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This is the most comprehensive guide to Java backend development online. You will learn Java for the backend from scratch to an advanced level, and build a real API along the way.
After a user successfully authenticates with Google, Spring Security retrieves the user's profile information.
Google acts as the Authorization Server, while your Spring Boot application acts as the OAuth2 Client.
Spring Security provides built-in support for OAuth2 and OpenID Connect (OIDC), making it straightforward to integrate third-party identity providers into Spring Boot applications.
Whether you're developing a simple web application or a large distributed system, understanding how software components fit together helps you make better technical decisions from the start.
In this article, we will build a complete JWT-based authentication system using Spring Security 7, Spring Boot 4, and Java 21.