Here you can find the source of serializeToXml(Node node, OutputStream out)
public static void serializeToXml(Node node, OutputStream out) throws TransformerException
//package com.java2s; /*/*from w w w . jav a 2 s . c om*/ * #%L * Xacml4J Core Engine Implementation * %% * Copyright (C) 2009 - 2014 Xacml4J.org * %% * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program 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 Lesser Public License for more details. * * You should have received a copy of the GNU General Lesser Public * License along with this program. If not, see * <http://www.gnu.org/licenses/lgpl-3.0.html>. * #L% */ import java.io.OutputStream; import javax.xml.transform.OutputKeys; import javax.xml.transform.Result; 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.Node; import com.google.common.base.Preconditions; public class Main { private static TransformerFactory transformerFactory; public static void serializeToXml(Node node, OutputStream out) throws TransformerException { serializeToXml(node, out, true, false); } public static void serializeToXml(Node node, OutputStream out, boolean omitXmlDecl, boolean prettyPrint) throws TransformerException { Preconditions.checkNotNull(node); Preconditions.checkNotNull(out); Preconditions.checkState(transformerFactory != null); Transformer t = transformerFactory.newTransformer(); t.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, omitXmlDecl ? "yes" : "no"); t.setOutputProperty(OutputKeys.METHOD, "xml"); t.setOutputProperty(OutputKeys.INDENT, prettyPrint ? "yes" : "no"); DOMSource source = new DOMSource(node); Result result = new StreamResult(out); t.transform(source, result); } }