如果有人会有这个问题，我可以这样在WebsocketConfig中解决我的问题：

If someone will have this question, I solved my problem in WebsocketConfig like this:

@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
    registry.addEndpoint("/chat").setAllowedOrigins("http://localhost:3000").withSockJS();
}