Prefixed Properites extends java.util.Properties with the advantage that it supports filtering of properties by a prefix or set environment. You can have cascading environments like a staging level, a host, a group, a service, a component, and many more. Use them all together within one configuration file, and define defaults for any key on any environment level. Use XML, properties, and JSON files to load and store your configuration. You can also change the configuration on the fly on a request-dependent level. Prefixed Properties can be used on a standalone basis, or you can use it within your SpringContext.