java连接websocket服务器并发送消息

一、用python快速启动一个websocker服务器

import tornado.ioloop
import tornado.web
import tornado.websocket


class WebSocketHandler(tornado.websocket.WebSocketHandler):
    def open(self):
        print("WebSocket 连接已建立")

    def on_message(self, message):
        print("收到消息：", message)
        self.write_message("收到了你的消息：" + message)

    def on_close(self):
        print("WebSocket 连接已关闭")


def make_app():
    return tornado.web.Application([
        (r"/websocket", WebSocketHandler),
    ])


if __name__ == "__main__":
    app = make_app()
    app.listen(8080)
    print("WebSocket 服务器已启动，端口号：8080")
    tornado.ioloop.IOLoop.current().start()

二、使用java连接并发送消息

package com.ciih.iot.common.util;


import javax.websocket.*;
import java.net.URI;

@ClientEndpoint
public class WebSocketClient {

    @OnOpen
    public void onOpen(Session session) {
        System.out.println("Connection established");
        try {
            // 发送一条消息到服务器
            session.getBasicRemote().sendText("Hello, WebSocket Server!");
            System.out.println("建立连接");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @OnMessage
    public void onMessage(String message) {
        System.out.println("Received message: " + message);
    }

    @OnClose
    public void onClose(Session session, CloseReason reason) {
        System.out.println("Connection closed: " + reason.getReasonPhrase());
    }


    public static void pushMessage(String url, String message) {
        try {
            WebSocketContainer container = ContainerProvider.getWebSocketContainer();
            Session session = container.connectToServer(WebSocketClient.class, new URI(url));
            session.getBasicRemote().sendText(message);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        WebSocketClient.pushMessage("ws://localhost:8080/websocket","来自火星");
    }
}