soap消息分析和soap消息的传递和处理（一）

WebService传递的时候实际上是传递一个SOAPMessage，我们来探究一下SOAPMessage的组成。

SOAPMessage由一个个的SOAP块组成，这些SOAPPart被封装到一个SOAPEnvelope（信封）中，信封中包括head和body。我们可以自己创建一个SOAPMessage发送到服务提供端，从而返回WebService调用结果。

WebService服务创建代码参考上篇，本篇探讨SOAPMessage的组成和发送。

TestClient.java

package com.smile.service;

import java.io.IOException;
import java.net.URL;

import javax.xml.namespace.QName;
import javax.xml.soap.MessageFactory;
import javax.xml.soap.SOAPBody;
import javax.xml.soap.SOAPBodyElement;
import javax.xml.soap.SOAPEnvelope;
import javax.xml.soap.SOAPException;
import javax.xml.soap.SOAPMessage;
import javax.xml.soap.SOAPPart;
import javax.xml.ws.Dispatch;
import javax.xml.ws.Service;

import org.junit.Test;

public class TestClient {
	private String wsdlUrl = "http://localhost:8889/ns?wsdl";
	private String ns = "http://service.smile.com/";
	@Test
	public void test(){
		try {
			//创建消息工厂
			MessageFactory factory = MessageFactory.newInstance();
			//根据消息工厂创建SOAPMessage
			SOAPMessage message = factory.createMessage();
			//创建SOAPPart
			SOAPPart part = message.getSOAPPart();
			//获取SOAPEnvelope soap信封
			SOAPEnvelope envelope = part.getEnvelope();
			//可以通过SOAPEnvelope获取head body等信息
			SOAPBody body = envelope.getBody();
			//根据QName 创建相应的节点
			QName qname = new QName("http://smile.web.com/webservice", "add", "ws");
			//
			//使用以下方式设置< > 会被转义
//			body.addBodyElement(qname).setValue("12");
			SOAPBodyElement element = body.addBodyElement(qname);
			element.addChildElement("a").setValue("1");
			element.addChildElement("b").setValue("2");
			try {
				message.writeTo(System.out);
			} catch (IOException e) {
				e.printStackTrace();
			}
		} catch (SOAPException e) {
			e.printStackTrace();
		}
	}
	
	@Test
	public void test2(){
		try {
			//创建服务（Service）
			URL url = new URL(wsdlUrl);
			QName sname = new QName(ns,"MyServiceImplService"); 
			Service service = Service.create(url, sname);
			//创建Dispatch
			Dispatch dispatch = service.createDispatch(new QName(ns,"MyServiceImplPort"),
				SOAPMessage.class,Service.Mode.MESSAGE);
			//创建消息工厂
			MessageFactory factory = MessageFactory.newInstance();
			//根据消息工厂创建SOAPMessage
			SOAPMessage message = factory.createMessage();
			//创建SOAPPart
			SOAPPart part = message.getSOAPPart();
			//获取SOAPEnvelope soap信封
			SOAPEnvelope envelope = part.getEnvelope();
			//可以通过SOAPEnvelope获取head body等信息
			SOAPBody body = envelope.getBody();
			
			//根据QName 创建相应的节点
			QName ename = new QName(ns, "add", "ws");
			//
			//使用以下方式设置< > 会被转义
//			body.addBodyElement(qname).setValue("12");
			SOAPBodyElement element = body.addBodyElement(ename);
			element.addChildElement("a").setValue("22");
			element.addChildElement("b").setValue("33");
			message.writeTo(System.out);
			System.out.println("\t");
			System.out.println("Invoking.....");
			SOAPMessage response = dispatch.invoke(message);
			response.writeTo(System.out);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}