Is there a way to execute a JSP from the comandline or from my own application?
There is a little tool called JSPExecutor that allows you to do just that.
The developers (
Hendrik Schreiber <firstname.lastname@example.org> &
Peter Rossbach <email@example.com>) aim was not to write a full blown servlet engine, but to provide means to use JSP for generating source code or reports.
Therefore most HTTP-specific features (headers, sessions, etc) are not implemented, i.e. no reponseline or header is generated.
Nevertheless you can use it to precompile JSP for your website.