Java tutorial
//package com.java2s; import java.io.IOException; import java.io.StringReader; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.xml.sax.InputSource; import org.xml.sax.SAXException; public class Main { public static String getRequestID(String xml) throws ParserConfigurationException, SAXException, IOException { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); Document document = builder.parse(new InputSource(new StringReader(xml))); Node reqName = document.getElementsByTagName("request-id").item(0); if (reqName != null) return reqName.getTextContent(); else return null; } }