Webservice中服务器端直接操作SOAP的XML内容

通常情况下,在JAX-WS2.0中是利用JAXB将传入的SOAP XML消息转换成JAVA的object,然后调用对应porttype的JAVA类的相应的方法,在完成调用后,再通过JAXB将返回参数转成SOAP XML.
JAX-WS还提供了另一种方法,让我们可以直接操作SOAP XML,通过让对应porttype的JAVA类实现 Provider<Source>接口,当服务器端收到SOAP消息后,会调用 Source invoke(Source payload) 方法,如果需要直接对XML进行操作,不想利用JAXB来做对象和XML的转换,可以用这种机制.
例子:(用CXF发布web service)参照http://blog.csdn.net/kkdelta/archive/2009/03/12/3984312.aspx了解CXF发布的步骤.
1,JAVA 类
package com.cxfwsp.test;
import java.io.StringReader;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import javax.xml.ws.Provider;
import javax.xml.ws.Service;
import javax.xml.ws.ServiceMode;
import javax.xml.ws.WebServiceProvider;
@WebServiceProvider(serviceName = "TestWSProviderService", portName = "TestWSProviderPort", targetNamespace = "http://test.cxfwsp.com/", wsdlLocation = "wsdl/prjCXFWSP.wsdl")
@ServiceMode(Service.Mode.PAYLOAD)
public class TestWSProvider implements Provider<Source> {
    public Source invoke(Source payload) {
        //System.out.println(payload);
        //DOMSource domsrc = (DOMSource)payload;
        try{
           
            Transformer tFormer = TransformerFactory.newInstance().newTransformer();
           
            Result result = new StreamResult(System.out);
            tFormer.transform(payload, r