How to Call IReport Jasper files from JSP with oracle using Jdev

Hi,

i wonder any expert here could kindly provide tutorial or example for me to refer on how to
integrate jasper files pdf for jsp that build using jdeveloper and connect to oracle database
to get data for generating pdf report.

Im new with ireport and jasper files. I found this for tutorial :

http://www.zx2010.com/question/how-call-jasper-report-jsp.asp

-but it does not provide complete guide.

the example i want is something like this:
http://www.daniweb.com/web-development/jsp/threads/308549

-but his code got error.

2nd example i want is something like this:
https://forums.oracle.com/forums/thread.jspa?threadID=1522457

- but i need to call .jasper files instead of .jrxml


My Current code is like this:

http://pastebin.com/Fh921fCi

Select allOpen in new window

Output like:


Any expert here kindly please help me.

Thanks