Re: request.getParameter always null

From:

Lew <lew@nowhere.com>

Newsgroups:

comp.lang.java.programmer

Date:

Fri, 19 Jan 2007 16:49:41 -0500

Message-ID:

<Co6dnYiiCcxroSzYnZ2dnUVZ_tijnZ2d@comcast.com>

Why in the world did you set follow-up to alt.fan.heinlein?

pixelmeow wrote:

I'm using the Apache Commons FileUpload package to upload a file,
along with some other information such as username. I'm using JSP to
send the file and info to a servlet. The problem is that the
request's parameters are always null.

--The example code from Apache:
DiskFileItemFactory factory = new DiskFileItemFactory(size, tempPath);
ServletFileUpload upload = new ServletFileUpload(factory);
ServletFileUpload sfu = new ServletFileUpload();
isMultipart = sfu.isMultipartContent(ctx);
--last line ^^ throws nullpointerexception

You didn't use the factory to create sfu.

The line didn't throw a "nullpointerexception", it threw a
"NullPointerException", am I right?

Which variable was null?

I've been trying to find the answer for this all week, and I can't
find it. I've got some other code that worked for this, but it
depended on finding the indexOf() certain characters to get username
and state, and the file. I don't really want to do that. It was also
in a JSP rather than a servlet.

Almost bald from pulling my hair out, I'd love some help, and thank
you in advance for your consideration.

If your form posted using enctype="multipart/form-data" then you need to use
org.apache.commons.fileupload.FileItem to retrieve parameters:

  List items = upload.parseRequest( request );
  FileItem item = getItemOfInterest( items, name );
   // use your favorite algorithm to get the item from the List
  String value = (item == null? null : item.getString());

- Lew