下载环境及其源代码 API  以及例子

Servlet JSP  EL http://tomcat.apache.org/ 

JSTL http://archive.apache.org/dist/jakarta/taglibs/standard/binaries/

http://archive.apache.org/dist/jakarta/taglibs/standard/source/源码

框架

Struts2    http://struts.apache.org/download.cgi

HiBERNATE http://hibernate.org/orm/downloads/  jar包在这可以下载  源码托管在GITHUB上

Spring http://www.open-open.com/news/view/1eb1613 下载指导。

框架学习之道

http://struts2.group.iteye.com/group/wiki/1306-struts2-way-of-learning

J2EE官方资料