pageservlet.java~11~

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);

        response.setCharacterEncoding("GBK");

    // 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);
    }
}