cookie实现上次访问时间和清除上次访问时间

package cookie;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Date;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
//网站首页
public class CookieDemo1 extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");

PrintWriter out = response.getWriter();
out.print("<a href='/Cookie/servlet/CookieDemo2'>清楚上次访问时间</a><br/>");
out.print("您上次访问时间是： ");

//获得用户的时间cookie
Cookie cookies[] = request.getCookies();
for(int i=0;cookies!=null && i<cookies.length;i++){
if(cookies[i].getName().equals("lastAccessTime")){
long cookieValue = Long.parseLong(cookies[i].getValue());
Date date = new Date(cookieValue);
out.print(date.toLocaleString());
}
}

//给用户回送最新的访问时间
Cookie cookie = new Cookie("lastAccessTime",System.currentTimeMillis()+"");
//设置有效期(默认浏览器进程)
cookie.setMaxAge(1*30*24*3600);
//设置有效路径
cookie.setPath("/Cookie");

response.addCookie(cookie);
}

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

}

package cookie;

import java.io.IOException;

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

public class CookieDemo2 extends HttpServlet {

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

Cookie cookie = new Cookie("lastAccessTime",System.currentTimeMillis()+"");
cookie.setMaxAge(0);
cookie.setPath("/Cookie");
response.addCookie(cookie);

//response.sendRedirect("/Cookie/servlet/CookieDemo1");

}

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

}