removemp3servlet.java

运用jsp/servlet技术 通过bs方式 在网上购买MP3

package com.servlet;

import java.io.IOException;
import java.util.Map;

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.dto.Mp3;

public class RemoveMp3Servlet extends HttpServlet {


	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
            String mp3No=request.getParameter("mp3No");
            HttpSession session=request.getSession();
            Map<String,Mp3> buyMp3List=(Map<String,Mp3>)session.getAttribute("buyMp3List");
            if(buyMp3List!=null){
            	if(buyMp3List.containsKey(mp3No)){
            	  buyMp3List.remove(mp3No);
            	  
            	}
            	
            }else{
            	System.out.println("mp3不存在");
            }
	        response.sendRedirect("../jsp/BuyMp3List.jsp");
	}

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

	doGet(request,response);
	}

}