flex 客户端缓存SharedObject

读取缓存：

usernameSO = SharedObject.getLocal('username');

                    if (usernameSO)

                    {

                        usernameSOAL = usernameSO.data['username'] as ArrayList;

                        if(usernameSOAL)

                        {

                            var u:Object=usernameSOAL.getItemAt(0);

                            username.text=u.username;

                        }

                    }

写入缓存：

var u:Object=new Object();

                    u.username=n;

                    var array:ArrayList=new ArrayList();

                    array.addItem(u);

                    usernameSO.data['username']=array;

                    usernameSO.flush();