Formating XML for Pretty Printing

The following Class is an example which we can use to Pretty Printing XML.

method parseXmlString() reads a String and build a Document Object.
method formatXMLString() uses Transformer Object's Outputproperties to set features like Encoding, Indentation etc.
public class XmlFormatter {

    public String formatXMLString(String string) throws Exception {
        final Document document = parseXmlString(string);
        Transformer tf = TransformerFactory.newInstance().newTransformer();
        tf.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
        tf.setOutputProperty(OutputKeys.INDENT, "no");
        tf.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
        Writer out = new StringWriter();
        tf.transform(new DOMSource(document), new StreamResult(out));
        return out.toString();
    }


    private Document parseXmlString(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);
        }
    }