delallservlet.java

网上购物源代码

package com.chinaaccpservlet;

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

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

public class DelAllServlet extends HttpServlet {

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

		//response.setContentType("text/html;charset=utf-8");
		//request.setCharacterEncoding("utf-8");
		//response.setCharacterEncoding("utf-8");
		response.setHeader("param", "no-no-cache");
		response.setHeader("cache-control", "no-cache");
		HttpSession session = request.getSession();
		HashSet hs = (HashSet)session.getAttribute("set");
		HashMap hm = (HashMap)session.getAttribute("hashmap");
		PrintWriter out = response.getWriter();
		if(hs!=null)
		{
			hs.clear();
			session.setAttribute("set", hs);
		}
		if(hm!=null)
		{
			hm.clear();
			session.setAttribute("hashmap", hm);
		}
		RequestDispatcher dis = request.getRequestDispatcher("CartMessServlet");
		dis.forward(request, response);
		out.flush();
		out.close();
	}

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

		this.doGet(request, response);
	}

}