What is Spark?
Spark is a simple and lightweight Java web framework built for rapid development. Spark's intention isn't to compete with Sinatra, or the dozen of similar web frameworks in different languages, but to provide a pure Java alternative for developers that want to, or are required to, develop in Java. Spark focuses on being as simple and straight-forward as possible, without the need for cumbersome (XML) configuration, to enable very fast web application development in pure Java with minimal effort. It’s a totally different paradigm when compared to the overuse of annotations for accomplishing pretty trivial stuff seen in other web frameworks
Why use Spark?
If you're a Java developer with neither the urge nor time to learn a new programming language, and you're not planning to build a super large web application that scales in all directions, then Spark might be a great web framework for you. It will have you up and running in minutes, and you won't have to think too much about configuration and boilerplate code
import static spark.Spark.*;
public class HelloWorld
public static void main(String args)
get("/hello", (req, res) -> "Hello World");
For More Documentation visit this link : http://sparkjava.com/documentation.html