java - How to remove standalone attribute declaration in xml document?

Question

Im am currently creating an xml using Java and then I transform it into a String. The xml declaration is as follows:

DocumentBuilderFactory dbfac = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = dbfac.newDocumentBuilder();
Document doc = docBuilder.newDocument();
doc.setXmlVersion("1.0");

For transforming the document into String, I include the following declaration:

TransformerFactory transfac = TransformerFactory.newInstance();
Transformer trans = transfac.newTransformer();
trans.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
trans.setOutputProperty(OutputKeys.VERSION, "1.0");
trans.setOutputProperty(OutputKeys.ENCODING,"UTF-8");
trans.setOutputProperty(OutputKeys.INDENT, "yes");

And then I do the transformation:

StringWriter sw = new StringWriter();
StreamResult result = new StreamResult(sw);
DOMSource source = new DOMSource(doc);
trans.transform(source, result);
String xmlString = sw.toString();

The problem is that in the XML Declaration attributes, the standalone attribute is included and I don't want that, but I want the version and encoding attributes to appear:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

Is there any property where that could be specified?

question from:https://stackoverflow.com/questions/8438105/how-to-remove-standalone-attribute-declaration-in-xml-document

Answer 1

From what I've read you can do this by calling the below method on Document before creating the DOMSource:

doc.setXmlStandalone(true); //before creating the DOMSource

If you set it false you cannot control it to appear or not. So setXmlStandalone(true) on Document. In transformer if you want an output use OutputKeys with whatever "yes" or "no" you need. If you setXmlStandalone(false) on Document your output will be always standalone="no" no matter what you set (if you set) in Transformer.

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