src/com/action/buy_servlet.java

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package com.action;

import java.io.IOException;
import java.sql.ResultSet;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
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.dao.DB;
import com.orm.Tshangpin;
import com.orm.Torder;
import com.orm.TorderItem;
import com.orm.Tyonghu;
import com.service.liuService;
import com.util.Cart;

public class buy_servlet extends HttpServlet
{
	public void service(HttpServletRequest req,HttpServletResponse res)throws ServletException, IOException 
	{
        String type=req.getParameter("type");
		
		
		if(type.endsWith("addToCart"))
		{
			addToCart(req, res);
		}
		if(type.endsWith("orderSubmit"))
		{
			orderSubmit(req, res);
		}
		if(type.endsWith("myorder"))
		{
			myorder(req, res);
		}
		if(type.endsWith("orderDetail"))
		{
			orderDetail(req, res);
		}
	}
	public void addToCart(HttpServletRequest req,HttpServletResponse res)
	{
		int goods_id=Integer.parseInt(req.getParameter("goods_id"));
		int quantity=Integer.parseInt(req.getParameter("quantity"));
		Tshangpin shangpin=liuService.getshangpin(goods_id);
		
		TorderItem orderItem=new TorderItem();
		orderItem.setGoods(shangpin);
		orderItem.setGoods_quantity(quantity);
		HttpSession session=req.getSession();
		Cart cart =(Cart)session.getAttribute("cart");
		cart.addGoods(goods_id, orderItem);