deleteshoppercartproductsservlet.java

一个小型的JSP购物网站

package com.gc.biz;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

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.gc.action.Products;

public class DeleteShopperCartProductsServlet extends HttpServlet {

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

		response.setContentType("text/html");
		HttpSession ses = request.getSession();	

		if(ses.getAttribute("shopper")!=null && request.getParameter("pid")!=null)
		{
			int id = Integer.parseInt(request.getParameter("pid"));
			List list = (List)request.getSession().getAttribute("shopper");
			Iterator it = list.iterator();
			while(it.hasNext())
			{
				List<Products> li = (List)it.next();
				Iterator<Products> lit = li.iterator();
				while(lit.hasNext())
				{
					int pid = lit.next().getPid();
					if(pid==id)
					{
						it.remove();
						break;
					}
				}
			}
			response.setCharacterEncoding("GBK");
			request.setCharacterEncoding("GBK");
			if(list.size()<=0)
			{
				ses.removeAttribute("shopper");
			}
			request.getRequestDispatcher("/MyShopperCart.jsp").forward(request, response);
		}
	}
}