cookie-显示用户上次访问网站的时间

    
    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        //防止中文乱码
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out=response.getWriter();
        out.write(" 你上次访问的时间是：");
        //获取本地的cookie
        Cookie[] cookies=request.getCookies();
        for(int i=0;cookies!=null && i<cookies.length;i++){
            if(("lastAccessTime").equals(cookies[i].getName())){
            //字符串的日期转换为long，在通过Date转化为日期，通过toLocalString 来输出
            Long cookieValue=Long.parseLong(cookies[i].getValue());
            Date date=new Date(cookieValue);
            out.write(" 你上次访问的时间是：");
            out.write(date.toLocaleString());
            }
        }
        //把cookie写回本地去
        Cookie cookie=new Cookie("lastAccessTime",System.currentTimeMillis()+"");
        cookie.setMaxAge(1*24*3600);
        cookie.setPath("/day08");
        response.addCookie(cookie);
    }