Java tutorial
import java.io.StringReader; import java.io.StringWriter; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.xml.sax.InputSource; public class Main { public static String getXMLData() { return "<a attr='value'></a>"; } public static void main(String[] argv) throws Exception { DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); Document doc = factory.newDocumentBuilder().parse(new InputSource(new StringReader(getXMLData()))); createElement(doc.getDocumentElement(), "new"); System.out.println(documentToString(doc)); } public static Element createElement(Element parent, String name) { Document document; Element element; document = parent.getOwnerDocument(); element = document.createElement(name); parent.appendChild(element); return element; } public static String documentToString(Document document) { try { TransformerFactory tf = TransformerFactory.newInstance(); Transformer trans = tf.newTransformer(); StringWriter sw = new StringWriter(); trans.transform(new DOMSource(document), new StreamResult(sw)); return sw.toString(); } catch (TransformerException tEx) { tEx.printStackTrace(); } return null; } }