How can I implement OAuth2 in a Spring Boot application?

How can I implement OAuth2 in a Spring Boot application?

To implement OAuth2 in a Spring Boot application, you can use Spring Security's OAuth2 support. Start by adding the necessary dependencies in your pom.xml or build.gradle.

What dependencies do I need to add?

You need to add spring-boot-starter-oauth2-client and spring-boot-starter-security to your project.

Can you provide a sample configuration?

Sure! You can configure your application in application.yml like this:

spring:
  security:
    oauth2:
      client:
        registration:
          my-client:
            client-id: YOUR_CLIENT_ID
            client-secret: YOUR_CLIENT_SECRET
            scope: read,write
            authorization-grant-type: authorization_code
            redirect-uri: http://localhost:8080/login/oauth2/code/my-client
        provider:
          my-provider:
            authorization-uri: https://provider.com/oauth/authorize
            token-uri: https://provider.com/oauth/token
            user-info-uri: https://provider.com/userinfo

What about securing my REST APIs?

You can secure your REST APIs by using @PreAuthorize annotations on your controller methods to enforce access control based on roles.