j2ee use to develop server program which will deply into web server in java world.
It is a set of protocol(Interface) like jsp protocal,serlvet protocal,javabean protocol.
web server offer the implement of j2ee protocal it call j2ee webserver.
we can develop program consist of jsp,serlvet,javabean component base on j2ee protocal and implement(webserver)
J2EE series - explore j2ee Infrastructure
原文：http://www.cnblogs.com/lzcrack/p/3529434.html