Spring国际认证指南：使用 WebSocket 构建交互式 Web 应用程序

<dependency>
  <groupId>org.webjars</groupId>
  <artifactId>webjars-locator-core</artifactId>
</dependency>
<dependency>
  <groupId>org.webjars</groupId>
  <artifactId>sockjs-client</artifactId>
  <version>1.0.2</version>
</dependency>
<dependency>
  <groupId>org.webjars</groupId>
  <artifactId>stomp-websocket</artifactId>
  <version>2.3.3</version>
</dependency>
<dependency>
  <groupId>org.webjars</groupId>
  <artifactId>bootstrap</artifactId>
  <version>3.3.7</version>
</dependency>
<dependency>
  <groupId>org.webjars</groupId>
  <artifactId>jquery</artifactId>
  <version>3.1.1-1</version>
</dependency>复制

<?xml 版本="1.0" 编码="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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<父>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<版本>2.6.3</版本>
		<relativePath/> <!-- 从存储库中查找父级 -->
	</父>
	<groupId>com.example</groupId>
	<artifactId>messaging-stomp-websocket-complete</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>messaging-stomp-websocket-complete</name>
	<description>Spring Boot 的演示项目</description>
	<属性>
		<java.version>1.8</java.version>
	</属性>
	<依赖项>
		<依赖>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-websocket</artifactId>
		</依赖>
		<依赖>
			<groupId>org.webjars</groupId>
			<artifactId>webjars-locator-core</artifactId>
		</依赖>
		<依赖>
			<groupId>org.webjars</groupId>
			<artifactId>sockjs-client</artifactId>
			<版本>1.0.2</版本>
		</依赖>
		<依赖>
			<groupId>org.webjars</groupId>
			<artifactId>stomp-websocket</artifactId>
			<版本>2.3.3</版本>
		</依赖>
		<依赖>
			<groupId>org.webjars</groupId>
			<artifactId>引导</artifactId>
			<版本>3.3.7</版本>
		</依赖>
		<依赖>
			<groupId>org.webjars</groupId>
			<artifactId>jquery</artifactId>
			<版本>3.1.1-1</版本>
		</依赖>

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

	<构建>
		<插件>
			<插件>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</插件>
		</插件>
	</build>

</项目>

implementation 'org.webjars:webjars-locator-core'
implementation 'org.webjars:sockjs-client:1.0.2'
implementation 'org.webjars:stomp-websocket:2.3.3'
implementation 'org.webjars:bootstrap:3.3.7'
implementation 'org.webjars:jquery:3.1.1-1'复制

插件{
	id 'org.springframework.boot' 版本 '2.6.3'
	id 'io.spring.dependency-management' 版本 '1.0.11.RELEASE'
	标识“java”
}

组 = 'com.example'
版本 = '0.0.1-SNAPSHOT'
源兼容性 = '1.8'

存储库{
	mavenCentral()
}

依赖{
	实现 'org.springframework.boot:spring-boot-starter-websocket'
	实施 'org.webjars:webjars-locator-core'
	实施 'org.webjars:sockjs-client:1.0.2'
	实现 'org.webjars:stomp-websocket:2.3.3'
	实施 'org.webjars:bootstrap:3.3.7'
	实施 'org.webjars:jquery:3.1.1-1'
	testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

测试 {
	使用JUnitPlatform()
}

{
    "name": "Fred"
}复制

package com.example.messagingstompwebsocket;

public class HelloMessage {

  private String name;

  public HelloMessage() {
  }

  public HelloMessage(String name) {
    this.name = name;
  }

  public String getName() {
    return name;
  }

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

{
    "content": "Hello, Fred!"
}复制

package com.example.messagingstompwebsocket;

public class Greeting {

  private String content;

  public Greeting() {
  }

  public Greeting(String content) {
    this.content = content;
  }

  public String getContent() {
    return content;
  }

}复制

package com.example.messagingstompwebsocket;

import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Controller;
import org.springframework.web.util.HtmlUtils;

@Controller
public class GreetingController {


  @MessageMapping("/hello")
  @SendTo("/topic/greetings")
  public Greeting greeting(HelloMessage message) throws Exception {
    Thread.sleep(1000); // simulated delay
    return new Greeting("Hello, " + HtmlUtils.htmlEscape(message.getName()) + "!");
  }

}复制

package com.example.messagingstompwebsocket;

import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer;

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {

  @Override
  public void configureMessageBroker(MessageBrokerRegistry config) {
    config.enableSimpleBroker("/topic");
    config.setApplicationDestinationPrefixes("/app");
  }

  @Override
  public void registerStompEndpoints(StompEndpointRegistry registry) {
    registry.addEndpoint("/gs-guide-websocket").withSockJS();
  }

}复制

<!DOCTYPE html>
<html>
<head>
    <title>Hello WebSocket</title>
    <link href="/webjars/bootstrap/css/bootstrap.min.css" rel="stylesheet">
    <link href="/main.css" rel="stylesheet">
    <script src="/webjars/jquery/jquery.min.js"></script>
    <script src="/webjars/sockjs-client/sockjs.min.js"></script>
    <script src="/webjars/stomp-websocket/stomp.min.js"></script>
    <script src="/app.js"></script>
</head>
<body>
<noscript><h2 style="color: #ff0000">Seems your browser doesn't support Javascript! Websocket relies on Javascript being
    enabled. Please enable
    Javascript and reload this page!</h2></noscript>
<div id="main-content" class="container">
    <div class="row">
        <div class="col-md-6">
            <form class="form-inline">
                <div class="form-group">
                    <label for="connect">WebSocket connection:</label>
                    <button id="connect" class="btn btn-default" type="submit">Connect</button>
                    <button id="disconnect" class="btn btn-default" type="submit" disabled="disabled">Disconnect
                    </button>
                </div>
            </form>
        </div>
        <div class="col-md-6">
            <form class="form-inline">
                <div class="form-group">
                    <label for="name">What is your name?</label>
                    <input type="text" id="name" class="form-control" placeholder="Your name here...">
                </div>
                <button id="send" class="btn btn-default" type="submit">Send</button>
            </form>
        </div>
    </div>
    <div class="row">
        <div class="col-md-12">
            <table id="conversation" class="table table-striped">
                <thead>
                <tr>
                    <th>Greetings</th>
                </tr>
                </thead>
                <tbody id="greetings">
                </tbody>
            </table>
        </div>
    </div>
</div>
</body>
</html>复制

var stompClient = null;

function setConnected(connected) {
    $("#connect").prop("disabled", connected);
    $("#disconnect").prop("disabled", !connected);
    if (connected) {
        $("#conversation").show();
    }
    else {
        $("#conversation").hide();
    }
    $("#greetings").html("");
}

function connect() {
    var socket = new SockJS('/gs-guide-websocket');
    stompClient = Stomp.over(socket);
    stompClient.connect({}, function (frame) {
        setConnected(true);
        console.log('Connected: ' + frame);
        stompClient.subscribe('/topic/greetings', function (greeting) {
            showGreeting(JSON.parse(greeting.body).content);
        });
    });
}

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

function sendName() {
    stompClient.send("/app/hello", {}, JSON.stringify({'name': $("#name").val()}));
}

function showGreeting(message) {
    $("#greetings").append("<tr><td>" + message + "</td></tr>");
}

$(function () {
    $("form").on('submit', function (e) {
        e.preventDefault();
    });
    $( "#connect" ).click(function() { connect(); });
    $( "#disconnect" ).click(function() { disconnect(); });
    $( "#send" ).click(function() { sendName(); });
});复制

package com.example.messagingstompwebsocket;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class MessagingStompWebsocketApplication {

  public static void main(String[] args) {
    SpringApplication.run(MessagingStompWebsocketApplication.class, args);
  }
}复制

java -jar build/libs/gs-messaging-stomp-websocket-0.1.0.jar

java -jar 目标/gs-messaging-stomp-websocket-0.1.0.jar