Some commonly used non-standard libraries here are summarized here to avoid repeated development. I will update it in time, I also hope that everyone will reply to the non-standard library you know, share this resource (preferably open source package) com.orelly.servlets.com/cos/index.html JSP / servlet Upload file to server org.jfreechart (http://www.jfree.org/jfreechart/index.html) chart production
