A Sinatra-inspired micro web framework for Java(sparkjava.com)

    send(JSONSerialization.with(StringSerializer.class, DateTimeSerializer.class).serialize(JSONObjectFactory.put(PairFactory.of(String.class, String.class).getInstance("author", "system"), PairFactory.of(String.class, String.class).getInstance("message", "Only json is allowed"), PairFactory.of(String.class, DateTime.class).getInstance("time", new Date())).getInstance()))

    send(pretty(render(JObject(List(JField("author", JString("system")), JField("message", JString("Only json allowed")), JField("time", JString(new DateTime().getTime().toString()))))

  @Path("/hello")
  public class HelloWorld {
    @GET
    public String get() {
      return "Hello World";
    }
  }

  @Controller
  public class HelloController {
    @RequestMapping(value = "/hello", method = RequestMethod.GET)
    public @ResponseBody String hello() {
      return "Hello World!";
    }
  }
  

  public class HelloWorld {
     public static void main(String[] args) {      
        get(new Route("/hello") {
           @Override
           public Object handle(Request request, Response response) {
              return "Hello World!";
           }
        });
     }
  }

    public String GET_hello(Request req) {
      return "Hello World";
    }