TRAITEMENT D'UN FICHIER XML

import java.io.*;

import org.xml.sax.*;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParser;  

public class Echoing extends HandlerBase {
    // Pour gérer l'indentation du document final.
    private String indentString = "        ";
    private int indentLevel = 0;

    // Démarrage de votre programme
    public static void main (String argv []) {
        if (argv.length != 1) {
            System.err.println ("Usage: cmd filename");
            System.exit(-1);
        }

        SAXParserFactory factory = SAXParserFactory.newInstance();
        try {
            SAXParser saxParser = factory.newSAXParser();
            saxParser.parse( new File(argv [0]), new Echoing() );
        } catch (Throwable t) {
            t.printStackTrace ();
        }

        System.exit(0);
    }

    /////////////////////////////////////////////////////////////
    // Les gestionnaires d'évènements SAX ///////////////////////
    /////////////////////////////////////////////////////////////

    public void startDocument () throws SAXException {
        System.out.println("START DOCUMENT");
        System.out.println("<?xml version='1.0' encoding='UTF-8'?>");
    }

    public void endDocument () throws SAXException {
        System.out.println("END DOCUMENT");
        if (indentLevel > 0) System.out.println("AIEEEE");
    }

    public void startElement (String name, AttributeList attrs)
                                                    throws SAXException  {
        tabs();
        System.out.print("<"+name);
        if (attrs != null) {
            for (int i = 0; i < attrs.getLength (); i++) {
                        System.out.println();
                        tabs();
                System.out.print("    ");
                System.out.print(attrs.getName (i));
                System.out.print(" = \"");
                System.out.print(attrs.getValue (i));
                System.out.print("\"");
            }
        }

        if (attrs.getLength() > 0) { System.out.println(""); tabs(); }
        System.out.println(">");
        indentLevel++;
    }

    public void endElement (String name) throws SAXException {
        indentLevel--;
        tabs();
        System.out.println("</"+name+">");
    }

    public void characters (char buf [], int offset, int len)
                                                      throws SAXException {
        String s = new String(buf, offset, len);
        if (!s.trim().equals("")) {
            tabs();
            System.out.println(s);
        }
    }

    /////////////////////////////////////////////////////////////
    // Fonctions utilitaires ////////////////////////////////////
    /////////////////////////////////////////////////////////////

    private void tabs() {
        for(int i=0;i<indentLevel;i++) {
            System.out.print(indentString);
        }
    }
}