战斗前准备:新建Spring Boot项目选择Thymeleaf和WebSocket依赖 配置WebSocket.需要在配置类上使用@EnableWebSocketMessageBroker开启WebSocket支持,并实现WebSocketMessageBrokerConfigurer接口,重写方法来配置WebSocket (SpringBoot颠覆者里是继承 将stomp.min.js、scokjs.min.js和jquery.js放置在src/main/resources/static下 为ws.html提供便捷的路径映射 跑跑跑起来…
广播式主要有7大步骤
1.配置WebSocket
AbstractWebSocketMessageBrokerConfigurer 类,但是那个类已经过时了)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; /** * 第一步,配置WebSocket.需要在配置类上使用@EnableWebSocketMessageBroker开启WebSocket支持 * 并实现WebSocketMessageBrokerConfigurer接口 * 重写方法来配置WebSocket */ @Configuration //通过@EnableWebSocketMessageBroker注解开启使用STOMP协议在传输基于代理(message broker)的消息 @EnableWebSocketMessageBroker public class WebSocketConfig implements WebSocketMessageBrokerConfigurer { //注册STOMP协议的节点(endpoint),并映射指定的URL public void registerStompEndpoints(StompEndpointRegistry registry){ //注册一个STOMP的endpoint,并指定使用SockJS协议 registry.addEndpoint("/endpointWisely").withSockJS(); } //配置消息代理(Message Broker) public void configureMessageBroker(MessageBrokerRegistry registry){ //广播式配置一个/topic消息代理 registry.enableSimpleBroker("/topic"); } } 2.编写浏览器向服务端发送消息(服务端用该类接收)
//浏览器向服务端发送的消息用此类接收 public class WiselyMessage { public String name; public String getName(){ return name; } } 3. 编写服务端向浏览器发送消息(服务端用该类发送)
//服务端向浏览器发送的此类的消息 public class WiselyResponse { private String responseMessage; public WiselyResponse(String responseMessage){ this.responseMessage = responseMessage; } public String getResponseMessage() { return responseMessage; } } 4. 编写一个Controller用于模拟发送和接收
import org.springframework.messaging.handler.annotation.MessageMapping; import org.springframework.messaging.handler.annotation.SendTo; import org.springframework.stereotype.Controller; import test.demo4.domain.WiselyMessage; import test.demo4.domain.WiselyResponse; @Controller public class WsController { //当浏览器向服务端发送请求时,通过@MessageMapping映射/welcome这个地址,类似于@RequestMapping @MessageMapping("/welcome") //当服务端有消息时,会订阅了@SendTo中的路径的浏览器发送消息 @SendTo("/topic/getResponse") public WiselyResponse say(WiselyMessage message)throws Exception{ Thread.sleep(3000); return new WiselyResponse("Welcome "+message.getName()+" !"); } } 5.添加脚本
找资源太难的话,当然已经为你们准备好啦!
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6. 编写一个页面来演示
<!DOCTYPE html> <html lang="en" xmlns:th="https://www.thymeleaf.org"> <head> <meta charset="UTF-8"> <title>Spring Boot+WebSoc+广播式</title> </head> <body onload="disconnect()"> <noscript><h2 style="color: #ff0000">貌似浏览器不支持WebSocket</h2></noscript> <div> <div> <button id="connect" onclick="connect();">连接</button> <button id="disconnect" onclick="disconnect();">断开连接</button> </div> <div id="conversationDiv"> <label>输入你的名字</label><input type="text" id="name"/> <button id="sendName" onclick="sendName();">发送</button> <p id="response"></p> </div> <script th:src="@{sockjs.min.js}"></script> <script th:src="@{stomp.min.js}"></script> <script th:src="@{jquery.js}"></script> <script type="text/javascript"> var stompClient = null; 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() { //连接SockJS的endpoint名称为"/endpointWisely" var socket = new SockJS('/endpointWisely'); //使用STOMP子协议的WebSocket客户端 stompClient = Stomp.over(socket); //连接WebSocket服务端 stompClient.connect({},function (frame) { setConnected(true); console.log('Connected:'+frame); //通过stompClient.subscribe订阅/topic/getResponse目标(destination)发送消息 //这个是在控制器的@SendTo中定义的 stompClient.subscribe('/topic/getResponse',function (response) { showResponse(JSON.parse(response.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/welcome目标(destination)发送消息 //这个是在控制器的@MessageMapping中定义的 stompClient.send("/welcome",{},JSON.stringify({"name":name})); } function showResponse(message) { var response = $("#response"); response.html(message); } </script> </div> </body> </html> 7. 配置ViewController
将所有/static/** 访问都映射到classpath:/static/ 目录下import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.ViewControllerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; @Configuration public class WebMvcConfig implements WebMvcConfigurer { //为ws.html提供便捷的路径映射 public void addViewControllers(ViewControllerRegistry registry){ registry.addViewController("/ws").setViewName("/ws"); } //将所有/static/** 访问都映射到classpath:/static/ 目录下 public void addResourceHandlers(ResourceHandlerRegistry registry) { System.out.println("==========静态资源拦截！============"); registry.addResourceHandler("/static/**/").addResourceLocations("classpath:/static/"); } }
ps:以上内容参考SpringBoot颠覆者,学习笔记,仅供参考
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