How to read a directory from the runtime classpath?

Question

My Java application needs to be able to find a myconfig/ directory which will be bundled inside the same JAR:

myjar.jar/
    com/
        me/
           


        

Answer 1

You can use the PathMatchingResourcePatternResolver provided by Spring.

public class SpringResourceLoader {

    public static void main(String[] args) throws IOException {
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();

        // Ant-style path matching
        Resource[] resources = resolver.getResources("/myconfig/**");

        for (Resource resource : resources) {
            InputStream is = resource.getInputStream();
            ...
        }
    }
}

I didn't do anything fancy with the returned Resource but you get the picture.

Add this to your maven dependency (if using maven):

    org.springframework
    spring-core
    3.1.2.RELEASE