Spark是一个微型的Java Web框架，它的灵感来自于Sinatra，它的目的是让你以最小的代价创建出一个Java Web应用。最近更新到2.0.0，支持Java 8 ，支持Lambda，Demo代码看起来非常有吸引力

最新版本已经可以通过maven center仓库依赖进来

<dependency>
        <groupId>com.sparkjava</groupId>
        <artifactId>spark-core</artifactId>
        <version>2.0.0</version>
</dependency>

入门指南

import static spark.Spark.*;

import spark.*;

public class HelloWorld {

   public static void main(String[] args) {

      get("/hello", (request, response) -> {
         return "Hello World!";
      });

   }

}

运行

http://localhost:4567/hello

是否非常简单？

基本功能

Spark的应用程序的主要构建块是一组路由。路由是由三个部分组成:
一个动词(get, post, put, delete, head, trace, connect, options)
路径(/hello, /users/:name)
一个回调(request, response) -> { }
路由匹配的顺序定义。调用第一个匹配的路由请求。

import static spark.Spark.*;

import spark.Request;
import spark.Response;
import spark.Route;

/**
 * A simple example just showing some basic functionality
 */
public class SimpleExample {

    public static void main(String[] args) {

        //  setPort(5678); <- Uncomment this if you wan't spark to listen on a port different than 4567.

        get("/hello", (request, response) -> {
            return "Hello World!";
        });

        post("/hello", (request, response) -> {
            return "Hello World: " + request.body();
        });

        get("/private", (request, response) -> {
            response.status(401);
            return "Go Away!!!";
        });

        get("/users/:name", (request, response) -> {
           return "Selected user: " + request.params(":name");
        });

        get("/news/:section", (request, response) -> {
           response.type("text/xml");
           return "<?xml version=\"1.0\" encoding=\"UTF-8\"?><news>" + request.params("section") + "</news>";
        });

        get("/protected", (request, response) -> {
           halt(403, "I don't think so!!!");
           return null;
        });

        get("/redirect", (request, response) -> {
           response.redirect("/news/world");
           return null;
        });

        get("/", (request, response) -> {
           return "root";
        });

    }
}

文章转载自 开源中国社区 [http://www.oschina.net]