xiaohan

1.服務器端設置COOKIE
1)Cookie cookie = new Cookie(name, value);
2)cookie.setMaxAge(mills);
3)response.addCookie(cookie);
2.客戶端讀取cookie
1)ookie[] cookies = request.getCookies();
2)遍歷cookies，找到感興趣的cookie
3.修改cookie的值
1）String cookieValue = cookie.getCookieValue("cookiename“)；
    try{
         int cookieInt = Integer.parseInt(cookieValue);
    }catch(NumberFormatException nfe) { }
    Cookie c = new Cookie("cookiename", String.valueOf(cookieValue+1));
    response.addCookie(c);//不能簡單的setValue
2)要指示瀏覽器刪除一個cookie，只需將setMaxAge置為0