JAX-WS的相关问题，无法正确显示结果

Question

用eclipse LUNA版本做了一个Web Service的服务端，然后通过自动生成了客户端。我在客户端里写了个类，可是报错了，不知道该怎么办，求各位大神帮忙。在测试WS的时候是可以的

以下是客户端的类
public class MyJDBCClient {
/**

• @param args
  */
  public static void main(String[] args) {
  // TODO Auto-generated method stub
  try
  {
  MyJDBCService service = new MyJDBCServiceLocator();
  MyJDBCProxy client = (MyJDBCProxy) service.getMyJDBC();

  String readResult = client.read(1);
  System.out.println(readResult);

      String writeResult = client.write(9, "JACK ROSE", "E:/Folder/some.doc"); 
      System.out.println(writeResult);
  

}
catch (Exception e)
{
System.err.println("Execution failed. Exception: " + e);
}
}

}
以下是抛出的异常：
警告: Unable to find required classes (javax.activation.DataHandler and javax.mail.internet.MimeMultipart). Attachment support is disabled.
Execution failed. Exception: java.lang.ClassCastException: server.MyJDBCSoapBindingStub cannot be cast to server.MyJDBCProxy
该如何解决，求指导