java(java8 CompletableFuture)异步执行之后获取回调

    public static void main(String[] args) {
        //批量异步
        ExecutorService executor = Executors.newFixedThreadPool(1000);
        for (int i = 0; i < 10; i++) {
            CompletableFuture<String> future = CompletableFuture.supplyAsync(new Supplier<String>() {
                @Override
                public String get() {
                    String uuid = UUID.randomUUID().toString();
                    System.out.println("线程" + uuid + "开始了");
                    try {
                        Thread.sleep(2000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    return uuid;
                }
            }, executor);
            future.thenAccept(uuid -> System.out.println("线程" + uuid + "结束了"));
        }
        //关闭线程池
        executor.shutdown();
        try {
            if (executor.awaitTermination(Long.MAX_VALUE, TimeUnit.NANOSECONDS)) {
                System.out.println("所有任务已经执行完毕");
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }