public class HowToXSLT {
    
public static void main(String[] args) {
 
  try {
  
        byte[] source = ..мой xml;
        byte[] st = мой style;
         byte out[] ;
       
     
        InputStream xml = new BufferedInputStream(new ByteArrayInputStream(source)); 
      
        InputStream style = new BufferedInputStream(new ByteArrayInputStream(st)); 
 
        OutputStream bos  =  new BufferedOutputStream(new ByteArrayOutputStream());
          
     
 
    TransformerFactory tFactory = TransformerFactory.newInstance();
 
    Transformer transformer =
      tFactory.newTransformer
         (new javax.xml.transform.stream.StreamSource
                    (xml));
      
    transformer.transform
      (new javax.xml.transform.stream.StreamSource
             (style),
       new javax.xml.transform.stream.StreamResult
 
      (bos));
      
 
      bos.write(out); 
      
    }
  
  catch (Exception e) {
    e.printStackTrace( );
    }
  
  }
}