P.S. - If you are an experienced Java/JEE Program and want to learn Spring Security end-to-end, I recommend Learn Spring Security course by Eugen Paraschiv, The definitive guide to secure your Java application. It's useful for both junior and experienced Java Web developers.
P.S - If you like to learn from book, then Pro Spring Security by Carlo Scarioni is a good starting point. The content is not advanced enough for senior developers but for junior and intermediate programmer, it's a great book.