Reporting framework for the application

i have an application for which i want use some reporting fram开发者_开发技巧ework to generate some reports. i have no idea about this. so i wanted to know some good reporting framework available. with easy to understand. facility to generate pdf's and java friendly.

Check Jasper Reports. "JasperReports is the world's most widely used open source reporting engine."

iText is a great framework for creating PDFs

i-net Crystal-Clear is a great framework with a great support. "i-net Crystal-Clear is the world's most widely used commercial reporting engine for Java."