解决SpringBoot连接Websocket报：请求路径 404 No static resource websocket.

问题发现

最近在工作中用到了WebSocket进行前后端的消息通信，后端代码编写完后，测试一下是否连接成功，发现报No static resource websocket.，看这个错貌似将接口变成了静态资源来访问了，第一时间觉得是端点没有注册成功，示例代码如下：

@EnableWebSocketMessageBroker
@Configurable
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/websocket") // 注册端点
                .addInterceptors(handshakeInterceptor()) // 拦截器
                .setAllowedOrigins("*") // 跨域配置
                .withSockJS() // 启动wockjs支持
                .setHeartbeatTime(5000) // 设置心跳时间 5s
        ;
    }

    @Override
    public void configureMessageBroker(MessageBrokerRegistry registry) {
        //指定了消息代理的目标前缀，即服务器会将以“/screen/user”大屏用户
        registry.enableSimpleBroker("/app");
    }

    @Override
    public void configureWebSocketTransport(final WebSocketTransportRegistration registry) {
        registry.setSendTimeLimit(15 * 1000); // 发送消息的最大时间限制
        registry.setMessageSizeLimit(128 * 1024); // 设置文本消息的大小限制
        registry.setSendBufferSizeLimit(512 * 1024); //发送缓冲区的最大大小限制
    }

    @Bean
    public HandshakeInterceptor handshakeInterceptor() {
        return new StaffHandshakeInterceptor();
    }
}
@Slf4j
public class StaffHandshakeInterceptor implements HandshakeInterceptor {
    @Override
    public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Map<String, Object> attributes) throws Exception {
        log.info("WebSocket 握手连接前处理");
        return true;
    }

    @Override
    public void afterHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Exception exception) {
        log.info("WebSocket 握手连接后处理");
    }
}