Java tutorial
//package com.java2s; import java.io.ByteArrayOutputStream; import javax.xml.transform.OutputKeys; import javax.xml.transform.Result; import javax.xml.transform.Source; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerConfigurationException; 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 byte[] doc2bytes(Document doc) { return doc2bytes(doc, false); } public static byte[] doc2bytes(Document doc, boolean formated) { try { Source source = new DOMSource(doc); ByteArrayOutputStream out = new ByteArrayOutputStream(); Result result = new StreamResult(out); Transformer transformer = TransformerFactory.newInstance().newTransformer(); transformer.setOutputProperty(OutputKeys.METHOD, "xml"); if (formated) { // linefeed formatting transformer.setOutputProperty(OutputKeys.INDENT, "yes"); } else { // remove xml header transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); } transformer.transform(source, result); return out.toByteArray(); } catch (TransformerConfigurationException e) { e.printStackTrace(); } catch (TransformerException e) { e.printStackTrace(); } return null; } }