Java tutorial
//package com.java2s; /** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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.transform.*; import javax.xml.xpath.XPath; import javax.xml.xpath.XPathExpressionException; import org.w3c.dom.*; public class Main { private Document document_; private XPath xpath_; public static String getAttributeValue(Node node, String attrName) throws TransformerException { String value = null; node = node.getAttributes().getNamedItem(attrName); if (node != null) { value = node.getNodeValue(); } return value; } public String getNodeValue(String xql) throws XPathExpressionException { String value = xpath_.compile(xql).evaluate(document_); return "".equals(value) ? null : value; } }