buyservlet.java~23~

JBuilder 2006 +SQL Server2000 +JavaBean+JSP开发的宠物医院管理系统

package com.pet.shop.action;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import com.pet.shop.model.DTO.GoodsBean;
import com.pet.shop.model.DAO.ShopDao;
import com.pet.shop.model.DAO.impl.Shopimpl;

public class BuyServlet extends HttpServlet {
    private static final String CONTENT_TYPE = "text/html; charset=GB2312";

    //Initialize global variables
    public void init() throws ServletException {
    }

    //Process the HTTP Get request
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        response.setContentType(CONTENT_TYPE);
        request.getCharacterEncoding();
        PrintWriter out = response.getWriter();
        HttpSession session = request.getSession();
        String sgid = request.getParameter("gid");
        int gid = Integer.parseInt(sgid);
        ShopDao shopdao = new Shopimpl();
        ArrayList arrayList = null;
        if (session.getAttribute("buygoods") == null) {
            arrayList = new ArrayList();
            GoodsBean goods = new GoodsBean();
            goods = shopdao.shopGoods(gid);
            goods.setNum(1);
            arrayList.add(goods);
            session.setAttribute("buygoods", arrayList);
        } else {
            ArrayList arrayList1 = (ArrayList) session.getAttribute("buygoods");
            int count = 0;
            for (int i = 0; i < arrayList1.size(); i++) {
                GoodsBean goods = (GoodsBean) arrayList1.get(i);
                if (gid == goods.getGID()) {
                    goods.setNum(goods.getNum() + 1);
                } else {
                    count++;
                }
                arrayList1.set(i, goods);
            }
            if (count == arrayList1.size()) {
                GoodsBean goods = new GoodsBean();
                goods = shopdao.shopGoods(gid);
                goods.setNum(1);
                arrayList1.add(goods);
            }
            session.setAttribute("buygoods", arrayList1);
        }

        request.getRequestDispatcher("shoping.jsp").forward(request, response);
        out.close();
    }

    //Process the HTTP Post request
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws
            ServletException, IOException {
        doGet(request, response);
    }

    //Clean up resources
    public void destroy() {
    }
}