AS3 Cookie类

package com.klstudio.util
{
    import flash.net.SharedObject;
    public class Cookie
    {
        private var _time:uint;
        private var _name:String;
        private var _so:SharedObject;

        public function Cookie(name:String = "klstudio", timeOut:uint = 3600)
        {
            _name = name;
            _time = timeOut;
            _so = SharedObject.getLocal(name, "/");
        }
        //清楚超时内容;   
        public function clearTimeOut():void
        {
            var obj:* = _so.data.cookie;
            if (obj == undefined)
            {
                return;
            }
            for (var key in obj)
            {
                if (obj[key] == undefined || obj[key].time == undefined || isTimeOut(obj[key].time))
                {
                    delete obj[key];
                }
            }
            _so.data.cookie = obj;
            _so.flush();
        }

        private function isTimeOut(time:uint):Boolean
        {
            var today:Date = new Date();
            return time + _time * 1000 < today.getTime();
        }

        //获取超时值;   
        public function getTimeOut():uint
        {
            return _time;
        }

        //获取名称;   
        public function getName():String
        {
            return _name;
        }

        //清除Cookie所有值;   
        public function clear():void
        {
            _so.clear();
        }

        //添加Cookie值   
        public function put(key:String, value:*):void
        {
            var today:Date = new Date();
            key = "key_" + key;
            value.time = today.getTime();
            if (_so.data.cookie == undefined)
            {
                var obj:Object = {};
                obj[key] = value;
                _so.data.cookie = obj;
            }
            else
            {
                _so.data.cookie[key] = value;
            }
            _so.flush();
        }
        //删除Cookie值;   
        public function remove(key:String):void
        {
            if (contains(key))
            {
                delete _so.data.cookie["key_" + key];
                _so.flush();
            }
        }
        //获取Cookie值;   
        public function get(key:String):Object
        {
            return contains(key) ? _so.data.cookie["key_" + key] : null;
        }
        //Cookie值是否存在;   
        public function contains(key:String):Boolean
        {
            key = "key_" + key;
            return _so.data.cookie != undefined && _so.data.cookie[key] != undefined;
        }
    }
}