faultDetail = "The expected argument types are (...)

参考文章：http://www.voidcn.com/article/p-vtvvlhrf-bqw.html

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The expected argument types are (...) but the supplied types were (..,flex.messaging.io.amf.ASObject) and converted to ...

今天我用flex把数据写入数据库时出现了以上错误，具体错误信息如下：

body = (null)
? clientId = "B22F4C72-1C0B-6EC1-38BD-1BD38C12157E"
? correlationId = "3511E1F7-4186-A109-D816-A3EA69824AFF"
? destination = "adminDAOImpl"
? extendedData = (null)
? faultCode = "Server.ResourceUnavailable"
? faultDetail = "The expected argument types are (bean.Admin) but the supplied types were (flex.messaging.io.amf.ASObject) and converted to (null)."
? faultString = "Cannot invoke method 'AddAdmin'."
? headers = (Object)#1
? messageId = "B22F4C74-8D09-3BAF-E17B-2D89965CF469"
? rootCause = (mx.messaging.messages::ErrorMessage)#2
? ? body = (null)
? ? clientId = (null)
? ? correlationId = (null)
? ? destination = (null)
? ? extendedData = (null)
? ? faultCode = "Client.Message.Deserialize.InvalidType"
? ? faultDetail = (null)
? ? faultString = "Cannot convert type flex.messaging.io.amf.ASObject with remote type specified as 'null' to an instance of class bean.Admin"
? ? headers = (Object)#3
? ? messageId = "B22F4C74-8D1B-A98A-F69A-FA74FC38366F"
? ? rootCause = (null)
? ? timestamp = 1385729518045
? ? timeToLive = 0
? timestamp = 1385729518045
? timeToLive = 0

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错误截图如下：

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根据错误信息可知在as对象转为java对象时发生了错误，我的java vo类代码如下：

package bean;

public class Admin { //对应数据库表tbAdmin
	int id;
	String usrName;
	String usrPass;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getUsrName() {
		return usrName;
	}
	public void setUsrName(String usrName) {
		this.usrName = usrName;
	}
	public String getUsrPass() {
		return usrPass;
	}
	public void setUsrPass(String usrPass) {
		this.usrPass = usrPass;
	}
}

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我的as vo类代码如下:

package vo
{
	public class Admin
	{
		public var id:int;  
		public var usrName:String;  
		public var usrPass:String;  
		
		public function Admin()//构造函数
		{
			
		}
	}
}

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服务器端往数据库写入java vo类对象的代码如下：

@Override
	public int AddAdmin(Admin admin) { //添加管理员

				String sql="insert into tbAdmin(id,usrName,usrPass)" +
						" values (0?,'1?','2?')";
				sql=sql.replace("0?",String.valueOf(admin.getId()));
				sql=sql.replace("1?",admin.getUsrName());
				sql=sql.replace("2?",admin.getUsrPass());
				System.out.println(sql);
				return DbCRUD.Add(sql);
	}

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flex端调用远程对象的代码如下：

//增加用户
			import vo.Admin;//导入包
			protected function btnAdd_clickHandler(event:MouseEvent):void
			{
				//创建对象
				 var admin:Admin=new Admin();
				admin.id=int(txbId.text);
				admin.usrName=txbUsrName.text;
				admin.usrPass=txbUsrPass.text;  
				
				roAdmin.AddAdmin(admin);//调用远程对象
			}

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flex往数据库写入数据的步骤大致就是这样了，不料我执行以上代码时却出现了文章开始所说的错误，

为什么会出错呢？原来我们在定义as类时没有将其和远程java vo类关联起来，解决方法：

像下面这样定义as类即可：

package vo
{
	[RemoteClass(alias="bean.Admin")] //这句不能少
	public class Admin
	{
		public var id:int;  
		public var usrName:String;  
		public var usrPass:String;  
		
		public function Admin()//构造函数
		{
			
		}
	}
}

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注：

[RemoteClass(alias="这里写远程java vo类的全路径")] ，如：

[RemoteClass(alias="bean.Admin")]?

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您的十分满意是我追求的宗旨。

您的一点建议是我后续的动力。