javaee/JavaEEDZY/src/org/zhichunqi/logout/Logout.java

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package org.zhichunqi.logout;

import java.io.IOException;
import java.io.PrintWriter;

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

import org.apache.log4j.Logger;

public class Logout extends HttpServlet {
	Logger log = Logger.getLogger("org.zhichunqi.www.Logout");
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		HttpSession session = request.getSession();
		String exit = request.getParameter("exit");
		if (exit != null){
			if(exit.equals("true")){
				Cookie[] cookies = request.getCookies();
				if(cookies != null) {
					for(Cookie c:cookies) {
						if (c.getName().equals("number")) {
							c.setMaxAge(0);
				            response.addCookie(c);
						}
					}
				}
				session.setAttribute("message", "");
				session.setAttribute("number", "");
			}
		}
		log.info("用户已退出！");
		response.sendRedirect("ZhaoLing");
	}
}