使用JAX WS连接到SOAP

我想使用JAXWS在Java中构建一个肥皂客户端.我在Google上进行了搜索，但未找到任何相关信息.这是我尝试过的:

I want to build a soap client in java using JAXWS. I searched on google but didn't find any relevant information. Here is what I have tried:

     QName serviceName = new QName("urn:Site", "Site");
     QName portName = new QName("urn:Site", "Server_HandlerPort");
     String  endpointAddress = "http://myhost/url/soap";
     Service service = Service.create(serviceName);
     service.addPort(portName, SOAPBinding.SOAP11HTTP_BINDING, endpointAddress);
     Dispatch<SOAPMessage> dispatch = service.createDispatch(portName, SOAPMessage.class, Service.Mode.MESSAGE);
     BindingProvider bp = (BindingProvider) dispatch;
     MessageFactory factory = ((SOAPBinding) bp.getBinding()).getMessageFactory();
     SOAPMessage request = factory.createMessage();
     SOAPHeader header = request.getSOAPHeader();
     SOAPBody body = request.getSOAPBody();
     QName payloadName = new QName("session");
     SOAPBodyElement payload = body.addBodyElement(payloadName); 
     SOAPMessage reply = null;
     try {
        reply = dispatch.invoke(request);
    } catch (WebServiceException wse){
        wse.printStackTrace();
    }

    body = reply.getSOAPBody();
    QName responseName = new QName("urn:site","sessionResponse");
    SOAPBodyElement bodyElement = (SOAPBodyElement) body.getChildElements(responseName).next();
    System.out.println(bodyElement.getValue());

这不起作用.这总是返回null我不确定为什么?谁可以帮我这个事?有什么例子吗?做这样的事情?

This do not work. This always returns null I'm not sure why? Can anyone help me on this? Any example? for doing such thing?