D-Net

import java.io.*;

import java.nio.charset.Charset;

import javax.xml.transform.*;

import javax.xml.transform.dom.DOMResult;

import javax.xml.transform.dom.DOMSource;

import javax.xml.transform.stream.StreamResult;

import org.apache.commons.lang.CharSetUtils;

	private String doIndent(final Document document) throws TransformerException, UnsupportedEncodingException {

		final Transformer transformer = getTransformer();

		final ByteArrayOutputStream out = new ByteArrayOutputStream();

		transformer.transform(new DOMSource(document), new StreamResult(out));

		return out.toString("utf-8");

	}

	private Transformer getTransformer() throws TransformerConfigurationException {

		TransformerFactory tf = TransformerFactory.newInstance();

		Transformer transformer = tf.newTransformer();

		transformer.setOutputProperty(OutputKeys.INDENT, "yes");

		transformer.setOutputProperty(OutputKeys.DOCTYPE_PUBLIC, "yes");

		transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");

		return transformer;

	}

	private Document doIndentDocument(final Document document) throws TransformerException, UnsupportedEncodingException {

		final Transformer transformer = getTransformer();

		final DOMResult out = new DOMResult();

		transformer.transform(new DOMSource(document), out);

		return (Document) out.getNode();

	}

	/**

	 * Static helper Apply.

	 *

	 * @param xml

	 *            the xml

	 * @return the indented xml string

	 */

	public static Document apply(final Document xml) throws TransformerException, UnsupportedEncodingException {

		return new IndentXmlString().doIndentDocument(xml);

	}