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Spring Security and Spring MVC provides multiple ways to access authentication information in your web application. The Authentication method parameter type allows direct access to the authentication object. The @CurrentSecurityContext annotation grants access to the entire security context, providing a comprehensive view of the authentication and other security-related information; remember that it provides the use of SpEL, type conversion and meta-annotations. Finally, the @AuthenticationPrincipal annotation is suitable for extracting type-specific information from the principal, and you can see it as an alias of the @CurrentSecurityContext(expression = "authentication.principal").

By leveraging these mechanisms, you can implement secure and personalized features based on the user's authentication details in your Spring MVC application.

Now let's take a look at each of these in practice.