springboot整合websocket实现消息推送

maven依赖

代码语言：javascript复制

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>net.dopan</groupId>
	<artifactId>websocket</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>websocket</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.12.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>  <dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.3.2</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-websocket</artifactId>
		</dependency>

		<dependency>
			<groupId>org.assertj</groupId>
			<artifactId>assertj-core</artifactId>
		</dependency>

	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

常量类

代码语言：javascript复制

package net.dopan.websocket.utils;

public class Constant {

    //webSocket相关配置
    //链接地址
    public static String WEBSOCKETPATHPERFIX = "/ws-push";
    public static String WEBSOCKETPATH = "/wsendpoint";
    //消息代理路径
    public static String WEBSOCKETBROADCASTPATH = "/topic";
    //前端发送给服务端请求地址
    public static final String FORETOSERVERPATH = "/welcome";
    //服务端生产地址,客户端订阅此地址以接收服务端生产的消息
    public static final String PRODUCERPATH = "/topic/getResponse";
    //点对点消息推送地址前缀
    public static final String P2PPUSHBASEPATH = "/user";
    //点对点消息推送地址后缀,最后的地址为/user/用户识别码/msg
    public static final String P2PPUSHPATH = "/msg";
}

controller

代码语言：javascript复制

package net.dopan.websocket.controller;

import net.dopan.websocket.po.Message;
import net.dopan.websocket.po.Response;
import net.dopan.websocket.service.WebSocketService;
import net.dopan.websocket.utils.Constant;
import org.assertj.core.util.Lists;
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Controller;

import javax.annotation.Resource;
import java.util.List;

@Controller
public class WsController {

    @Resource
    WebSocketService webSocketService;

    // 测试地址 http://127.0.0.1:8080/index.html?userId=admin
    @MessageMapping(Constant.FORETOSERVERPATH)//@MessageMapping和@RequestMapping功能类似，用于设置URL映射地址，浏览器向服务器发起请求，需要通过该地址。
    @SendTo(Constant.PRODUCERPATH)//如果服务器接受到了消息，就会对订阅了@SendTo括号中的地址传送消息。
    public Response say(Message message) throws Exception {
        List<String> users = Lists.newArrayList();
        users.add(message.getName());//此处只是为了方便测试,此值需要对应页面中订阅个人消息的userId
        webSocketService.send2Users(users, new Response("hello "   message.getName()));

        return new Response("Welcome, "   message.getName()   "!");
    }
}

service

代码语言：javascript复制

package net.dopan.websocket.service;

import net.dopan.websocket.po.Response;
import net.dopan.websocket.utils.Constant;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.messaging.simp.SimpMessagingTemplate;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class WebSocketService {

    @Autowired
    private SimpMessagingTemplate template;

    /**
     * 广播
     * 发给所有在线用户
     *
     * @param msg
     */
    public void sendMsg(Response msg) {

        template.convertAndSend(Constant.PRODUCERPATH, msg);
    }

    /**
     * 发送给指定用户
     *
     * @param users
     * @param msg
     */
    public void send2Users(List<String> users, Response msg) {
        users.forEach(userName -> {
            template.convertAndSendToUser(userName, Constant.P2PPUSHPATH, msg);
        });
    }
}

2个po类

代码语言：javascript复制

package net.dopan.websocket.po;

public class Message {
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

代码语言：javascript复制

package net.dopan.websocket.po;

public class Response {
    private String responseMessage;

    public Response(String responseMessage){
        this.responseMessage = responseMessage;
    }

    public String getResponseMessage() {
        return responseMessage;
    }

    public void setResponseMessage(String responseMessage) {
        this.responseMessage = responseMessage;
    }
}

websocket类

代码语言：javascript复制

package net.dopan.websocket;

import net.dopan.websocket.utils.Constant;
import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.web.socket.config.annotation.AbstractWebSocketMessageBrokerConfigurer;
import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;

@Configuration
// @EnableWebSocketMessageBroker注解用于开启使用STOMP协议来传输基于代理（MessageBroker）的消息，这时候控制器（controller）
// 开始支持@MessageMapping,就像是使用@requestMapping一样。
@EnableWebSocketMessageBroker
public class WebSocketConfig extends AbstractWebSocketMessageBrokerConfigurer {

    @Override
    public void registerStompEndpoints(StompEndpointRegistry stompEndpointRegistry) {
        //注册一个Stomp的节点（endpoint）,并指定使用SockJS协议。
        stompEndpointRegistry.addEndpoint(Constant.WEBSOCKETPATH).withSockJS();
    }

    @Override
    public void configureMessageBroker(MessageBrokerRegistry registry) {
        //服务端发送消息给客户端的域,多个用逗号隔开
        registry.enableSimpleBroker(Constant.WEBSOCKETBROADCASTPATH, Constant.P2PPUSHBASEPATH);
        //定义一对一推送的时候前缀
        registry.setUserDestinationPrefix(Constant.P2PPUSHBASEPATH);
        //定义websoket前缀
        registry.setApplicationDestinationPrefixes(Constant.WEBSOCKETPATHPERFIX);
    }
}

测试html

代码语言：javascript复制

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8" />
    <title>WebSocket</title>

    <script src="https://cdn.bootcss.com/sockjs-client/1.1.4/sockjs.min.js"></script>
    <script src="https://cdn.bootcss.com/stomp.js/2.3.3/stomp.min.js"></script>
    <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.min.js"></script>
    <script th:inline="javascript">
        var $_GET = (function(){
            var url = window.document.location.href.toString();
            var u = url.split("?");
            if(typeof(u[1]) == "string"){
                u = u[1].split("&");
                var get = {};
                for(var i in u){
                    var j = u[i].split("=");
                    get[j[0]] = j[1];
                }
                return get;
            } else {
                return {};
            }
        })();

        var stompClient = null;
        //此值有服务端传递给前端,实现方式没有要求
        var userId = $_GET['userId'];

        function setConnected(connected) {
            document.getElementById('connect').disabled = connected;
            document.getElementById('disconnect').disabled = !connected;
            document.getElementById('conversationDiv').style.visibility = connected ? 'visible' : 'hidden';
            $('#response').html();
        }

        function connect() {
            var socket = new SockJS('/wsendpoint'); //1连接SockJS的endpoint是“wsendpoint”，与后台代码中注册的endpoint要一样。
            stompClient = Stomp.over(socket);//2创建STOMP协议的webSocket客户端。
            stompClient.connect({}, function(frame) {//3连接webSocket的服务端。
                setConnected(true);
                console.log('开始进行连接Connected: '   frame);
                //4通过stompClient.subscribe（）订阅服务器的目标是'/topic/getResponse'发送过来的地址，与@SendTo中的地址对应。
                stompClient.subscribe('/topic/getResponse', function(respnose){
                    showResponse(JSON.parse(respnose.body).responseMessage);
                });
                //4通过stompClient.subscribe（）订阅服务器的目标是'/user/'   userId   '/msg'接收一对一的推送消息,其中userId由服务端传递过来,用于表示唯一的用户,通过此值将消息精确推送给一个用户
                stompClient.subscribe('/user/'   userId   '/msg', function(respnose){
                    console.log(respnose);
                    showResponse1(JSON.parse(respnose.body).responseMessage);
                });
            });
        }


        function disconnect() {
            if (stompClient != null) {
                stompClient.disconnect();
            }
            setConnected(false);
            console.log("Disconnected");
        }

        function sendName() {
            var name = $('#name').val();
            // 通过stompClient.send（）向地址为"/welcome"的服务器地址发起请求，与@MessageMapping里的地址对应。
            // 因为我们配置了registry.setApplicationDestinationPrefixes(Constant.WEBSOCKETPATHPERFIX);所以需要增加前缀/ws-push/
            stompClient.send("/ws-push/welcome", {}, JSON.stringify({ 'name': name }));
        }

        function showResponse(message) {
            var response = $("#response");
            response.html(message);
        }
        function showResponse1(message) {
            var response = $("#response1");
            response.html(message);
        }
    </script>
</head>
<body onload="disconnect()">
<noscript><h2 style="color: #ff0000">貌似你的浏览器不支持websocket</h2></noscript>
<div>
    <div>
        <button id="connect" onclick="connect();">连接</button>
        <button id="disconnect" disabled="disabled" onclick="disconnect();">断开连接</button>
    </div>
    <div id="conversationDiv">
        <label>发送给对方的名字</label><input type="text" id="name" />
        <button id="sendName" onclick="sendName();">发送</button>
        <br />
        广播<p id="response"></p>
        <br />
        私发<p id="response1"></p>
    </div>
</div>

</body>
</html>

html maven controller service websocket

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