SpringBoot的WebSocket实现单聊群聊
本文实例为大家分享了SpringBoot的WebSocket实现单聊群聊，供大家参考，具体内容如下
说在开头在HTTP协议中，所有的请求都是由客户端发送给服务端，然后服务端发送请求要实现服务器向客户端推送消息有几种methods:
1、轮询
大量无效请求，浪费资源
2、长轮询
有新数据再推送，但这会导致连接超时，有一定隐患
3、Applet和Flash
过时，安全隐患，兼容性不好
消息群发创建新项目:
添加依赖：
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-websocket</artifactId> </dependency> <dependency> <groupId>org.webjars</groupId> <artifactId>sockjs-client</artifactId> <version>1.1.2</version> </dependency> <dependency> <groupId>org.webjars</groupId> <artifactId>jquery</artifactId> <version>3.3.1</version> </dependency> <dependency> <groupId>org.webjars</groupId> <artifactId>stomp-websocket</artifactId> <version>2.3.3</version> </dependency> <dependency> <groupId>org.webjars</groupId> <artifactId>webjars-locator-core</artifactId></dependency>
创建WebSocket配置类:WebSocketConfig
@Configuration@EnableWebSocketMessageBroker//注解开启webSocket消息代理public class WebSocketConfig implements WebSocketMessageBrokerConfigurer { /** * 配置webSocket代理类 * @param registry */ @Override public void configureMessageBroker(MessageBrokerRegistry registry) { registry.enableSimpleBroker('/topic'); //代理消息的前缀 registry.setApplicationDestinationPrefixes('/app'); //处理消息的方法前缀 } @Override public void registerStompEndpoints(StompEndpointRegistry registry) { registry.addEndpoint('/chat').withSockJS(); //定义一个/chat前缀的endpioint,用来连接 }}
创建Bean
/** * 群消息类 */public class Message { private String name; private String content;//省略getter& setter}
定义controller的方法:
/** * MessageMapping接受前端发来的信息 * SendTo 发送给信息WebSocket消息代理，进行广播 * @param message 页面发来的json数据封装成自定义Bean * @return 返回的数据交给WebSocket进行广播 * @throws Exception */ @MessageMapping('/hello') @SendTo('/topic/greetings') public Message greeting(Message message) throws Exception { return message; }
<html lang='en'><head> <meta charset='UTF-8'> <title>Title</title> <script src='https://rkxy.com.cn/webjars/jquery/jquery.min.js'></script> <script src='https://rkxy.com.cn/webjars/sockjs-client/sockjs.min.js'></script> <script src='https://rkxy.com.cn/webjars/stomp-websocket/stomp.min.js'></script> <script> var stompClient = null; //点击连接以后的页面改变 function setConnected(connection) { $('#connect').prop('disable',connection); $('#disconnect').prop('disable',!connection); if (connection) { $('#conversation').show(); $('#chat').show(); } else { $('#conversation').hide(); $('#chat').hide(); } $('#greetings').html(''); } //点击连接按钮建立连接 function connect() { //如果用户名为空直接跳出 if (!$('#name').val()) { return; } //创建SockJs实例,建立连接 var sockJS = new SockJS('/chat'); //创建stomp实例进行发送连接 stompClient = Stomp.over(sockJS); stompClient.connect({}, function (frame) { setConnected(true); //订阅服务端发来的信息 stompClient.subscribe('/topic/greetings', function (greeting) { //将消息转化为json格式，调用方法展示 showGreeting(JSON.parse(greeting.body)); }); }); } //断开连接 function disconnect() { if (stompClient !== null) { stompClient.disconnect(); } setConnected(false); } //发送信息 function sendName() { stompClient.send('/app/hello',{},JSON.stringify({’name’: $('#name').val() , ’content’: $('#content').val()})); } //展示聊天房间 function showGreeting(message) { $('#greetings').append('<div>'+message.name + ':' + message.content + '</div>'); } $(function () { $('#connect').click(function () { connect(); }); $('#disconnect').click(function () { disconnect(); }); $('#send').click(function () { sendName(); }) }) </script></head><body><div> <label for='name'>用户名</label> <input type='text' placeholder='请输入用户名'></div><div> <button type='button'>连接</button> <button type='button'>断开连接</button></div><div style='display: none;'> <div> <label for='name'></label> <input type='text' placeholder='聊天内容'> </div> <button type='button'>发送</button> <div id='greetings'> <div style='display: none;'>群聊进行中</div> </div></div></body></html>私聊
既然是私聊，就要有对象目标，也是用户，可以用SpringSecurity引入所以添加额外依赖：
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId></dependency>
配置SpringSecurity
@Configurationpublic class WebSecurityConfig extends WebSecurityConfigurerAdapter { @Bean PasswordEncoder passwordEncoder(){ return new BCryptPasswordEncoder(); } @Override protected void configure(AuthenticationManagerBuilder auth) throws Exception { auth.inMemoryAuthentication() .withUser('panlijie').roles('admin').password('$2a$10$5Pf0KhCdnrpMxP5aRrHvMOsvV2fvfWJqk0SEDa9vQ8OWwV8emLFhi') .and() .withUser('suyanxia').roles('user').password('$2a$10$5Pf0KhCdnrpMxP5aRrHvMOsvV2fvfWJqk0SEDa9vQ8OWwV8emLFhi'); } @Override protected void configure(HttpSecurity http) throws Exception { http.authorizeRequests() .anyRequest().authenticated() .and() .formLogin() .permitAll(); }}
在原来的WebSocketConfig配置类中修改：也就是多了一个代理消息前缀:'/queue'
@Configuration@EnableWebSocketMessageBroker//注解开启webSocket消息代理public class WebSocketConfig implements WebSocketMessageBrokerConfigurer { /** * 配置webSocket代理类 * @param registry */ @Override public void configureMessageBroker(MessageBrokerRegistry registry) { registry.enableSimpleBroker('/topic','/queue'); //代理消息的前缀 registry.setApplicationDestinationPrefixes('/app'); //处理消息的方法前缀 } @Override public void registerStompEndpoints(StompEndpointRegistry registry) { registry.addEndpoint('/chat').withSockJS(); //定义一个/chat前缀的endpioint,用来连接 }}
创建Bean:
public class Chat { private String to; private String from; private String content;//省略getter& setter}
添加controller方法：
/** * 点对点发送信息 * @param principal 当前用户的信息 * @param chat 发送的信息 */ @MessageMapping('chat') public void chat(Principal principal, Chat chat) { //获取当前对象设置为信息源 String from = principal.getName(); chat.setFrom(from); //调用convertAndSendToUser('用户名','路径','内容'); simpMessagingTemplate.convertAndSendToUser(chat.getTo(), '/queue/chat', chat); }
创建页面：
<html lang='en'><head> <meta charset='UTF-8'> <title>Title</title> <script src='https://rkxy.com.cn/webjars/jquery/jquery.min.js'></script> <script src='https://rkxy.com.cn/webjars/sockjs-client/sockjs.min.js'></script> <script src='https://rkxy.com.cn/webjars/stomp-websocket/stomp.min.js'></script> <script> var stompClient = null; function connect() { var socket = new SockJS('/chat'); stompClient = Stomp.over(socket); stompClient.connect({}, function (frame) { stompClient.subscribe(’/user/queue/chat’, function (chat) { showGreeting(JSON.parse(chat.body)); }); }); } function sendMsg() { stompClient.send('/app/chat',{},JSON.stringify({’content’ : $('#content').val(), ’to’: $('#to').val()})); } function showGreeting(message) { $('#chatsContent').append('<div>' + message.from + ':' + message.content + '</div>'); } $(function () { connect(); $('#send').click(function () { sendMsg(); }); }); </script></head><body><div id='chat'> <div id='chatsContent'> </div> <div> 请输入聊天内容 <input type='text' placeholder='聊天内容'> <input type='text' placeholder='目标用户'> <button type='button' id='send'>发送</button> </div></div></body></html>
暂结！
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持好吧啦网。
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