shopcarproc.java

用mvc实现购物车,简单使用,欢迎大家来下载啊

package com.xaccp.servlet;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.xaccp.business.ProductManager;
import com.xaccp.business.ShopCar;
import com.xaccp.common.StrLib;
import com.xaccp.entity.Product;

public class ShopCarProc extends HttpServlet {

	public ShopCarProc() {
		super();
	}

	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		this.doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		ProductManager prodManager = new ProductManager();
		String prodId = StrLib.toChinese(request.getParameter("prodId"),
				"UTF-8");
		HttpSession session = request.getSession();
		Object obj = session.getAttribute("shopCar");
		ShopCar shopCar = null;
		if (obj == null) {
			shopCar = new ShopCar();// 会话空间中无购物车对象，新创建
		} else {
			shopCar = (ShopCar) obj;
		}
		Product prod = shopCar.getProdFromCar(prodId);
		if (prod == null)// 购物车无此货物，则从数据库中获取
		{
			prod = prodManager.getAProduct(Integer.parseInt(prodId));
			prod.setProdCount(1);
		} else {
			prod.setProdCount(prod.getProdCount() + 1);
		}
		// 商品对象加之购物车
		shopCar.addProduct(prodId, prod);
		// 存储在当前会话
		session.setAttribute("shopCar", shopCar);
		response.sendRedirect("productCar.jsp");
		out.flush();
		out.close();
	}

	public void init() throws ServletException {
		// Put your code here
	}

}