What : .jspf files are generally files that are included in .jsp files via the include directive. The 'f' stands for 'fragment' as these files are not full JSPs in and of themselves.
How to Compile: Since .jspf is a fragment of a jsp hence it may not be complete and compilable source, so most of the time it can't be compiled independently of another, complete, source that references them.
Source : Ibm Infocentre
