Problem with french character display in Excel file

Question

In my program I am exporting the french content into one excel file (.csv)through the following code but the characters in french are not getting displayed properly. Please let me know what is the issue
I have checked the contents that is being written in "fileName"
It is French only. But when the file is downloaded to desktop, it is showing junk characters in .csv file
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if (fileName != null) {
File theFile = new File(fileName);
if (theFile != null) {
try {
     byte[] bytesFromFile = exportUtil.getBytesFromFile(theFile);
     response.setContentType("text/csv; charset=UTF-8");
     response.setHeader("Content-Disposition",
          "inline;filename=" + theFile.getName());
     response.setContentLength((int) theFile.length());
     ServletOutputStream sos = response.getOutputStream();
     sos.write(bytesFromFile);
     sos.flush();
     sos.close();
} catch (IOException e2) {
     e2.printStackTrace();
}

Answer 1

Have you confirmed that the file you are copying to the response is actually encoded in UTF-8? Because you're telling the server that it is. If it's in some other charset then naturally it isn't going to look right.