changenumservlet.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 ChangeNumServlet extends HttpServlet {


	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
    String mp3No=request.getParameter("mp3No");
    String newNo=request.getParameter("newNo");
   
    
    HttpSession session=request.getSession();
    Map<String,Mp3> buyMp3List=(Map<String,Mp3>)session.getAttribute("buyMp3List");
    if(buyMp3List!=null){
    	if(buyMp3List.containsKey(mp3No)){
    		Mp3 buyMp3=buyMp3List.get(mp3No);
    		int newNN=Integer.parseInt(buyMp3.getBuyNo());
    		
    		try {
				newNN = Integer.parseInt(newNo);
			} catch (Exception e) {
				// TODO: handle exception
			}
			buyMp3.setBuyNo(newNN+"");
			buyMp3List.put(mp3No,buyMp3);
    	}
    	
    }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);
	}

}