Why data not retrieved using request.getParameter() when using post method in html

Question

In my jsp code I use the request.getParameter() to retrieve the data which is entered in html. The data was retrieved when using get method but it is not when im using post method Why this happend

My html form is

<code>
<form  name="inp" action="upload.jsp"  method="post" onsubmit="return valid();" enctype="multipart/form-data">
<table align="center" cellspacing="2">

<tr><td></td></tr>
<tr><td></td></tr>
<tr><td></td></tr>
<tr><td><font size="5" color="#E41B17">Select File</font> </td>
<td><input type="file" name="infile"></td>
</tr>
<tr><td><font size="5" color="#E41B17">Target File Name</font></td>
<td><input type="text" size="20" name="filename"></input></td>
</tr>
<tr></tr>
<tr><td colspan="2" align="center"><input type=submit value="Upload"  ></td></tr>
</table>
<br></br>
<center>
<a href="index.html"><font color="#E41B17">HOME</font></a>
</center>
</form>
</code>

And my jsp scriptlet is

<% String f = request.getParameter("filename");
  System.out.println(f); %>

Thanks in Advance

You need to put the html form code in a "code" tag or it won't display. — Jacob Mattison
– Jacob Mattison, Commented Sep 18, 2009 at 13:57
I've edited your post so that the form and scriptlet are marked as code. You can do this in the future by selecting the text, and clicking the "0101" button on top of the editing box. — kdgregory
– kdgregory, Commented Sep 18, 2009 at 14:00

kdgregory · Accepted Answer · 2009-09-18 14:03:33Z

5

Now to the issues: you've set the form's content type to be multipart, which means that you have to explicitly parse the request body; the container will only parse if you leave the default form-encoded. This article seems to give an example of how to access multipart data on the server side.

Aside from that, you do realize that your form is commented-out, so should never be handled by your browser, right? If you're actually seeing something on the browser, it probably isn't coming from this location.

answered Sep 18, 2009 at 14:03

community wiki

kdgregory

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1 Comment

shrub34 Over a year ago

I would add that if you don't need to "manually" parse the POST stream, then removing the encoding will resolve the immediate problem.

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