TrAX + StreamSource / XmlReader

Bonjour,

Quelle est l'utilité de passer par un Reader entre le 1er bout de code et le 2ème ?

Code:

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import java.io.File;
 
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
 
public class ProgramExampleTrAX {
    public static void main(String[] args) throws TransformerException {
 
        File xmlFile = new File(args[0]);
        File xslFile = new File(args[1]);
 
        Source xmlSource = new StreamSource(xmlFile);
        Source xslSource = new StreamSource(xslFile);
        Result result = new StreamResult(System.out);
 
        TransformerFactory transFact = TransformerFactory.newInstance();
 
        Transformer trans = transFact.newTransformer(xslSource);
 
        trans.transform(xmlSource, result);
    }
}

Code:

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import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
 
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
 
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLReaderFactory;
 
public class ProgramExampleTrAX {
    public static void main(String[] args) throws TransformerException {
 
        File xmlFile = new File(args[0]);
        File xslFile = new File(args[1]);
 
        XMLReader xmlReader = null;
        try {
            xmlReader = XMLReaderFactory.createXMLReader();
 
            Source xmlSource = new StreamSource(new FileReader(xmlFile));
            Source xslSource = new StreamSource(new FileReader(xslFile));
            Result result = new StreamResult(System.out);
 
            TransformerFactory transFact = TransformerFactory.newInstance();
 
            Transformer trans = transFact.newTransformer(xslSource);
 
            trans.transform(xmlSource, result);
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }
 
}

Merci.