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javahtmljakarta-eefile-uploadenctype

Why am I getting null when I request the FileName?

The following HTML snippet makes a POST request to a servlet SendFileName. 

<form method="post" action="SendTheFileName" enctype="multipart/form-data">
                <div id="Files_to_be_shared"> 
                      <input type="file" id="File" name="FileTag" />
                      <input type="submit" value="Share" /> 
                </div>
</form>

In the servlet's POST method I try to get the file name by calling :

String FileName = request.getParameter("FileTag")

but I am getting null. Why is that ?

I am using Apache commons for file upload. It is working fine. I don't know why do I get null when the enctype is multipart/form-data while using only the jdk.

Solution

  • Servlet 3.0 API (Java EE 6) provides methods to access the content of a multipart post:

    See HttpServletRequest.getParts() You should have one Part for the file and one for each parameter.