M04 Q09 How do you define profile specific property files?

Spring Boot allows you to define profile specific property files in two ways:

Dedicated property file per profile:

application-{profile}.properties
application-{profile}.yml

You can also use application-default.properties or application-default.yml filename to specify property file that should be used when no profile is set

Multi-profile YAML Document

server:
    url: https://local.service.com/
---
spring:
    profiles: dev
server:
    url: https://dev.service.com/
---
spring:
    profiles: prod
server:
    url: https://prod.service.com/