Here you can find the source of getXMLValue(String xml, String xQuery, QName resultType)
public static Object getXMLValue(String xml, String xQuery, QName resultType) throws XPathExpressionException, IOException, SAXException, ParserConfigurationException
//package com.java2s; /**/*from w w w. jav a2 s . c o m*/ * Copyright (c) Microsoft Corporation * <p/> * All rights reserved. * <p/> * MIT License * <p/> * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated * documentation files (the "Software"), to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and * to permit persons to whom the Software is furnished to do so, subject to the following conditions: * <p/> * The above copyright notice and this permission notice shall be included in all copies or substantial portions of * the Software. * <p/> * THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO * THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ import org.w3c.dom.Document; import org.xml.sax.InputSource; import org.xml.sax.SAXException; import javax.xml.namespace.QName; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.xpath.XPath; import javax.xml.xpath.XPathExpression; import javax.xml.xpath.XPathExpressionException; import javax.xml.xpath.XPathFactory; import java.io.IOException; import java.io.StringReader; public class Main { public static Object getXMLValue(String xml, String xQuery, QName resultType) throws XPathExpressionException, IOException, SAXException, ParserConfigurationException { DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); Document doc = db.parse(new InputSource(new StringReader(xml))); XPathFactory xPathfactory = XPathFactory.newInstance(); XPath xPath = xPathfactory.newXPath(); XPathExpression xPathExpression = xPath.compile(xQuery); return xPathExpression.evaluate(doc, resultType); } }