更改

src/main/java/com/njcn/roma/config/WebSocketConfig.java

@@ -0,0 +1,17 @@
+package com.njcn.roma.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.socket.server.standard.ServerEndpointExporter;
+
+@Configuration
+public class WebSocketConfig {
+
+    /**
+     * 用于扫描和注册所有携带ServerEndPoint注解的实例。
+     */
+    @Bean
+    public ServerEndpointExporter serverEndpointExporter() {
+        return new ServerEndpointExporter();
+    }
+}