checkoutservlet.java

一个ssh的网上购物系统

package com.xfaccp.bookonline.hib.util;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Iterator;

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.xfaccp.bookonline.hib.dao.BookTableDAO;
import com.xfaccp.bookonline.hib.dto.BookTable;

public class CheckOutServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public CheckOutServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
         request.setCharacterEncoding("gb2312");
         HttpSession session=request.getSession();
		if(session.getAttribute("cart")==null)
   		{
   		
   
   		}
   		else
   		{	
   			float sum=0;
   			HashMap map=(HashMap)session.getAttribute("bookinfo");
   			// 获取键值（创建个叠带器对象）
   			Iterator it=map.keySet().iterator();
   			while(it.hasNext())
   			{
   				// 得到键值
   				int id=Integer.parseInt(it.next().toString());
   				// 获得商品数量
   				int count=Integer.parseInt(map.get(new Integer(id)).toString());
   				// 创建个BookBean对象
   				BookTable book=new BookTable();
   				
   				// 连接数据库
   				BookTableDAO dao=new BookTableDAO();
   				book=dao.findById(new Integer(id));
   				float price=book.getPrice();
   				sum=sum+price*count;
   			}
   		}
	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}