java代码简单cookie代码

/**
 * @param key
 * @param MaxAge
 * @param cookieValue
 * @param response
 */
public static void saveCookie(String key,int MaxAge, String cookieValue,HttpServletResponse response){
    Cookie cookie = new Cookie(key, cookieValue);
    cookie.setMaxAge(MaxAge);
    cookie.setPath("/");
    response.addCookie(cookie);
}
//清除Cookie
public static void clearCookie(String key, HttpServletResponse response){
    Cookie cookie = new Cookie(key, null);
    cookie.setMaxAge(0);
    cookie.setPath("/");
    response.addCookie(cookie);
}
/**
 * 获得所要的cookie
 */
public static String  getCookie(String key,HttpServletRequest request){
    Cookie cookie[] =request.getCookies();
    String cookieValue = null;
    if(cookie!=null){
        for(int i=0;i<cookie.length;i++){
            if(key.equals(cookie[i].getName())){
                cookieValue =cookie[i].getValue();
                break;
            }
        }
    }
    return cookieValue;
}