GridFSDBFile gfsFileOut = (GridFSDBFile) gridfs.findOne(rawName);
System.out.println(gfsFileOut.getInputStream());
InputStream is = gfsFileOut.getInputStream();
// Reading the excel file
List<String> list = null;
BufferedReader br = null;
try {
String sCurrentLine;
br = new BufferedReader(new InputStreamReader(is, "UTF-8"));