Vert.x初体验

简介

Vert.x项目起始于2011年，最开始的名字叫做 node.x，是一个仿照Node.js以Java开发的，基于EventLoop的异步非阻塞编程框架。Eclipse Vert.x是一个事件驱动的JVM上的框架，可以帮助我们构建现代、灵活、可扩展的程序。

使用Vert.x

1、新建maven项目，导入依赖

<dependencies>
    <dependency>
        <groupId>io.vertx</groupId>
        <artifactId>vertx-core</artifactId>
        <version>3.2.0</version>
    </dependency>
</dependencies>

2、编写主函数

package com.qianyu;

import io.vertx.core.*;
import io.vertx.core.http.*;

public class Server {
    public static void main(String[] args) {
        Vertx vertx = Vertx.vertx();
        HttpServer httpServer = vertx.createHttpServer();
        httpServer.requestHandler(request -> request.response().end("hello, world"));
        httpServer.listen(8000);
    }
}

此时一个端口为8000的http服务器已经开启

3、在IDEA中编写脚本测试

可以看到，返回字符串hello, world

GET http://localhost:8000

HTTP/1.1 200 OK
Content-Length: 12

hello, world

Response code: 200 (OK); Time: 277ms; Content length: 12 bytes

使用路由

1、导入web模块

<dependency>
    <groupId>io.vertx</groupId>
    <artifactId>vertx-web</artifactId>
    <version>3.2.0</version>
</dependency>

2、使用路由

package com.qianyu;

import io.vertx.core.*;
import io.vertx.core.http.*;
import io.vertx.ext.web.*;

public class Server {
    public static void main(String[] args) {
        Vertx vertx = Vertx.vertx();
        Router router = Router.router(vertx);
        router.get("/demo").blockingHandler(context -> {
            context.response().end("hello, world");
        });
        router.post("/demo").blockingHandler(context -> {
            context.response().end("this is post method");
        });
        HttpServer httpServer = vertx.createHttpServer();
        httpServer.requestHandler(router::accept);
        httpServer.listen(8000);
    }
}

3、使用IDEA编写脚本测试

GET http://localhost:8000/demo

HTTP/1.1 200 OK
Content-Length: 12

hello, world

Response code: 200 (OK); Time: 19ms; Content length: 12 bytes

POST http://localhost:8000/demo

HTTP/1.1 200 OK
Content-Length: 19

this is post method

Response code: 200 (OK); Time: 122ms; Content length: 19 bytes