Question

I need to convert XML built with dom4j to a w3c document and don’t have any idea about how do it.

Answer 1

I’m assuming you want to go from:

org.dom4j.Document

To:

org.w3c.dom.Document

From the dom4j quick start guide:

Document document = ...;
String text = document.asXML();

From a JavaRanch example on String to Document:

public static Document stringToDom(String xmlSource) 
        throws SAXException, ParserConfigurationException, IOException {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    return builder.parse(new InputSource(new StringReader(xmlSource)));
}

Combine the 2 and you should have what you need.