In Spring Boot, application configuration profiles are handled using Spring Profiles. Profiles allow you to define different configurations for various environments (e.g., development, testing, production) and activate them as needed.

  • Defining Profiles:
    • Use the @Profile annotation to mark beans or components to be activated for specific profiles.
    • Example: @Profile("dev") for development-specific beans.
  • Configuration Files:
    • You can create environment-specific property files like application-dev.properties, application-prod.properties, etc.
    • The properties in these files are automatically loaded based on the active profile.
  • Activating Profiles:
    • Use the spring.profiles.active property in application.properties or application.yml to specify which profile is active (e.g., spring.profiles.active=dev).
    • Profiles can also be set using command-line arguments or environment variables.

In summary, Spring Boot profiles allow you to maintain environment-specific configurations, making it easy to switch between different settings for various stages of the application lifecycle.