SpringBoot 集成webSocket

pom.xml

<?xml version="1.0" encoding="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 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.7.8</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.web.socket</groupId><artifactId>web-socket</artifactId><version>1.0.0</version><properties><java.version>1.8</java.version><spring-boot.version>2.7.8</spring-boot.version></properties><dependencies><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.projectlombok</groupId><artifactId>lombok</artifactId></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.83</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

项目结构 

 websocket主要注解类：

@ServerEndpoint("/im/{username}") 

服务端点（/im/{username}）

ws://127.0.0.1:8080/im/test
@Component   将当前类加入容器中

加上该注解之后不要方法上使用@PathVariable 参数进行接收否则失败

@Data
@Slf4j
@ServerEndpoint("/im/{username}")
@Component
public class WebSocketServerEndpont {private static final ConcurrentHashMap<String, Session> sessionMap = new ConcurrentHashMap<>();private Session session;private String username;@OnOpenpublic void onOpen(Session session) {Map<String, String> pathParameters = session.getPathParameters();String username = pathParameters.get("username");this.username = username;this.session = session;sessionMap.put(username, session);log.info("--------用户:{}登录成功，在线人数：{}", username, sessionMap.size());}@OnClosepublic void onClose() {if (sessionMap.containsKey(username)) {sessionMap.remove(username);}log.info("--------用户:{}退出登录，在线人数：{}", username, sessionMap.size());}@OnMessagepublic void onMessage(Session session, String message) {String from = getUserNameBySession(session);log.info("--------用户:{}发送信息：{}", from, message);sendMessage(message);}private void sendMessage(String message) {String from = getUserNameBySession(session);sessionMap.forEach((k, v) -> {if (!k.equals(from)) {v.getAsyncRemote().sendText(message);}});}@OnErrorpublic void onError(Session session, Throwable throwable) {}private String getUserNameBySession(Session session) {return session.getPathParameters().get("username");}}

启动：使用websocket在线工具: ws://127.0.0.1:8080/im/test,开启两个浏览器即可实现聊天

关于部署到linux 访问不到的问题：

首先ssl 证书要配置好。

nginx配置：

upstream  sockets {server 127.0.0.1:8080 max_fails=3 fail_timeout=10s; 
}
server {listen 443 ssl;server_name 域名;#调整成自己的证书即可，重点重点重点ssl_certificate /etc/nginx/cert/ssl.pem;ssl_certificate_key /etc/nginx/cert/ssl.key;ssl_session_timeout 5m;#通过location进行处理，重点重点重点location / {proxy_pass http://sockets;proxy_http_version 1.1;proxy_set_header Upgrade $http_upgrade;proxy_set_header Connection "upgrade";}error_page 404 /404.html;
}

服务地址要使用：wss://域名/im/test

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