CountDownLatch的使用

CountDownLatch countDownLatch = new CountDownLatch(list.size());

for (String item : list) {
	threadPool.execute(() -> {
		try {
			// 处理业务 
			// doItem(item);
		} catch (Exception e) {
			log.error("处理业务失败", e);
		} finally {
			countDownLatch.countDown();
		}
	});
}
try {
	countDownLatch.await();
} catch (InterruptedException e) {
	log.error("业务失败", e);
	throw new ServiceException("业务失败");
}