CXF WebService SpringBoot 添加拦截器，处理响应报文格式

描述

XFIRE升级CXF框架，但是对接的系统不做调整，这时候就要保证参数报文和响应报文和以前是一致的。但是不同的框架有不同的规则，想要将报文调整的一致，就需要用到拦截器拦截报文，自定义解析处理。
CXF框架本身就是支持配置自定义拦截器的，以下是案例。

响应拦截器案例

package com.xinyuan.model.thirdparty.cxf.interceptor;
import org.apache.cxf.interceptor.AttachmentOutInterceptor;
import org.apache.cxf.io.CachedOutputStream;
import org.apache.cxf.message.Message;
import org.apache.cxf.phase.AbstractPhaseInterceptor;
import org.apache.cxf.phase.Phase;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.OutputStream;
import java.io.StringReader;
import java.io.StringWriter;public class NamespacePrefixInterceptor extends AbstractPhaseInterceptor<Message> {public NamespacePrefixInterceptor() {// 在发送消息之前的阶段进行拦截super(Phase.PRE_STREAM);// 添加依赖的拦截器addAfter(AttachmentOutInterceptor.class.getName());}@Overridepublic void handleMessage(Message message) {try {// 获取输出流OutputStream outputStream = message.getContent(OutputStream.class);if (outputStream == null) {return;}// 使用 CachedOutputStream 缓存输出流，以便我们可以读取和修改它CachedOutputStream cachedOutputStream = new CachedOutputStream();message.setContent(OutputStream.class, cachedOutputStream);// 在拦截器处理完毕后，将缓存的输出流写回到原始输出流中message.getInterceptorChain().doIntercept(message);// 读取缓存的输出流内容try (CachedOutputStream cos = cachedOutputStream) {String response = new String(cos.getBytes());// 在这里对 response 进行处理String modifiedResponse = processResponse(response);// 将处理后的内容写回到输出流中try (OutputStream finalOutputStream = outputStream) {finalOutputStream.write(modifiedResponse.getBytes());}}} catch (Exception e) {e.printStackTrace();}}private String processResponse(String response) {//在这里写处理报文的逻辑return response;}}

• 在发布接口的代码处，添加拦截器
  

通过dom的方式解析xml，并为满足条件的元素添加属性

	public static void main(String[] args){String xml = "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">\n" +"   <soap:Body>\n" +"      <ns1:queryGysxxResponse xmlns:ns1=\"http://iface.xt.service.zzxy.com\" xmlns=\"http://entity.service.zzxy.com\">\n" +"         <ns1:out>\n" +"            <cz>111</cz>\n" +"            <dh xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <dzyx xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <frdbmc xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <gsdz xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <gysbh>gysbh</gysbh>\n" +"            <gysmc xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <khhmc xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <khhzh xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <lxrmc xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <sj xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <xxdz xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <yzbh xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <zzjgdmh xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"         </ns1:out>\n" +"      </ns1:queryGysxxResponse>\n" +"   </soap:Body>\n" +"</soap:Envelope>";try {// 创建DocumentBuilderFactory对象DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();// 设置命名空间感知factory.setNamespaceAware(true);// 创建DocumentBuilder对象DocumentBuilder builder = factory.newDocumentBuilder();// 解析XML字符串Document document = builder.parse(new InputSource(new StringReader(xml)));// 获取<ns1:out>元素NodeList outNodes = document.getElementsByTagNameNS("http://iface.xt.service.zzxy.com", "out");if (outNodes.getLength() > 0) {Element outElement = (Element) outNodes.item(0);// 获取<ns1:out>元素下的所有子节点NodeList childNodes = outElement.getChildNodes();for (int i = 0; i < childNodes.getLength(); i++) {Node childNode = childNodes.item(i);if (childNode.getNodeType() == Node.ELEMENT_NODE) {// 修改子节点的命名空间//((Element) childNode).setNamespaceURI("http://entity.service.zzxy.com");((Element) childNode).setAttribute("a","http://entity.service.zzxy.com");}}}// 输出修改后的XMLTransformerFactory transformerFactory = TransformerFactory.newInstance();Transformer transformer = transformerFactory.newTransformer();DOMSource source = new DOMSource(document);StreamResult result = new StreamResult(System.out);transformer.transform(source, result);} catch (Exception e) {e.printStackTrace();}}

dom4j的方式解析xml，对满足条件的元素添加命名空间

public static void main(String[] args) throws DocumentException {String xml = "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">\n" +"   <soap:Body>\n" +"      <ns1:queryGysxxResponse xmlns:ns1=\"http://iface.xt.service.zzxy.com\" xmlns=\"http://entity.service.zzxy.com\">\n" +"         <ns1:out>\n" +"            <cz>111</cz>\n" +"            <dh xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <dzyx xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <frdbmc xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <gsdz xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <gysbh>gysbh</gysbh>\n" +"            <gysmc xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <khhmc xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <khhzh xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <lxrmc xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <sj xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <xxdz xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <yzbh xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"            <zzjgdmh xsi:nil=\"true\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"/>\n" +"         </ns1:out>\n" +"      </ns1:queryGysxxResponse>\n" +"   </soap:Body>\n" +"</soap:Envelope>";try {SAXReader reader = new SAXReader();Document document = reader.read(new StringReader(xml));Element root = document.getRootElement();//printElementNames(root);//查找 <ns1:out> 元素Element ns1OutElement = root.element("Body").element("queryGysxxResponse").element("out");// 打印所有的元素名称printElementNames(ns1OutElement);setNamespaceForChildElements(ns1OutElement);} catch (DocumentException e) {e.printStackTrace();}}private static void setNamespaceForChildElements(Element element) {// 创建目标命名空间Namespace targetNamespace = new Namespace("", "http://entity.service.zzxy.com");// 遍历当前元素的所有子元素for (Object child : element.elements()) {if (child instanceof Element) {Element childElement = (Element) child;// 将子元素的 QName 更新为目标命名空间QName newQName = new QName(childElement.getName(), targetNamespace);childElement.setQName(newQName);}}}private static void printElementNames(Element element) {// 打印当前元素的名称System.out.println(element.getName());// 递归打印子元素的名称for (Object child : element.elements()) {if (child instanceof Element) {printElementNames((Element) child);}}
}