spring-boot-rest/spark-java/src/main/java/com/baeldung/sparkjava/HelloWorldService.java

package com.baeldung.sparkjava;

import static spark.Spark.*;

public class HelloWorldService {
    public static void main(String[] args) {
        get("/hello", (req, res) -> "Hello, Baeldung");

        get("/hello/:name", (req, res) -> {
            return "Hello: " + req.params(":name");
        });
    }
}