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A Transformer can be used to write the XML for a DOM Document to a String. As the name implies a Transformer transforms a Source object into a Result, in this case the Source is the DOM Document, and the Result is a StringWriter (which the resulting XML String can be extracted from).

TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer();
StringWriter writer = new StringWriter();
Result result = new StreamResult(writer);
Source source = new DOMSource(document);
transformer.transform(source, result);
writer.close();
String xml = writer.toString();

written by objects \\ tags: Document, DOM, StringWriter, Transformer