Servlet not accepting Form fields

Question

Hi,
In my serlvet how to accept the "setAttribute" values or passing values thru hidden form fileds using form as POST method and ecntyp as "multipart/form-data"
String f = (String) req.getAttribute("dir");
and
String f = req.getParamater("dir");
I tried both ways but Still null values.
I have form with this code:
<form name="form" action="upload" method="post" enctype="multipart/form-data" onsubmit="return validate();">
<!-- <input type="hidden" name="dir" value="abc"> didnt worked-->
<% request.setAttribute("dir", "abc");%> //neither this worked
=====My Servlet ====
public void doPost(HttpServletRequest req,HttpServletResponse res) throws IOException, ServletException {
String f = (String) req.getAttribute("dir");
System.out.println(f);
========================

Answer 1

Multipart encoding submits both the HTML form values as well as additional content. Normally, this is used for a web page that allows file uploads, but there are other uses as well. The HTTP message body is chunked into parts (hence multi-part). There is a HTTP header that indicates what the chunking token is. You can parse it yourself, or download FileUpload from Jakarta Commons.
To actually change the form, you need to perform the following steps:
In the <form> tag, set the enctype attribute to multipart/form-data.
For each file upload, create an <input> tag of type file.- Saish