In modern web application development, securing your APIs and front-end applications is a critical task. Spring Security, combined with Keycloak, provides a powerful way to handle authentication and authorization. This guide will walk you through the steps of integrating Spring Security with Keycloak in a Java 17 reactive application.
What is Keycloak?
Keycloak is an open-source identity and access management solution that supports Single Sign-On (SSO), user federation, social login, and fine-grained authorization. It integrates seamlessly with Spring Security to secure Java applications.
Prerequisites
- Java 17 installed on your system
- Maven or Gradle for dependency management
- Keycloak server up and running
- Basic knowledge of Spring Boot and reactive programming with WebFlux
Step 1: Setting Up the Spring Boot Application
Create a new Spring Boot application or use an existing one. Add the following dependencies to your pom.xml or build.gradle:
Maven Dependencies
<dependencies>
<dependency>…
