toBase64.java

 private static String toBase64(File file)
    {
        try
        {
            byte[] b = new byte[(int) file.length()];
            FileInputStream fs = new FileInputStream(file);
            fs.read(b);
            fs.close();
            return URLEncoder.encode(DatatypeConverter.printBase64Binary(b), "UTF-8");
        }
        catch (UnsupportedEncodingException e)
        {
            
        }
        catch (IOException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
    }