Here you can find the source of serializeXML(Node e, Writer out)
public static void serializeXML(Node e, Writer out) throws Exception
//package com.java2s; import java.io.StringWriter; import java.io.Writer; 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 org.w3c.dom.Node; public class Main { public static void serializeXML(Node e, Writer out) throws Exception { DOMSource domSource = new DOMSource(e); StreamResult streamResult = new StreamResult(out); TransformerFactory tf = TransformerFactory.newInstance(); Transformer serializer = tf.newTransformer(); // turn off <?xml...?> stuff as for documents that were parsed with // non-UTF8 encoding, serializer inserts encoding="[non-utf-8]" there which // it should not, since we always serialize as UTF-8 serializer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); serializer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); // serializer.setOutputProperty(OutputKeys.INDENT, "yes"); serializer.transform(domSource, streamResult); }/*from w ww . j a v a 2s . c o m*/ public static String serializeXML(Node e) throws Exception { StringWriter result = new StringWriter(); serializeXML(e, result); return result.toString(); } }