advancedSpring Security
How do you integrate Spring Boot with Keycloak or Okta?
Add spring-boot-starter-oauth2-resource-server and set spring.security.oauth2.resourceserver.jwt.issuer-uri to the provider's realm URL — Spring auto-discovers the OIDC configuration and validates tokens automatically. For role mapping, customize JwtAuthenticationConverter to pull roles from Keycloak's non-standard realm_access.roles claim.
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