Why use spring with liferay

[sos di, módosítva 11 év-val korábban]

Hi, can anybody tell me what are the advantages of using spring mvc with liferay? I have to decide whther i should go for sping or simple Liferay MVC.
Thanks

[Hitoshi Ozawa, módosítva 11 év-val korábban]

Check out the following page:

http://javainfoseek.blogspot.jp/2010/08/spring-mvc-portlet-on-liferay.html

[sos di, módosítva 11 év-val korábban]

Thanks Hitoshi for your reply, but this links seems to be more like advantage of portlet framework in spring. I want the comparision between portlet with and without spring.