Here you can find the source of writeXML(Document doc, File file)
public static void writeXML(Document doc, File file) throws Exception
//package com.java2s; /*//w w w. j a v a 2 s . com * JBoss, Home of Professional Open Source * Copyright 2013, Red Hat, Inc. and/or its affiliates, and individual * contributors by the @authors tag. See the copyright.txt in the * distribution for a full listing of individual contributors. * * 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 java.io.File; import java.io.FileOutputStream; import javax.xml.transform.OutputKeys; import javax.xml.transform.Result; import javax.xml.transform.Source; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import org.w3c.dom.Document; public class Main { public static void writeXML(Document doc, File file) throws Exception { Transformer t = TransformerFactory.newInstance().newTransformer(); t.setOutputProperty(OutputKeys.METHOD, "xml"); t.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); // NOI18N t.setOutputProperty(OutputKeys.INDENT, "yes"); // NOI18N t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4"); // NOI18N Source source = new DOMSource(doc); Result result = new StreamResult(new FileOutputStream(file)); t.transform(source, result); } }