jexp

@Path("/")
public class StaticWebResource {

    @GET
    @Path("{file:(?i).+\\.(png|jpg|jpeg|svg|gif|html?|js|css|txt)}")
    public Response file(@PathParam("file") String file) throws IOException {
        InputStream fileStream = findFileStream(file);
        if (fileStream == null) return Response.status(Response.Status.NOT_FOUND).build();
        else return Response.ok(fileStream, mediaType(file)).build();
    }