Spring Boot and multiple external configuration files

To use multiple external configuration files with Spring Boot, you can use the spring.config.name property to specify the file prefix. By default, Spring Boot looks for application.properties or application.yml. When you set spring.config.name, Spring Boot searches the standard configuration locations for files matching the specified prefix (e.g., config1.properties, config1.yml, config2.properties, config2.yml).

For example, if you want to use multiple external configuration files named config1.properties and config2.properties, you can specify the spring.config.name property as follows:

spring.config.name=config1,config2

Spring Boot will then search the standard configuration locations (such as the config subdirectory and the current directory) for files matching the config1 and config2 prefixes. You can apply this setting via the command line, an environment variable, or in a primary application.properties file.

You can also specify the location of the configuration files using the spring.config.additional-location property. This property allows you to specify additional directories or classpath locations where Spring Boot should look for the configuration files.

For example:

spring.config.additional-location=file:/etc/myapp/config/,classpath:/config/

This tells Spring Boot to look for the configuration files in the /etc/myapp/config/ directory and in the config directory on the classpath.

I hope this helps! Let me know if you have any other questions.