CSS not loading after site URL changes

So, basically we changed our site URL from a big one to a rather small URL. for example, http://ift.tt/2rVzPBU to www.newsite.com/12345

After these changes I see that the css is not loading anymore, is there anything that I need to add/remove to my jsp files?

I am accessing the css in my JSP files like:

resources folder is under ther web/webroot folder.

Please help.