package
{
       importflash.net.SharedObject;
       importflash.system.Security;
       importflash.system.SecurityPanel;
       public classcookie
       {
             private varso:SharedObject;
             private var_name:String
             publicfunction cookie(file_name:String)
             {
                  //constructor code
                  so =SharedObject.getLocal(file_name,"/");
                 _name=file_name
             }
             publicfunction flushData(key:String,value:*):void
             {
                 //添加数据
                  if(so.data.cookie == null)
                  {
                       varobj:Object = {};
                       obj[key] =value;
                       so.data.cookie= obj;
                  }else
                  {
                       so.data.cookie[key]= value;

                  }
                 trace(key+":"+so.data.cookie[key]);
                 flush();
             }
             publicfunction deleteData(key:String):void
             {
                 //删除数据值
                  if(judge(key))
                  {
                       deleteso.data.cookie[key];
                       flush();
                  }
             }
             publicfunction getName():String
             {
                 //获取数据名
                  return_name
             }
             publicfunction getData(key:String):*
             {
                 //获取数据值
                  if(judge(key))
                  {
                       returnso.data.cookie[key];
                  }else
                  {
                       returnnull;
                  }
             }
             publicfunction clearData():void
             {
                 //清除缓存
                 so.clear();
             }
             publicfunction judge(key:String):Boolean
             {
                 //判断数据是否存在
                  returnso.data.cookie != undefined && so.data.cookie[key] !=undefined

             }
             privatefunction flush():void
             {
                 //写入
                  if(so)
                  {
                       try
                       {
                            so.flush();
                       }
                       catch(e:Error)
                       {
                            Security.showSettings();
                            Security.showSettings( SecurityPanel.LOCAL_STORAGE );
                       }
                  }
             }

       }

}

标注的都比较清楚，直接实例化，调用方法可以了，附件为cookie.as文件