LG

Ressource : atelier.xml

XMLDOM.java

package org.llgc;
 
import java.io.File;
import java.io.IOException;
 
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;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
 
public class XMLDOM
{
  public static void readXML ()
  {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance ();
    try
    {
      DocumentBuilder parser = factory.newDocumentBuilder ();
      File XFile = new File ("atelier.xml");
      Document root = parser.parse (XFile);
      NodeList childs = root.getElementsByTagName ("customers").item (0).getChildNodes ();
      for (int i = 0; i < childs.getLength (); i++)
      {
        Node node = childs.item (i);
        if ( (node.getNodeType () == org.w3c.dom.Node.ELEMENT_NODE) && (node.getNodeName ().equals ("customer")))
        {
          Element el = (Element) node;
          System.out.println (el.getAttribute ("id") + " " + el.getTextContent ());
        }
      }
    }
    catch (SAXException | IOException | ParserConfigurationException e)
    {
      e.printStackTrace ();
      return;
    }
 
  }
 
  public static void writeXML ()
  {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance ();
    try
    {
      DocumentBuilder parser = factory.newDocumentBuilder ();
      Document document = parser.newDocument ();
      Element root = document.createElement ("contacts");
      document.appendChild (root);
      String[][] contacts = { { "Dupont", "Pierre", "192.168.1.100" }, { "Dupond", "Paul", "192.168.1.101" },
          { "Ducont", "Jack", "192.168.1.102" }, { "Ducond", "Peter", "192.168.1.103" },
          { "Dutont", "Arf", "192.168.1.104" } };
      int i = 0;
      for (String[] contact : contacts)
      {
        ++i;
        Element contactXML = document.createElement ("contact");
        contactXML.setAttribute ("id", Integer.toString (i));
        Element contactNom = document.createElement ("nom");
        contactNom.setTextContent (contact[0]);
        contactXML.appendChild (contactNom);
        Element contactPrenom = document.createElement ("prenom");
        contactPrenom.setTextContent (contact[1]);
        contactXML.appendChild (contactPrenom);
        Element contactIP = document.createElement ("ip");
        contactIP.setTextContent (contact[2]);
        contactXML.appendChild (contactIP);
        root.appendChild (contactXML);
      }
 
      TransformerFactory transformerFactory = TransformerFactory.newInstance ();
      Transformer transformer = transformerFactory.newTransformer ();
      DOMSource source = new DOMSource (document);
      StreamResult sortie = new StreamResult (new File ("contact.xml"));
 
      transformer.setOutputProperty (OutputKeys.VERSION, "1.0");
      transformer.setOutputProperty (OutputKeys.ENCODING, "UTF-8");
      document.setXmlStandalone (false);
      // Ne marche pas : transformer.setOutputProperty (OutputKeys.STANDALONE,
      // "yes");
 
      transformer.setOutputProperty (OutputKeys.INDENT, "yes");
      transformer.setOutputProperty ("{http://xml.apache.org/xslt}indent-amount", "2");
 
      transformer.transform (source, sortie);
    }
    catch (ParserConfigurationException | TransformerException e)
    {
      e.printStackTrace ();
      return;
    }
  }
 
  public static void main (String[] args)
  {
    readXML ();
    writeXML ();
  }
}

Ressource : contact.xml

sax.java

package org.llgc;
 
import java.io.File;
import java.io.IOException;
 
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
 
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;
 
public class XMLSAX extends DefaultHandler
{
  private boolean close = false;
  private int deep = 0;
  private Deep0 pos0 = Deep0.UNKNOWN;
  private Deep1 pos1 = Deep1.UNKNOWN;
  private Deep2 pos2 = Deep2.UNKNOWN;
 
  public enum Deep0
  {
    UNKNOWN, CONTACTS
  };
 
  public enum Deep1
  {
    UNKNOWN, CONTACT
  };
 
  public enum Deep2
  {
    UNKNOWN, NOM, PRENOM, IP
  };
 
  @Override
  public void startDocument () throws SAXException
  {
    System.out.println ("Liste des documents");
    close = false;
    deep = 0;
  }
 
  @Override
  public void startElement (String uri, String localName, String qName, Attributes attributes) throws SAXException
  {
    close = false;
    switch (deep)
    {
      case 0:
      {
        if (qName.equals ("contacts"))
        {
          pos0 = Deep0.CONTACTS;
        }
        else
        {
          fatalError (new SAXParseException ("Fichier invalide. Élément racine incorrect : " + qName + ".", null));
        }
        break;
      }
      case 1:
      {
        if (qName.equals ("contact"))
        {
          pos1 = Deep1.CONTACT;
        }
        else
        {
          fatalError (new SAXParseException ("Fichier invalide. Élément niveau 1 incorrect : " + qName + ".", null));
        }
        break;
      }
      case 2:
      {
        if (qName.equals ("nom"))
        {
          pos2 = Deep2.NOM;
        }
        else if (qName.equals ("prenom"))
        {
          pos2 = Deep2.PRENOM;
        }
        else if (qName.equals ("ip"))
        {
          pos2 = Deep2.IP;
        }
        else
        {
          fatalError (new SAXParseException ("Fichier invalide. Élément niveau 2 incorrect : " + qName + ".", null));
        }
        break;
      }
      default:
      {
        fatalError (new SAXParseException ("Fichier invalide. Niveau d'arborescence (3) trop grand.", null));
        break;
      }
    }
    if ( (pos0 == Deep0.CONTACTS) && (pos1 == Deep1.CONTACT) && (pos2 == Deep2.UNKNOWN))
    {
      System.out.println (qName + " - " + attributes.getValue ("id") + " : ");
    }
    deep++;
  }
 
  @Override
  public void characters (char[] ch, int start, int length) throws SAXException
  {
    if (close)
    {
      return;
    }
 
    if ( (ch[start] != '\n') && (pos0 == Deep0.CONTACTS) && (pos1 == Deep1.CONTACT))
    {
      switch (pos2)
      {
        case NOM:
          System.out.print ("Nom : ");
          break;
        case PRENOM:
          System.out.print ("Prénom : ");
          break;
        case IP:
          System.out.print ("IP : ");
          break;
        default:
          fatalError (new SAXParseException ("Fichier invalide. Type inconnu.", null)); // Erreur
                                                                                        // impossible
                                                                                        // normalement.
          break;
      }
      System.out.println (new String (ch, start, length));
    }
  }
 
  @Override
  public void endElement (String uri, String localName, String qName) throws SAXException
  {
    deep--;
    switch (deep)
    {
      case 0:
        pos0 = Deep0.UNKNOWN;
        break;
      case 1:
        pos1 = Deep1.UNKNOWN;
        break;
      case 2:
        pos2 = Deep2.UNKNOWN;
        break;
      default:
        // Erreur impossible normalement.
        fatalError (new SAXParseException ("Fichier invalide. Type inconnu.", null));
        break;
    }
    close = true;
  }
 
  @Override
  public void endDocument () throws SAXException
  {
    close = true;
  }
 
  @Override
  public void fatalError (SAXParseException e) throws SAXException
  {
    throw new SAXException (e);
  }
 
  public static void main (String[] args)
  {
    SAXParserFactory factory = SAXParserFactory.newInstance ();
    try
    {
      SAXParser parser = factory.newSAXParser ();
      parser.parse (new File ("contact.xml"), new XMLSAX ());
    }
    catch (ParserConfigurationException | SAXException | IOException e)
    {
      e.printStackTrace ();
      return;
    }
  }
}