pretty print XML.java

public static String format(String unformattedXml) {
    try {
        DOMImplementationRegistry registry = DOMImplementationRegistry.newInstance();
        DOMImplementationLS impl = (DOMImplementationLS) registry.getDOMImplementation("LS");
        LSSerializer writer = impl.createLSSerializer();
        writer.getDomConfig().setParameter("format-pretty-print", Boolean.TRUE);
        writer.getDomConfig().setParameter("xml-declaration", Boolean.FALSE);
        LSOutput output = impl.createLSOutput();
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        output.setByteStream(out);
        writer.write(parseXmlFile(unformattedXml), output);
        String xmlStr = new String(out.toByteArray(), "UTF-8"); // Charset is extremely important
        return xmlStr;
    } catch (Exception e) {
        return unformattedXml;
    }
}

private static Document parseXmlFile(String in) {
    try {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        DocumentBuilder db = dbf.newDocumentBuilder();
        InputSource is = new InputSource(new StringReader(in));
        return db.parse(is);
    } catch (ParserConfigurationException e) {
        throw new RuntimeException(e);
    } catch (SAXException e) {
        throw new RuntimeException(e);
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}