XmlIndent.java

public class XmlIndent {
    /*
     * Format XML with indentation
     */
    private static String prettyFormat(InputStream input, int indent) {
        try {
            Source xmlInput = new StreamSource(input);
            StringWriter stringWriter = new StringWriter();
            StreamResult xmlOutput = new StreamResult(stringWriter);
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
            transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", String.valueOf(indent);
            transformer.transform(xmlInput, xmlOutput);
            return xmlOutput.getWriter().toString();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}