Usando um servlet em uma aplicação JSF (Resolvido)

private static void processStream(InputStream is, ServletRequest request, 
       HttpServletResponse response) throws ServletException, IOException { 
  
     BufferedImage image; 
     try { 
       image = ImageIO.read(is); 
     } catch (IOException ioe) { 
       log.fine(ioe.toString()); 
       // Includes javax.imageio.IIOException 
       response.sendRedirect("badimage.jspx"); 
       return; 
     } catch (CMMException cmme) { 
       log.fine(cmme.toString()); 
       // Have seen this in logs 
       response.sendRedirect("badimage.jspx"); 
       return; 
     } catch (IllegalArgumentException iae) { 
       log.fine(iae.toString()); 
       // Have seen this in logs for some JPEGs 
       response.sendRedirect("badimage.jspx"); 
       return; 
     } 
     if (image == null) { 
       response.sendRedirect("badimage.jspx"); 
       return;       
     } 
     if (image.getHeight() <= 1 || image.getWidth() <= 1 || 
         image.getHeight() * image.getWidth() > MAX_PIXELS) { 
       log.fine("Dimensions too large: " + image.getWidth() + 'x' + image.getHeight());         
       response.sendRedirect("badimage.jspx"); 
       return; 
     } 
  
     Reader reader = new MultiFormatReader(); 
     LuminanceSource source = new BufferedImageLuminanceSource(image); 
     BinaryBitmap bitmap = new BinaryBitmap(new GlobalHistogramBinarizer(source)); 
     Collection<Result> results = new ArrayList<Result>(1); 
     ReaderException savedException = null; 
  
     try { 
       // Look for multiple barcodes 
       MultipleBarcodeReader multiReader = new GenericMultipleBarcodeReader(reader); 
       Result[] theResults = multiReader.decodeMultiple(bitmap, HINTS); 
       if (theResults != null) { 
         results.addAll(Arrays.asList(theResults)); 
       } 
     } catch (ReaderException re) { 
       savedException = re; 
     } 
  
     if (results.isEmpty()) { 
       try { 
         // Look for pure barcode 
         Result theResult = reader.decode(bitmap, HINTS_PURE); 
         if (theResult != null) { 
           results.add(theResult); 
         } 
       } catch (ReaderException re) { 
         savedException = re; 
       } 
     } 
  
     if (results.isEmpty()) { 
       try { 
         // Look for normal barcode in photo 
         Result theResult = reader.decode(bitmap, HINTS); 
         if (theResult != null) { 
           results.add(theResult); 
         } 
       } catch (ReaderException re) { 
         savedException = re; 
       } 
     } 
  
     if (results.isEmpty()) { 
       try { 
         // Try again with other binarizer 
         BinaryBitmap hybridBitmap = new BinaryBitmap(new HybridBinarizer(source)); 
         Result theResult = reader.decode(hybridBitmap, HINTS); 
         if (theResult != null) { 
           results.add(theResult); 
         } 
       } catch (ReaderException re) { 
         savedException = re; 
       } 
     } 
  
     if (results.isEmpty()) { 
       handleException(savedException, response); 
       return; 
     } 
  
     if (request.getParameter("full") == null) { 
       response.setContentType("text/plain"); 
       response.setCharacterEncoding("UTF8"); 
       Writer out = new OutputStreamWriter(response.getOutputStream(), "UTF8"); 
       try { 
         for (Result result : results) { 
           out.write(result.getText()); 
           out.write('\n'); 
         } 
       } finally { 
         out.close(); 
       } 
     } else { 
       request.setAttribute("results", results); 
       request.getRequestDispatcher("decoderesult.jspx").forward(request, response); 
     } 
   }

if (request.getParameter("full") == null) { 
       response.setContentType("text/plain"); 
       response.setCharacterEncoding("UTF8"); 
       Writer out = new OutputStreamWriter(response.getOutputStream(), "UTF8"); 
       try { 
         for (Result result : results) { 
           out.write(result.getText()); 
           out.write('\n'); 
         } 
       } finally { 
         out.close(); 
       }