Basics of Spring Security in Spring Boot

Spring Security is a powerful framework that provides authentication, authorization, and access control for web applications. In this blog post, we will explore how to use Spring Security to secure a web application with code examples.

Step 1: Setting up the project

The first step is to set up a Spring Boot project with the necessary dependencies. We will use Spring Boot Starter Web and Spring Security dependencies. To set up the project, create a new Spring Boot project in your IDE of choice and add the following dependencies to your pom.xml file:

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-security</artifactId>
</dependency>

Step 2: Creating a UserDetailsService

The UserDetailsService interface is used to retrieve user details from a database or any other data source. We will create an implementation of this interface to retrieve user details from a database. Here’s an example: