I configured the preHandle method to get the cookie 'us_au' and set it in 'userContext'. like this.

registry.addInterceptor(new HandlerInterceptor() {
                @Override
                public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
                    Cookie[] cookies = request.getCookies();
                    String path = request.getRequestURI();
                    System.out.println("Request Method: " + request.getMethod());
                    System.out.println("Request Headers: " + Collections.list(request.getHeaderNames()));
                    Cookie us_au;
                    // cookies为空或者不存在名字为us_au的cookie
                    if (Objects.isNull(cookies) || Objects.isNull(us_au = HTTPUtils.getCookie(cookies, "us_au"))
                    ) {
                        System.out.println("拦截器: preHandle - 拦截路径: " + path);
                        return false;
                    }

                    User user;
                    try {
                        user = (User) HTTPUtils.validateCookie(us_au);
                    } catch (Exception e) {
                        System.out.println("拦截器: preHandle - 拦截路径: " + path);
                        return false;
                    }
                    userContext.setCurrentUser(user);
                    System.out.println("userid:" + userContext.getCurrentUser());
                    System.out.println("拦截器: preHandle - 释放路径: " + path);
                    return true;
                }
            })

UserContext uses ThreadLocal storage

@Component
public class UserContext {
    private static final ThreadLocal<User> currentUser = new ThreadLocal<>();

public void setCurrentUser(User user) {
    currentUser.set(user);
}

public User getCurrentUser() {
    return currentUser.get();
}

public void clear() {
    currentUser.remove();
}
}

and then I want to get the user's ID in 'Functs.java', but result is NULL

@Configuration(proxyBeanMethods = false)
public class Functs {
    @Resource
    private UserContext userContext;

    public record MusicUserID(@ToolParam(description = "这是歌曲") String name
            , @ToolParam(description = "这是歌手") String k) {
    }

@Bean
@Description("添加音乐到我喜欢")
Function<MusicUserID, Boolean> addLike() {
    return (music) -> {
        System.out.println("music.name " + music.name());
        System.out.println("user:" + userContext.getCurrentUser()); // it is null
        System.out.println("music.zjl " + music.k());
        return true;
    };
}
}

If using 'ThreadLocal' is not possible, is there any other way?