Java XML Output - proper indenting for child items

Question

I\'d like to serialize some simple data model into xml, I\'ve been using the standard java.org.w3c -related code (see below), the indentation is better than no \"OutputKeys.INDE

Answer 1

import com.sun.org.apache.xml.internal.serializer.OutputPropertiesFactory

transformer.setOutputProperty(OutputPropertiesFactory.S_KEY_INDENT_AMOUNT, "4");

Answer 2

Document doc;

.....

TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = factory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
transformer.transform(new DOMSource(doc), new StreamResult(new File("filename.xml")));
transformer.transform(new DOMSource(doc), new StreamResult(System.out));

Answer 3

If the Transformer implementation you're using is Xalan-J, then you should be able to use:

transformer.setOutputProperty(
   "{http://xml.apache.org/xslt}indent-amount", "5");

See also: http://xml.apache.org/xalan-j/usagepatterns.html