写入soap消息以及与soap消息通信

1.些了解一下soap消息的结构以及通信方式如下图：

2.利用SOAPMessage创建soap消息，代码如下：

public void writeSoap(){
        try {
            //通过MessageFactory创建SOAPMessage
            MessageFactory mf = MessageFactory.newInstance();
            SOAPMessage sm = mf.createMessage();
            //由SOAPMessage创建SOAPPart->SOAPEnvelope->SOAPBody或SOAPHeader
            SOAPPart sp = sm.getSOAPPart();
            SOAPEnvelope se = sp.getEnvelope();
            SOAPBody sb = se.getBody();
            //通过QName创建消息体
            QName qn = new QName("http://www.xiaoqiaolv.com/lv", "plus", "tns");
            SOAPBodyElement sq = sb.addBodyElement(qn);
            sq.setValue("123456");
            sq.setAttribute("att", "lv");
            sq.addChildElement("a").setValue("12");
            sq.addChildElement("b").setValue("23");
            //消息写出
            sm.writeTo(System.out);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

3.利用Dispatch 接口提供对动态调用服务端点操作的支持，javax.xml.ws.Service 接口作为创建 Dispatch 实例的工厂。实现代码如下：

//与SOAP消息通信用到Dispatch传输
    public void transferSoap(){
        URL url = null;
        String ns = "http://soap.ws.com/";
        try {
            //创建服务代理Service得到远程操作的动态面向消息调用的dispatch
            url = new URL("http://localhost:9898/ws?wsdl");
            QName qn = new QName(ns, "PlusServiceImplService");
            Service service = Service.create(url, qn);
            Dispatch<SOAPMessage> dis = service.createDispatch(
                    new QName(ns,"PlusServiceImplPort"),
                    SOAPMessage.class, 
                    Service.Mode.MESSAGE);
            //创建消息SOAPMessage
            SOAPMessage msg  = MessageFactory.newInstance().createMessage();
            SOAPEnvelope se = msg.getSOAPPart().getEnvelope();
            SOAPBody sb = se.getBody();
            //创建消息体确定传输的节点
            QName qname = new QName(ns, "plus", "ns");
            SOAPBodyElement sbe = sb.addBodyElement(qname);
            sbe.addChildElement("arg0").setValue("12");
            sbe.addChildElement("arg1").setValue("32");
            msg.writeTo(System.out);
            System.out.println();
            System.out.println("invoking...");
            //用Dispatch调用本地创建的消息传输到远程服务并返回内容
            SOAPMessage response = dis.invoke(msg);
            response.writeTo(System.out);
            System.out.println();
            //提取我们需要的信息
            Document doc = response.getSOAPPart().getEnvelope().getBody().extractContentAsDocument();
            String result = doc.getElementsByTagName("return").item(0).getTextContent();
            System.out.println(result);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }