faultDetail = "The expected argument types are (...) but the supplied types were

参考文章：​​http://javacrazyer.iteye.com/blog/745761​​

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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。