Here you can find the source of transformDocToFile(Document doc, File file)
public static File transformDocToFile(Document doc, File file) throws TransformerException
//package com.java2s; /**/*from w w w .j a v a 2 s .c o m*/ * 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 javax.xml.transform.OutputKeys; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerException; 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 File transformDocToFile(Document doc, File file) throws TransformerException { final TransformerFactory tf = TransformerFactory.newInstance(); final Transformer transformer = tf.newTransformer(); transformer.setOutputProperty(OutputKeys.INDENT, "yes"); transformer.setOutputProperty( "{http://xml.apache.org/xslt}indent-amount", "4"); transformer.transform(new DOMSource(doc), new StreamResult(file)); return file; } }