Attribute with Namespace

      

import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamWriter;

public class MainClass {
  public static void main(String[] args) throws Exception {
    XMLOutputFactory outputFactory = XMLOutputFactory.newInstance();
    XMLStreamWriter writer = outputFactory.createXMLStreamWriter(System.out);
    writer.writeStartElement("ns1", "sample", "http://www.e.com/ns1");
    writer.writeNamespace("ns1", "http://www.e.com/ns1");

    writer.writeAttribute("http://www.e.com/ns2", "attribute", "true");
    writer.writeEmptyElement("http://www.e.com/ns1", "inner");
    writer.writeEmptyElement("ns2", "inner", "http://www.e.com/ns2");
    writer.writeEndElement();
    writer.writeEndDocument();
    writer.flush();
  }
}