Question

I would like to load all all .properties files starting at a certain package level. All in that package and any child packages should be loaded. So for example if I specified my.foo as the starting package, my.foo.MyProperties.properties and my.foo.bar.MyOtherProperties.properties should be picked up. I would prefer (and will accept) a solution that uses the classpath and went into all available .jars, but I will upvote a file based solution as well.

Answer 1

Use reflections. The code should be something like,

    Predicate<String> filter = new FilterBuilder().include(".*\\.properties");
    Reflections reflections = new Reflections(new ConfigurationBuilder()
            .filterInputsBy(filter)
            .setScanners(new ResourcesScanner())
            .setUrls(asList(ClasspathHelper.forJavaClassPath())));
    System.out.println(reflections.getStore().get(ResourcesScanner.class).keySet());

Look at the test code for more examples.