升级spring boot版本到2.3.0，增加websocket支持

pom.xml

@@ -19,7 +19,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.2.5.RELEASE</version>
+        <version>2.3.0.RELEASE</version>
         <relativePath/>
     </parent>
 
@@ -34,6 +34,10 @@
                 </exclusion>
             </exclusions>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-websocket</artifactId>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-undertow</artifactId>
@@ -131,6 +135,32 @@
             <artifactId>druid</artifactId>
             <version>1.1.21</version>
         </dependency>
+
+        <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>
+
     </dependencies>
 
     <build>

src/main/java/com/yaoxiang/diagnosis/config/WebSocketConfig.java

@@ -0,0 +1,24 @@
+package com.yaoxiang.diagnosis.config;
+
+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("/stomp").withSockJS();
+    }
+
+}

src/main/java/com/yaoxiang/diagnosis/controller/WebsocketController.java

@@ -0,0 +1,17 @@
+package com.yaoxiang.diagnosis.controller;
+
+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 WebsocketController {
+
+    @MessageMapping("/hello")
+    @SendTo("/topic/greetings")
+    public String greeting(String message) throws Exception {
+        Thread.sleep(1000); // simulated delay
+        return "Hello, " + HtmlUtils.htmlEscape(message) + "!";
+    }
+}

src/main/resources/static/app.js

@@ -0,0 +1,52 @@
+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('/stomp');
+    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);
+            showGreeting(greeting.body);
+        });
+    });
+}
+
+function disconnect() {
+    if (stompClient !== null) {
+        stompClient.disconnect();
+    }
+    setConnected(false);
+    console.log("Disconnected");
+}
+
+function sendName() {
+//    stompClient.send("/app/hello", {}, JSON.stringify({'name': $("#name").val()}));
+    stompClient.send("/app/hello", {}, $("#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(); });
+});

src/main/resources/static/websocket.html

@@ -0,0 +1,52 @@
+<!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>