xlsx file not able to open when its downloaded

[Kumaraguru]

Hi
I have load the xlsx file in blob using POI
when i tried to download the xlsx file from blob the xlsx file got saved but its not openening. when i tried to open the file its giving following error
The conerter failed to open the file.

Please help me Did i mistake anything in my code.

upload the file:
fileOutStream = new FileOutputStrea m(newFileName);
xlsxWorkbook.wr ite(fileOutStre am);
fileOutStream.f lush();
fileOutStream.c lose();
File newFile = new File(newFileNam e);
jobDetailTO.set Data(FileUtils. readFileToByteA rray(newFile));
new JobDetailBD().i nsertJobBlob(jo bDetailTO);

This is the query load in oracle DB
INSERT INTO USER_TOOL_SPREA DSHEET(JOB_ID,
SPREADSHEET) values (#jobIdSUID#, #data#)

Download from oracle

outFileName = "FileName.xlsx" ;
response.setHea der("Content-Disposition", "attachment ; filename= "+ outFileName);
response.setCon tentType("appli cation/vnd.openxmlform ats-officedocument. spreadsheetml.s heet; charset=UTF-8");
JobDetailTO jobTO = jobDetailBD.get JobBlob(jobDeta ilTO.getJobIdSU ID());
byte[] outFileArray = jobTO.getData() ;
ByteArrayInputS tream bis = new ByteArrayInputS tream(outFileAr ray);
out = new BufferedOutputS tream(response. getOutputStream ());
int byteRead = 0;
while ((byteRead = bis.read()) != -1) {
out.write(byteR ead);
}
out.flush();
bis.close();
out.close();
Please help me out to resolve the issue