Is there a way to merge multiple properties files from different maven projects in the same way that maven does war overlays.
Eg if I have 2 different services that both use a core project, can I create a "strings.properties" in all three and have the build merge the strings.properties so that each service can have their own strings file merged with the core version?
Without some more info, it sounds like you need to set up Filtering to merge properties files. This also works really well when you need different property values based on which build profile you may be using.
Check out the Maven page I linked for more info. You can pretty much skip the Hello, World example and go right to the part about creating your own variables.