how to create a report ready to print

i'm just evaluating JasperReports.
http://jasperforge.org/sf/projects/jasperreports

here's a short description how to use JasperReports wit RoR
http://wiki.rubyonrails.com/rails/pages/HowtoIntegrateJasperReports

it took me a long time to understand whats going on there. but new to
RoR and not really familiar with java isnt the best point to start.

if there is time left i'll try to put together a complete working
example.

some other mentioned to take a look on ruport.
http://ruport.infogami.com/