How to save parsed and changed DOM document in xml file?

Something like this works:

Transformer transformer = TransformerFactory.newInstance().newTransformer();Result output = new StreamResult(new File("output.xml"));Source input = new DOMSource(myDocument);transformer.transform(input, output);

That will work, provided you're using xerces-j:

public void serialise(org.w3c.dom.Document document) {  java.io.ByteArrayOutputStream data = new java.io.ByteArrayOutputStream();  java.io.PrintStream ps = new java.io.PrintStream(data);  org.apache.xml.serialize.OutputFormat of =                      new org.apache.xml.serialize.OutputFormat("XML", "ISO-8859-1", true);  of.setIndent(1);  of.setIndenting(true);  org.apache.xml.serialize.XMLSerializer serializer =                      new org.apache.xml.serialize.XMLSerializer(ps, of);  // As a DOM Serializer  serializer.asDOMSerializer();  serializer.serialize(document);  return data.toString();}

That will give you possibility to define xml format

new XMLWriter(new FileOutputStream(fileName),              new OutputFormat(){{                        setEncoding("UTF-8");                        setIndent("    ");                        setTrimText(false);                        setNewlines(true);                        setPadText(true);              }}).write(document);