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Security is a crucial aspect of many applications. Spring Security provides a mechanism for securing your application that’s simple, flexible, and powerful.
Using a series of servlet filters, Spring Security can control access to web resources, including Spring MVC controllers. And by employing aspects, you can also secure method invocations with Spring Security. But thanks to Spring Security’s configuration namespace, you don’t need to deal with the filters or aspects directly. Security can be declared concisely.