解决 Flex模块切换后导致对象转换失败 注册信息丢失

在Flex下， 如果一个项目里面有多个模块时，在第一次加载Module是可以的。在第二次加载module时，“注册”信息会丢失。
即如下的[RemoteClass(alias="com.tjsoft.iess2.po.jxpg.TSysJxUser")]这一行代码；
所产生的错误信息为：
[RPC Fault faultString="Cannot invoke method 'save'." faultCode="Server.ResourceUnavailable" faultDetail="The expected argument types are (com.tjsoft.iess2.po.jxpg.TSysJxUser) but the supplied types were (flex.messaging.io.amf.ASObject) and converted to (null)."]
at mx.rpc::AbstractInvoker/http://www.adobe.com/2006/flex/mx/internal::faultHandler()[C:/autobuild/3.2.0/frameworks/projects/rpc/src/mx/rpc/AbstractInvoker.as:220]
at mx.rpc::Responder/fault()[C:/autobuild/3.2.0/frameworks/projects/rpc/src/mx/rpc/Responder.as:53]
at mx.rpc::AsyncRequest/fault()[C:/autobuild/3.2.0/frameworks/projects/rpc/src/mx/rpc/AsyncRequest.as:103]
at NetConnectionMessageResponder/statusHandler()[C:/autobuild/3.2.0/frameworks/projects/rpc/src/mx/messaging/channels/NetConnectionChannel.as:569]
at mx.messaging::MessageResponder/status()[C:/autobuild/3.2.0/frameworks/projects/rpc/src/mx/messaging/MessageResponder.as:222]

如下为解决办法：在要调用远程对象的Application文件里面，加上如下声明语句：
    import flash.net.registerClassAlias;
   import mx.messaging.messages.RemotingMessage;
    registerClassAlias("com.tjsoft.iess2.po.jxpg.TSysJxUser", JxUser);

下面是项目中的两个相关文件源代码作为示例
// ActionScript file
package jxpg
{
[Bindable]
    [RemoteClass(alias="com.tjsoft.iess2.po.jxpg.TSysJxUser")]
    public class JxUser
    {
        public var id:String;
   public var name:String;
   public var code:String;
   public var createtime:Date;
   public var password:String;
   public var deptid:String;
   public var remark:String;
   public var status:String;
   public var logintype:String;
   public var deptname:String;
    }

}

//Application file
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
xmlns:page="pager.*"
xmlns:dept="jxpg.*"
layout="absolute" verticalAlign="top"
    horizontalAlign="center" paddingTop="0"
    initialize="initApp()" creationComplete="onCreationComplete()" >
    <mx:Style source="skins/blue/blue.css"/>
    <mx:Script>
        <![CDATA[
        import jxpg.JxUser;
    import mx.controls.Alert;
    import mx.collections.ArrayCollection;
    import mx.rpc.events.*;
    import mx.events.ListEvent;
    import mx.managers.PopUpManager;
    import jxpg.utils;
    import mx.events.CloseEvent;
   
    //申请注册别名，使切换模块后仍然能正常通信
    import flash.net.registerClassAlias;
   import mx.messaging.messages.RemotingMessage;
    registerClassAlias("com.tjsoft.iess2.po.jxpg.TSysJxUser", JxUser); //这里才是重点
    }
        ]]>
</mx:Application>

参考资料1：http://blog.csdn.net/tintown/archive/2009/11/23/4859983.aspx
参考资料2：http://blog.csdn.net/sujun10/archive/2008/08/01/2750977.aspx