RequestContextHolder.getRequestAttributes()在@Async之后获取null

ThreadLocal<ServletRequestAttributes> requestAttributesHolder = new ThreadLocal<>();
requestAttributesHolder.set((ServletRequestAttributes) RequestContextHolder.getRequestAttributes());

CompletableFuture.supplyAsync(() -> {
    // 在异步任务中获取请求属性
    ServletRequestAttributes requestAttributes = requestAttributesHolder.get();
    // 执行异步任务的逻辑
    // ...
    return result;
});

CompletableFuture.supplyAsync(() -> {
    // 在异步任务中获取请求属性
    ServletRequestAttributes requestAttributes = requestAttributesHolder.get();
    // 执行异步任务的逻辑
    // ...
    return result;
}).whenComplete((result, throwable) -> {
    // 异步任务执行完毕后清除ThreadLocal
    requestAttributesHolder.remove();
});