参考：

http://www.blogjava.net/SpartaYew/archive/2011/05/19/spingsecurity3.html

http://salever.iteye.com/blog/1686425

docs

http://docs.spring.io/spring-security/site/docs/

http://docs.spring.io/spring-security/site/docs/3.2.3.RELEASE/reference/htmlsingle/

http://docs.spring.io/spring-security/site/docs/3.2.4.RELEASE/reference/htmlsingle/

spring security