用Java开发WebService Axis，怎么把请求内容打印下来？ 400 请求报错 

import java.rmi.RemoteException;
import javax.xml.rpc.ParameterMode;

import javax.xml.rpc.ServiceException;
import javax.xml.soap.SOAPException;
import org.apache.axis.client.Call;

import org.apache.axis.client.Service;
import org.apache.axis.encoding.XMLType;
import org.apache.axis.message.SOAPHeaderElement;
public class SOAPHepler {

	public static void main(String[] args) throws ServiceException, RemoteException {
		try {
			String endpointURL = "http://122.228.134.30:2121/EtoneWebService.asmx?WSDL";
			Service service = new Service();
			Call call = (Call) service.createCall();
			call.setTargetEndpointAddress(new java.net.URL(endpointURL));
			call.setSOAPActionURI("http://tempuri.org/" + "getPhoneArea");
			call.setOperationName("getPhoneArea"); 
			SOAPHeaderElement soapHeaderElement = new SOAPHeaderElement("http://tempuri.org/", "etoneSoapHeader");
			soapHeaderElement.setNamespaceURI("http://tempuri.org/");
			try {
				soapHeaderElement.addChildElement("UserName").setValue("admin");
				soapHeaderElement.addChildElement("Password").setValue("123");
			}
			catch (SOAPException e)	{
				e.printStackTrace();
			}
			call.addHeader(soapHeaderElement);
			call.setReturnType(XMLType.XSD_STRING);
			call.addParameter("mobile", XMLType.XSD_STRING, ParameterMode.IN);
			String ret = (String) call.invoke(new Object[] { "18268136200" });
			System.out.println(ret);
			
		}
		catch (Exception e) {
			e.printStackTrace();
		}
	}
}