I have an issue about my Application in detail. - I have a java servlet receive data from mms gateway (MM7 protocol) I get inputstream (image content , message content ) convert to string ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); //String orgin = new String(byteArrayOutputStream.toByteArray(),"UTF-8"); String orgin = Streams.asString(request.getInputStream(), "ISO-8859-1"); Then I substring orgin for image content and convert to base64 and save to image file but string that I convert to base64 can not save to image because this error not a jpeg file I print out string base64 does not start with /9j that mean not jpg format please suggest or give an example for me Best reqard lieang noob noob sorry for my english :)