Cewolf is a “tag library for charts of all kinds. It enables every JSP to easily embed chart images. It can be used by any web applications running in a servlet container.” It is very simple to use and very powerful in any kind of web application. Integrating Cewolf with Spring won’t take a lot of time as well.
To start working with Cewolf you should read a quite short tutorial on project’s site http://cewolf.sourceforge.net .It describes the basics: how to configure web.xml file, what libraries must be included into project.
Reference : here