Checking type of a file (csv or excel file(xlsx)) in java

Question

I need to upload a file. Before I upload it, I need to know if the file is either csv or excel file(xlsx). If it is csv or excel file I will continue else exit. How can I know the type of a file in java by using its path.

This link gives you so many answers choose the best. http://stackoverflow.com/questions/3571223/how-do-i-get-the-file-extension-of-a-file-in-java — Murali krishna, Dec 24 '15 at 05:46

score 2 · Answer 1 · answered Dec 24 '15 at 05:49

2

You can use probeContentType(Path path) for this.

Probes the content type of a file.

If the content-type is text/csv it is a .csv file. If the content-type is application/vnd.openxmlformats-officedocument.spreadsheetml.sheet it is a .xlsx file.

You should try something like:

File file = new File("some path");
Path filePath = file.toPath();
String contentType = probeContentType(filePath);
if("text/csv".equals(contentType)) { 
  ...
}

answered Dec 24 '15 at 05:49

thegauravmahawar

2,802
3
14
23

this method is very buggy and java flavour dependent on what it recognises – bharal Jan 27 '20 at 16:43

banarsiamin · Answer 2 · 2023-06-13T06:20:34.817

-1

  <?php
  $mimes = array('application/vnd.ms-excel','text/plain','text/csv','text/tsv');
    if(in_array($_FILES['file']['type'],$mimes)){
      // do something
    } else {
      die("Sorry, mime type not allowed");
    }

?>

edited Jun 13 '23 at 06:20

answered Sep 11 '17 at 10:00

banarsiamin

1
6

Checking type of a file (csv or excel file(xlsx)) in java

2 Answers2