mysql中in 大量数据 分组查询

	Integer size = 200;
		Integer total = orders.size();
		Integer pages = total % size == 0 ? total / size : total / size + 1;

//线程池
		ExecutorService service = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());

		List<InOrderIds> callables = new ArrayList<>();
		for (int i = 0; i < pages; i++) {
			Integer toIndex = (i + 1) * size > total ? total : (i + 1) * size;
			callables.add(new InOrderIds(orderIds.subList(i * size, toIndex), i));
		}
		List<Future<List<Order>>> futures = service.invokeAll(callables);
		List<Order> finalRes = new ArrayList<Order>(total);
		futures.forEach((f) -> {
			try {
				System.out.println(finalRes.addAll(f.get()));
			} catch (InterruptedException | ExecutionException e) {
				e.printStackTrace();
			}
		});
		service.shutDown();//释放资源