Here you can find the source of toXmlString(Document doc)
public static String toXmlString(Document doc) throws Exception
//package com.java2s; // are made available under the terms of the Eclipse Public License v1.0 import java.io.StringWriter; 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.Document; public class Main { public static String toXmlString(Document doc) throws Exception { DOMSource domSource = new DOMSource(doc); StringWriter writer = new StringWriter(); StreamResult result = new StreamResult(writer); TransformerFactory tf = TransformerFactory.newInstance(); Transformer transformer = tf.newTransformer(); transformer.transform(domSource, result); writer.flush();/*from w w w .j a va 2s .c om*/ return writer.toString(); } }