changeamountservlet.java

java sql jsp javabean

package com.gc.biz;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Enumeration;
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;
import com.sun.jmx.snmp.Enumerated;

public class ChangeAmountServlet 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)
		{
			List list = (List)ses.getAttribute("shopper");
			Iterator it = list.iterator();
			while(it.hasNext())//存放商品实体类集合的循环
			{
				List lit =(List)it.next();
				Iterator<Products> ite = lit.iterator();
				while(ite.hasNext())//实体类的循环,获取编号
				{
					Products pro = ite.next();
					Enumeration em = request.getParameterNames();
					while(em.hasMoreElements())//表单元素的循环,获取表单提交的值
					{
						String str = em.nextElement().toString();
						int pid = Integer.parseInt(str.substring(6,str.length()));	
						if(pro.getPid()==pid)
						{
							int amount = Integer.parseInt(request.getParameter(str));
							pro.setAmount(amount);
						}
					}
				}
			}
			request.setCharacterEncoding("GBK");
			response.setCharacterEncoding("GBK");
			request.getRequestDispatcher("/MyShopperCart.jsp").forward(request, response);
		}		
	}
}