Just about every application needs a way to save and update data, typically a resource server that is accessible via HTTP. Generally, this data must be secured. Within the Java ecosystem, Spring makes building secure resource servers for your data simple. When coupled with Okta for secure user management, you get professionally maintained OAuth 2.0 and JWT technologies easily integrated into Spring Boot via Spring Security.
In this tutorial, you’re going to build a resource server using Spring Boot and Spring Data JPA. On top of that, you’re going to implement a group-based authentication and authorization layer using OAuth 2.0.