Java Utililty Methods XML Document to String

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");
...

DOMImplementationRegistry registry;
try {
    registry = DOMImplementationRegistry.newInstance();
    DOMImplementationLS domImplLS = (DOMImplementationLS) registry.getDOMImplementation("LS");
    LSSerializer ser = domImplLS.createLSSerializer(); 
    LSOutput out = domImplLS.createLSOutput();
    StringWriter stringOut = new StringWriter(); 
    out.setCharacterStream(stringOut);
...

try {
    TransformerFactory tf = TransformerFactory.newInstance();
    Transformer t = tf.newTransformer();
    StreamResult sr = new StreamResult(new File(nome));
    DOMSource doms = new DOMSource(doc);
    t.setOutputProperty(OutputKeys.INDENT, "yes");
    t.transform(doms, sr);
} catch (Exception e) {
...

if (document == null) {
    return new StringBuffer();
return transformToString(new DOMSource(document), null);

String result = null;
StringWriter strWtr = new StringWriter();
TransformerFactory transformerFactory = TransformerFactory.newInstance();
Transformer transformer = transformerFactory.newTransformer();
if (document != null) {
    StreamResult strResult = new StreamResult(strWtr);
    transformer.transform(new DOMSource(document.getDocumentElement()), strResult);
    result = strResult.getWriter().toString();
...

StringWriter sw = new StringWriter();
tf.newTransformer().transform(new DOMSource(doc), new StreamResult(sw));
return sw.toString();

StringWriter writer = new StringWriter();
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer();
transformer.transform(new DOMSource(doc), new StreamResult(writer));
return writer.toString();

Source source = new DOMSource(document);
StringWriter sw = new StringWriter();
Result streamResult = new StreamResult(sw);
try {
    Transformer transformer = TransformerFactory.newInstance().newTransformer();
    transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
    transformer.setOutputProperty(OutputKeys.INDENT, "no");
    transformer.transform(source, streamResult);
...

Transformer transformer = TransformerFactory.newInstance().newTransformer();
if (prettyXml) {
    transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
transformer.transform(new DOMSource(node), new StreamResult(baos));
return baos.toString("UTF-8");
...

Document document = getDocument(resource);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
StringWriter writer = new StringWriter();
transformer.transform(new DOMSource(document), new StreamResult(writer));
String output = writer.getBuffer().toString().replaceAll("\n|\r", "");
return output;
...