You can only use a JFileChooser in combination with an
applet. Because of the applet's security restrictions, it needs to be signed first.
The important question is, however,
why you need to let users select a directory. Using a JFileChooser would let the user choose a
local directory where the server has no access to (other than through the applet, but only while the applet is active). Is that what you want? Or do you want the user to select a directory on the server? In that case, perhaps you can build some HTML based file browser yourself (or find some existing code to do that). Make sure that the user cannot select just any directory; keep the selection as limited as possible.
