I have a class that defines the names of various session attributes, e.g.
I would like to use these constants within a JSP to test for the presence of these attributes, something like:
But I can't seem to get the sytax correct. Also, to avoid repeating the rather lengthy tests above in multiple places, I'd like to assign the result to a local (page-scoped) variable, and refer to that instead. I believe I can do this with <c:set>, but again I'm struggling to find the correct syntax.