Java EE各种documentation

总之通用的法则，google："XxxName documentation"

例如，如果要查看JSTL的reference manual，google：jstl doc即可，oracle官网有
http://docs.oracle.com/javaee/5/jstl/1.1/docs/tlddocs/

又比如，Expression Language, google: el documentation，俩URL

http://docs.oracle.com/javaee/6/tutorial/doc/gjddd.html

http://docs.oracle.com/javaee/1.4/tutorial/doc/JSPIntro7.html