Kitty, a very lightweight Java microframework!

It uses Eclipse Grizzly HTTP framework as its underlying HTTP server functionality.

The Eclipse Grizzly NIO framework has been designed to help developers to take advantage of the Java™ NIO API.

Install Kitty

$ git clone
$ cd kitty
$ git checkout develop
$ ./mvnw install

Add as dependency


Sample Application

import com.julianjupiter.kitty.Configuration;
import com.julianjupiter.kitty.HttpMethod;
import com.julianjupiter.kitty.Kitty;

import java.util.Map;
import java.util.Set;

public class App {
    public static void main(String[] args) throws Exception {
        Configuration configuration = Configuration.builder()

        Kitty.create(configuration, router -> router
                .get("/users/{id:[0-9]+}", (request, response) -> response.body("Hi user 1!"))
                .anyOf(Set.of(HttpMethod.GET, HttpMethod.POST), "/greetings", (request, response) -> response.body(Map.of("name", "Kitty")).render("greetings")).withoutContextPath()
                .get("/hi", (request, response) -> response.body("Hi"))
                .any("/about", (request, response) -> response.render("about")).withoutContextPath()
        ).run(7001, () -> System.out.println("App is listening on port " + 7001 + "..."));


Check out complete sample project: kitty-sample