How to remove <? Xml version = "1.0" encoding = "UTF-8" standalone = "no"?> From an XML document

Question

I wrote code for tests - it creates a simple XML document. My problem is that the created document contains unnecessary data in the first node. Is it possible to remove or change this node <?xml version="1.0" encoding="UTF-8" standalone="no"?> ?

 import java.io.ByteArrayOutputStream; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.OutputKeys; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import org.w3c.dom.Document; import org.w3c.dom.Element; public class MyTestClass { public static void main(String argv[]) { try { DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder docBuilder = docFactory.newDocumentBuilder(); // root elements Document doc = docBuilder.newDocument(); Element rootElement = doc.createElement("company"); doc.appendChild(rootElement); // staff elements Element staff = doc.createElement("Staff"); rootElement.appendChild(staff); // firstname elements Element firstname = doc.createElement("firstname"); firstname.appendChild(doc.createTextNode("yong")); staff.appendChild(firstname); // lastname elements Element lastname = doc.createElement("lastname"); lastname.appendChild(doc.createTextNode("mook kim")); staff.appendChild(lastname); // nickname elements Element nickname = doc.createElement("nickname"); nickname.appendChild(doc.createTextNode("mkyong")); staff.appendChild(nickname); // salary elements Element salary = doc.createElement("salary"); salary.appendChild(doc.createTextNode("100000")); staff.appendChild(salary); Transformer t = TransformerFactory.newInstance().newTransformer(); ByteArrayOutputStream s = new ByteArrayOutputStream(); t.setOutputProperty(OutputKeys.INDENT, "yes"); t.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2"); t.transform(new DOMSource(doc),new StreamResult(s)); System.out.println(new String(s.toByteArray())); } catch (ParserConfigurationException pce) { pce.printStackTrace(); } catch (TransformerException tfe) { tfe.printStackTrace(); } } } 

It returns:

  <?xml version="1.0" encoding="UTF-8" standalone="no"?> <company> <Staff> <firstname>yong</firstname> <lastname>mook kim</lastname> <nickname>mkyong</nickname> <salary>100000</salary> </Staff> </company> 

Is it possible to remove or change this node <?xml version="1.0" encoding="UTF-8" standalone="no"?> ?

Answer 1

You can add the following to your Transformer

 t.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); 

see here for details