Settings4j is deprecated and no longer in development.
As alternative you should use the Standard way of Spring-Boot: https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html
It is not configurable like Settings4j, but you can configure your application in multiple ways like:
- JNDI attributes from java:comp/env.
- Java System properties (System.getProperties()).
- OS environment variables.
- application property or YAML Files.
The old documentation of Settings4j can be found here: https://github.com/brabenetz/settings4j/blob/master/README_original.md