Java Utililty Methods XML Document to String

byte[] ret = null;
TransformerFactory tFactory = TransformerFactory.newInstance();
tFactory.setAttribute("indent-number", new Integer(4));
Transformer transformer = tFactory.newTransformer();
DOMSource source = new DOMSource(document);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
StreamResult result = new StreamResult(bos);
transformer.setOutputProperty(OutputKeys.METHOD, "xml"); 
...

ByteArrayOutputStream baos = new ByteArrayOutputStream();
writeXML(d, baos);
baos.close();
return baos.toByteArray();

TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.setOutputProperty("omit-xml-declaration", "yes");
StringWriter writer = new StringWriter();
transformer.transform(new DOMSource(xmlDoc), new StreamResult(writer));
String output = writer.getBuffer().toString();
return output;

return elementToString(doc.getDocumentElement());

String output = null;
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer;
try {
    transformer = transformerFactory.newTransformer();
    StringWriter writer = new StringWriter();
    transformer.transform(new DOMSource(doc), new StreamResult(writer));
    output = writer.getBuffer().toString().replaceAll("\n|\r", "");
...

return XML_BUILDER.get().parse(xmlURI).getDocumentElement();

try {
    StringWriter sw = new StringWriter();
    TransformerFactory tf = TransformerFactory.newInstance();
    Transformer transformer = tf.newTransformer();
    transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
    transformer.setOutputProperty(OutputKeys.METHOD, "xml");
    transformer.setOutputProperty(OutputKeys.INDENT, "yes");
    transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
...

if (doc == null) {
    return "";
String xmlDocString = "";
try {
    StringWriter writer = new StringWriter();
    TransformerFactory transformerFactory = TransformerFactory.newInstance();
    Transformer transformer = transformerFactory.newTransformer();
...

try {
    DOMSource domSource = new DOMSource(doc);
    StringWriter writer = new StringWriter();
    StreamResult result = new StreamResult(writer);
    TransformerFactory tf = TransformerFactory.newInstance();
    Transformer transformer = tf.newTransformer();
    transformer.transform(domSource, result);
    return writer.toString();
...

try {
    Source source = new DOMSource(document);
    StringWriter stringWriter = new StringWriter();
    Result result = new StreamResult(stringWriter);
    TransformerFactory factory = TransformerFactory.newInstance();
    Transformer transformer = factory.newTransformer();
    transformer.transform(source, result);
    return stringWriter.getBuffer().toString();
...