Here you can find the source of saveXML(Document doc, File outfile, boolean indent)
@SuppressWarnings("UseSpecificCatch") public static boolean saveXML(Document doc, File outfile, boolean indent)
//package com.java2s; /* Copyright (c) 2016 by crossmobile.org * * CrossMobile 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, version 2. * * CrossMobile 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 CrossMobile; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA *//*from w w w. j a v a 2s .c om*/ import java.io.File; import java.io.FileOutputStream; import java.io.OutputStreamWriter; import javax.xml.transform.OutputKeys; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import javax.xml.xpath.XPathConstants; import javax.xml.xpath.XPathExpression; import javax.xml.xpath.XPathFactory; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.NodeList; public class Main { @SuppressWarnings("UseSpecificCatch") public static boolean saveXML(Document doc, File outfile, boolean indent) { try { Transformer transformer = TransformerFactory.newInstance().newTransformer(); DOMSource source = new DOMSource(doc); StreamResult result = new StreamResult(new OutputStreamWriter(new FileOutputStream(outfile), "UTF-8")); if (indent) { XPathFactory xpathFactory = XPathFactory.newInstance(); // XPath to find empty text nodes. XPathExpression xpathExp = xpathFactory.newXPath().compile("//text()[normalize-space(.) = '']"); NodeList emptyTextNodes = (NodeList) xpathExp.evaluate(doc, XPathConstants.NODESET); // Remove each empty text node from document. for (int i = 0; i < emptyTextNodes.getLength(); i++) { Node emptyTextNode = emptyTextNodes.item(i); emptyTextNode.getParentNode().removeChild(emptyTextNode); } transformer.setOutputProperty(OutputKeys.INDENT, "yes"); transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4"); } transformer.transform(source, result); return true; } catch (Exception ex) { return false; } } }