spring security3.0参考网站
http://justjavac.iteye.com/blog/694366
http://wiki.mbalib.com/wiki/%E4%BC%81%E4%B8%9A%E5%86%85%E5%AE%B9%E7%AE%A1%E7%90%86
http://static.springsource.org/spring-security/site/tutorial.html
https://www.ibm.com/developerworks/cn/java/j-acegi1/
http://www.docin.com/p-82533221.html3
http://wenku.baidu.com/view/b0c0dc0b79563c1ec5da7179.html