[FileUpload] Does ServletFileUpload have to be an instance variable?

[Jamie Bisotti]

I've looked at the examples, and it looks like they are all creating the
following instance variables inside the Servlet's doPost(...):


...
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload( new DiskFileItemFactory() );
...


Do they have to be created on each request (i.e. be instance variables)?
Or, could I have 'private static final' members that get reused?

Thank in advance.

--
Jamie Bisotti