Spring profiles let developers configure their applications to behave differently in various environments. Most Spring profile configurations occur in the application.properties (or YAML) file.

The Spring Boot @ConfigurationProperties simplifies the use of the application.properties file, easing the creation of lists, maps and inner classes.

Navigate to Spring Initializr at start.spring.io and select Generate a Maven Project with Java and Spring Boot 2.0.X, where X is the latest Spring Boot version (2.0.3 at time of this writing).