Home / Questions / 280945
Accepted
Marco Villegas
Asked: 2020-07-24 06:47:22 +0800 CST 2020-07-24 06:47:22 +0800 CST

check if a file was inserted in an input type file

  • 772

I'm working on a project and I need to know if the file type input has something to insert it into the DB, I was trying to validate if it was different from null, but even if I don't put any file, it enters as if it were different from null.

iPart part = request.getPart("aFoto");
        if (part != null) {
            InputStream inputStream = part.getInputStream();
            c.setFoto(inputStream);
        }
jsp

2 Answers

  1. Best Answer

    Do it from the html/jsp and put the following:

    <form>
  <input type="file" name="texto" accept="application/pdf,image/jpg" required/>
  <input type="submit" />
</form>

    The accept is to accept the extensions of a file type or several, as in this case you separate them by ,

    Oh, and the required is so the client can't leave that field empty.

    • 0

  2. For everyone with this doubt, this is the answer...

                Part part = request.getPart("aFoto");

            InputStream inputStream = part.getInputStream();

            if (inputStream.available() != 0) {
                c.setFoto(inputStream);
            }
    • 0