Spring Boot allows you to customize your application configurations and you can use the same application code in different environments such as staging, production, and so on. Spring Boot provides several methods for this customization—you can use properties files, YAML files, environment variables, and command-line arguments to externalize configuration.
Spring Boot gives you a free hand to override auto-configuration using a lot of Spring Boot properties. So that you can easily override these properties. Let's see how to override the values of these Spring Boot properties using the application.properties file. By default, Spring Boot looks for application.properties in these locations (in this order): ...
