求助！Web Service客户端问题!开发好的web服务，调用时有问题！求指教！

[robin_jh]

我开发好了一个web服务，url是http://localhost:8080/Machining，对外开放的接口是要接收三个double型的数据，但是我编写客户端的时候，出错，请大家指教！

package client;

import javax.xml.namespace.QName;

import org.apache.axis2.AxisFault;
import org.apache.axis2.addressing.EndpointReference;
import org.apache.axis2.client.Options;
import org.apache.axis2.rpc.client.RPCServiceClient;

public class WebClient {

public static void main(String[]args1)throws AxisFault{
RPCServiceClient serviceClient = new RPCServiceClient();
Options options = serviceClient.getOptions();

EndpointReference targeERP= new EndpointReference("http://localhost:8080/Machining");
options.setTo(targeERP);

QName opGetMilling = new QName("http://server","milling");//milling是要调用的操作名
Class[] returnTypes = new Class[]{double.class};

Object[] opGetMillingArgs = new Object[]{2,3,4};

Object[] response =serviceClient.invokeBlocking(opGetMilling,opGetMillingArgs,returnTypes);
double result = (double)response[0];

if(result==0){
System.out.println("服务调用失败");
return;
}

System.out.println(result);
}

}