import java.io.File;
import java.io.StringWriter;
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 Test {


	public static void main(String[] args) throws TransformerException {
		long start = System.currentTimeMillis();
		//System.setProperty("javax.xml.transform.TransformerFactory", "org.apache.xalan.processor.TransformerFactoryImpl");
		
		Source xmlSource = new StreamSource(new File("test.xml"));
        Source xslSource = new StreamSource(new File("test.xsl"));
        
        TransformerFactory tFactory = TransformerFactory.newInstance();
        Transformer transformer = tFactory.newTransformer(xslSource);
        
        String str = null;
        StringWriter writer = new StringWriter();
        transformer.transform(xmlSource, new StreamResult("new.html"));
        //transformer.transform(xmlSource, new StreamResult(writer));
        //System.out.println(writer.toString().trim());
        long stop = System.currentTimeMillis();
        System.out.println((stop - start) / 1000.0+" ms.");
			
	}
}

<elem>
  <field1>text1</field1>
</elem>
<elem>
  <field1>text2</field1>
</elem>

elem#0.field1#0=text1
elem#1.field1#0=text2

elem#0.field1#0=text1
elem#1.field1#0=text2