Java tutorial
//package com.java2s; /* * Copyright (c) 2013, University of Toronto. * * Licensed under the Apache License, Version 2.0 (the "License"); you may * not use this file except in compliance with the License. You may obtain * a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. */ import javax.xml.xpath.XPath; import javax.xml.xpath.XPathConstants; import javax.xml.xpath.XPathExpressionException; import javax.xml.xpath.XPathFactory; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; public class Main { static XPathFactory factory = XPathFactory.newInstance(); public static NodeList getNodesByPath(String path, Element localElement, Document doc) throws XPathExpressionException { // Note: if using absolute path, then the root element must also be specified, // that is, it should be like "/clinical_studies/clinical_study/..." XPath xpath = factory.newXPath(); Object element = path.startsWith("/") || localElement == null ? doc : localElement; NodeList nodeList = (NodeList) xpath.evaluate(path, element, XPathConstants.NODESET); return nodeList; } }