gistfile1.txt

 private static String toBase64(BufferedImage image, String format)
    {
        ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
        try
        {
            
            ImageIO.write(image, format, byteArray);            
            return URLEncoder.encode(DatatypeConverter.printBase64Binary(byteArray.toByteArray()), "UTF-8");
        }
        catch (UnsupportedEncodingException e)
        {
            
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }