XMLUtils to print XML Document Object as String

XMLUtils.java

import java.io.StringReader;
import java.io.StringWriter;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.xml.sax.InputSource;

/**
 * @author Siva
 *
 */
public class XMLUtils
{
 public static void main(String[] args)
 {
  String xml = "<tag><nested>hello</nested></tag>";
  Document document = getStringAsXmlDocument(xml);
  System.out.println(getDocumentAsString(document));
 }
 
 public static String getDocumentAsString(Document document)
 {
  String output = null;
  try
  {
   TransformerFactory tf = TransformerFactory.newInstance();
   Transformer transformer = tf.newTransformer();
   //transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
   transformer.setOutputProperty(OutputKeys.INDENT, "yes");
   StringWriter writer = new StringWriter();
   transformer.transform(new DOMSource(document), new StreamResult(writer));
   output = writer.getBuffer().toString();
  } catch (Exception e)
  {
   //e.printStackTrace();
   throw new RuntimeException(e);
  }
  return output;
 }
 
 public static Document getStringAsXmlDocument(String xml)
 {
  Document xmlDoc = null;
  try
  {
   DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
      dbf.setValidating(true);
      DocumentBuilder db = dbf.newDocumentBuilder();
      InputSource sourceXML = new InputSource(new StringReader(xml));
      xmlDoc = db.parse(sourceXML);
  } catch (Exception e)
  {
   //e.printStackTrace();
   throw new RuntimeException(e);
  }
     return xmlDoc;
 }
}