebean.getDataList();

    }

    // 处理 Post 请求
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        doGet(request, response);
    }
}