SpringBoot的WebSocket實現單聊群聊
本文實例為大家分享了SpringBoot的WebSocket實現單聊群聊，供大家參考，具體內容如下
說在開頭在HTTP協議中，所有的請求都是由客戶端發送給服務端，然后服務端發送請求要實現服務器向客戶端推送消息有幾種methods:
1、輪詢
大量無效請求，浪費資源
2、長輪詢
有新數據再推送，但這會導致連接超時，有一定隱患
3、Applet和Flash
過時，安全隱患，兼容性不好
消息群發創建新項目:
添加依賴：
<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>
創建WebSocket配置類:WebSocketConfig
@Configuration@EnableWebSocketMessageBroker//注解開啟webSocket消息代理public class WebSocketConfig implements WebSocketMessageBrokerConfigurer { /** * 配置webSocket代理類 * @param registry */ @Override public void configureMessageBroker(MessageBrokerRegistry registry) { registry.enableSimpleBroker('/topic'); //代理消息的前綴 registry.setApplicationDestinationPrefixes('/app'); //處理消息的方法前綴 } @Override public void registerStompEndpoints(StompEndpointRegistry registry) { registry.addEndpoint('/chat').withSockJS(); //定義一個/chat前綴的endpioint,用來連接 }}
創建Bean
/** * 群消息類 */public class Message { private String name; private String content;//省略getter& setter}
定義controller的方法:
/** * MessageMapping接受前端發來的信息 * SendTo 發送給信息WebSocket消息代理，進行廣播 * @param message 頁面發來的json數據封裝成自定義Bean * @return 返回的數據交給WebSocket進行廣播 * @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; //點擊連接以后的頁面改變 function setConnected(connection) { $('#connect').prop('disable',connection); $('#disconnect').prop('disable',!connection); if (connection) { $('#conversation').show(); $('#chat').show(); } else { $('#conversation').hide(); $('#chat').hide(); } $('#greetings').html(''); } //點擊連接按鈕建立連接 function connect() { //如果用戶名為空直接跳出 if (!$('#name').val()) { return; } //創建SockJs實例,建立連接 var sockJS = new SockJS('/chat'); //創建stomp實例進行發送連接 stompClient = Stomp.over(sockJS); stompClient.connect({}, function (frame) { setConnected(true); //訂閱服務端發來的信息 stompClient.subscribe('/topic/greetings', function (greeting) { //將消息轉化為json格式，調用方法展示 showGreeting(JSON.parse(greeting.body)); }); }); } //斷開連接 function disconnect() { if (stompClient !== null) { stompClient.disconnect(); } setConnected(false); } //發送信息 function sendName() { stompClient.send('/app/hello',{},JSON.stringify({’name’: $('#name').val() , ’content’: $('#content').val()})); } //展示聊天房間 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'>用戶名</label> <input type='text' placeholder='請輸入用戶名'></div><div> <button type='button'>連接</button> <button type='button'>斷開連接</button></div><div style='display: none;'> <div> <label for='name'></label> <input type='text' placeholder='聊天內容'> </div> <button type='button'>發送</button> <div id='greetings'> <div style='display: none;'>群聊進行中</div> </div></div></body></html>私聊
既然是私聊，就要有對象目標，也是用戶，可以用SpringSecurity引入所以添加額外依賴：
<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(); }}
在原來的WebSocketConfig配置類中修改：也就是多了一個代理消息前綴:'/queue'
@Configuration@EnableWebSocketMessageBroker//注解開啟webSocket消息代理public class WebSocketConfig implements WebSocketMessageBrokerConfigurer { /** * 配置webSocket代理類 * @param registry */ @Override public void configureMessageBroker(MessageBrokerRegistry registry) { registry.enableSimpleBroker('/topic','/queue'); //代理消息的前綴 registry.setApplicationDestinationPrefixes('/app'); //處理消息的方法前綴 } @Override public void registerStompEndpoints(StompEndpointRegistry registry) { registry.addEndpoint('/chat').withSockJS(); //定義一個/chat前綴的endpioint,用來連接 }}
創建Bean:
public class Chat { private String to; private String from; private String content;//省略getter& setter}
添加controller方法：
/** * 點對點發送信息 * @param principal 當前用戶的信息 * @param chat 發送的信息 */ @MessageMapping('chat') public void chat(Principal principal, Chat chat) { //獲取當前對象設置為信息源 String from = principal.getName(); chat.setFrom(from); //調用convertAndSendToUser('用戶名','路徑','內容'); simpMessagingTemplate.convertAndSendToUser(chat.getTo(), '/queue/chat', chat); }
創建頁面：
<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> 請輸入聊天內容 <input type='text' placeholder='聊天內容'> <input type='text' placeholder='目標用戶'> <button type='button' id='send'>發送</button> </div></div></body></html>
暫結！
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。
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