Rédaction espaces de noms XML en Java

Question

J'ai vu quelques réponses plus anciennes autour, mais je ne trouve pas la solution pour ce cas particulier.

Je cherche la sortie suivante:

<?xml version="1.0" encoding="UTF-8"?> 
<manifest:manifest xmlns:manifest="urn:oasis:names:tc:opendocument:xmlns:manifest:1.0" manifest:version="1.2"> 
<manifest:file-entry manifest:full-path="/" manifest:version="1.2" manifest:media-type="application/vnd.oasis.opendocument.spreadsheet"/> 
</manifest:manifest> 

Alors, je l'ai essayé le code suivant:

import org.w3c.dom.Document; 
import org.w3c.dom.Element; 

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 java.io.FileOutputStream; 
import java.io.IOException; 

public class Test { 
    public static void main(String args[]){ 
     final String MIMETYPE = "application/vnd.oasis.opendocument.spreadsheet"; 
     try { 
      DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
      DocumentBuilder db = dbf.newDocumentBuilder(); 
      Document dom = db.newDocument(); 
      Element e = null; 

      Element rootEle = dom.createElementNS("manifest","manifest"); 
      rootEle.setAttributeNS("manifest","version","1.2"); 
      rootEle.setAttributeNS("xmlns","manifest","urn:oasis:names:tc:opendocument:xmlns:manifest:1.0"); 

      e = dom.createElementNS("manifest","file-entry"); 
      e.setAttributeNS("manifest","full-path","/"); 
      e.setAttributeNS("manifest","version","1.2"); 
      e.setAttributeNS("manifest","media-type",MIMETYPE); 
      rootEle.appendChild(e); 

      dom.appendChild(rootEle); 

      try { 
       Transformer tr = TransformerFactory.newInstance().newTransformer(); 
       tr.setOutputProperty(OutputKeys.INDENT, "yes"); 
       tr.setOutputProperty(OutputKeys.METHOD, "xml"); 
       tr.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); 
       tr.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4"); 

       FileOutputStream o = new FileOutputStream("Output.xml"); 
       tr.transform(new DOMSource(dom), 
         new StreamResult(o)); 

       o.close(); 
      } catch (TransformerException te) { 
       System.err.println(te.getMessage()); 
      } catch (IOException ioe) { 
       System.err.println(ioe.getMessage()); 
      } 
     } catch (ParserConfigurationException pce) { 
      System.err.println("UsersXML: Error trying to instantiate DocumentBuilder " + pce); 
     } 
    } 
} 

Je reçois la sortie suivante:

<?xml version="1.0" encoding="UTF-8" standalone="no"?> 
<manifest xmlns:ns0="xmlns" ns0:manifest="urn:oasis:names:tc:opendocument:xmlns:manifest:1.0" xmlns:ns1="manifest" ns1:version="1.2" xmlns="manifest"> 
    <file-entry xmlns:ns0="manifest" ns0:full-path="/" ns1:media-type="application/vnd.oasis.opendocument.spreadsheet" xmlns:ns2="manifest" ns2:version="1.2"/> 
</manifest> 

Il est déconner la espaces de noms! Comment puis-je obtenir la bonne sortie?

Answer 1

Le premier argument pour les méthodes set*NS(...) doivent être l'URI d'espace de nom, pas le préfixe. Dans votre cas, il est "urn: oasis: names: tc: OpenDocument: xmlns: manifeste: 1.0". Cependant, vous pouvez (et devez) spécifier le préfixe dans le paramètre name. Le code source suivant va générer la sortie que vous voulez:

import org.w3c.dom.Document; 
import org.w3c.dom.Element; 

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 java.io.FileOutputStream; 
import java.io.IOException; 

public class Test { 
    public static void main(String args[]){ 
     final String MIMETYPE = "application/vnd.oasis.opendocument.spreadsheet"; 
     try { 
      DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
      DocumentBuilder db = dbf.newDocumentBuilder(); 
      Document dom = db.newDocument(); 
      Element e = null; 

      String namespace = "urn:oasis:names:tc:opendocument:xmlns:manifest:1.0"; 

      Element rootEle = dom.createElementNS(namespace, "manifest:manifest"); 
      rootEle.setAttributeNS(namespace, "manifest:version","1.2"); 

      e = dom.createElementNS(namespace, "manifest:file-entry"); 
      e.setAttributeNS(namespace, "manifest:full-path","/"); 
      e.setAttributeNS(namespace, "manifest:version","1.2"); 
      e.setAttributeNS(namespace, "manifest:media-type",MIMETYPE); 
      rootEle.appendChild(e); 

      dom.appendChild(rootEle); 

      try { 
       Transformer tr = TransformerFactory.newInstance().newTransformer(); 
       tr.setOutputProperty(OutputKeys.INDENT, "yes"); 
       tr.setOutputProperty(OutputKeys.METHOD, "xml"); 
       tr.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); 
       tr.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4"); 

       FileOutputStream o = new FileOutputStream("Output.xml"); 
       tr.transform(new DOMSource(dom), new StreamResult(o)); 

       o.close(); 
      } catch (TransformerException te) { 
       System.err.println(te.getMessage()); 
      } catch (IOException ioe) { 
       System.err.println(ioe.getMessage()); 
      } 
     } catch (ParserConfigurationException pce) { 
      System.err.println("UsersXML: Error trying to instantiate DocumentBuilder " + pce); 
     } 
    } 
}