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
Orange Slate 
Pls answer to these Questions:ajohnpaulmca@yahoo.com
Can CeWolf take data from database,JSF,JSTL,Struts and other.
Most important thing i would like to ask is can the charts be updated
if values representing the chart changes.