Here you can find the source of readXml(File file)
public static Document readXml(File file) throws ParserConfigurationException, IOException, SAXException
//package com.java2s; /**/*w w w.ja v a 2 s . c om*/ * 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 * <p/> * http://www.apache.org/licenses/LICENSE-2.0 * <p/> * 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 java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import javax.xml.XMLConstants; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import org.w3c.dom.Document; import org.xml.sax.InputSource; import org.xml.sax.SAXException; public class Main { public static Document readXml(File file) throws ParserConfigurationException, IOException, SAXException { return readXml(new FileInputStream(file)); } public static Document readXml(InputStream input) throws ParserConfigurationException, IOException, SAXException { DocumentBuilderFactory f = DocumentBuilderFactory.newInstance(); f.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, Boolean.TRUE); DocumentBuilder b = f.newDocumentBuilder(); return b.parse(input); } public static Document readXml(InputSource source) throws ParserConfigurationException, IOException, SAXException { DocumentBuilderFactory f = DocumentBuilderFactory.newInstance(); f.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, Boolean.TRUE); DocumentBuilder b = f.newDocumentBuilder(); return b.parse(source); } }