Here you can find the source of getAttributeValue(Element element, String name)
null if attribute not found or empty.
public static String getAttributeValue(Element element, String name)
//package com.java2s; /**/*from www .j a v a2s . com*/ * This file is part of SIMPL4(http://simpl4.org). * * Copyright [2014] [Manfred Sattler] <manfred@ms123.org> * * SIMPL4 is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * SIMPL4 is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with SIMPL4. If not, see <http://www.gnu.org/licenses/>. */ import org.w3c.dom.Element; import org.w3c.dom.NamedNodeMap; import org.w3c.dom.Node; public class Main { /** * Returns attribute value of a node or <code>null</code> if attribute name not found. * Specified attribute is searched on every call. * Consider {@link #getAllAttributes(org.w3c.dom.Node)} for better performances. */ public static String getAttributeValue(Node node, String attrName) { NamedNodeMap nmm = node.getAttributes(); for (int j = 0; j < nmm.getLength(); j++) { Node attribute = nmm.item(j); if (attribute.getNodeType() != Node.ATTRIBUTE_NODE) { continue; } String nodeName = attribute.getNodeName(); if (nodeName.equals(attrName)) { return attribute.getNodeValue(); } } return null; } /** * Get element's attribute value or <code>null</code> if attribute not found or empty. */ public static String getAttributeValue(Element element, String name) { String value = element.getAttribute(name); if (value.length() == 0) { value = null; } return value; } }