Apart from the actual authentication mechanism, many aspects of the application are quite similar. In this section, we will set up the example and then cover the specific authentication mechanism in detail.

We will be using the default Spring Security DB schema against which we will authenticate the user. We will create a fully fledged Spring MVC web application, with each component being created from scratch. Creating a sample Spring Security application using Spring MVC with the help of Spring Boot is very easy. The application will function through many things that are hidden away from developers. But in this case, we will be creating this application component by component so that you can see the actual code with which a web application that is built on Spring MVC can be secured.

The default DB schema used by Spring Security is shown in the following diagram. However, you can customize it the way you think it is suitable for your application. We will be using the Users and Authorities tables for our setup here:

Let's now start developing our sample application.