import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;

/**
 * @author: baifan
 * @date: 2021/3/8
 */
public class DemoTest {


	public static void main(String[] args) {

		ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(4, 5, 3000, TimeUnit.MILLISECONDS, new ArrayBlockingQueue<>(5));

		List<Integer> ids = new ArrayList<>();
		ids.add(1);
		ids.add(2);
		ids.add(3);

		CompletableFuture<Integer>[] completableFutures = ids.stream().map(id -> {

			return CompletableFuture.supplyAsync(() -> getNewId(id), threadPoolExecutor);

		}).toArray(CompletableFuture[]::new);

		// 等待所有任务执行完
		CompletableFuture.allOf(completableFutures).join();

		for (CompletableFuture<Integer> completableFuture : completableFutures) {
			try {
				System.out.println(completableFuture.get());
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return;
	}

	public static int getNewId(int id) {
		return id + 3;
	}

}

定时任务批处理

public class OrderManualPushJob  {

    /**
     * 手动推送订单查询服务
     */
    @Autowired
    private HotelOrderManualPushServie hotelOrderManualPushServie;

    @Resource(name ="asyncOrderPushServiceExecutor")
    private ExecutorService asyncExecutor;

    @Override
    public void veExecute(ShardingContext shardingContext) {
        long t0 = System.currentTimeMillis();
        //1.从表中查询出1000条数据处理
        List<OrderManualPush> orderManualPushList = hotelOrderManualPushServie.selectUnhandleList();
        if(CollectionUtils.isEmpty(orderManualPushList)){
            return;
        }
        long t1 = System.currentTimeMillis();
        //每条子线程处理数据的数量
        int perCount = 100;
        //拆分集合,每个100
        List<List<OrderManualPush>> partitions = Lists.partition(orderManualPushList, perCount);
        logger.info("批量处理多线程开始,本次处理的订单数量:{}",orderManualPushList.size());
        logger.info("多线程数量:{}",partitions.size());
        List<CompletableFuture> futures = Lists.newArrayList();
        for(List<OrderManualPush> dataList : partitions){
            List<OrderManualPush> finalDataList = dataList;
            CompletableFuture<List<OrderManualPush>> future = CompletableFuture.supplyAsync(() -> pushOrder(finalDataList),asyncExecutor);
            futures.add(future);
        }
        //等待所有线程执行完成
        CompletableFuture.allOf(futures.toArray(new CompletableFuture[futures.size()])).join();
        long t2 = System.currentTimeMillis();
        logger.info("批量处理多线程结束,总耗时:{}ms",t2 - t1);
        //获取线程返回结果,封装集合
        List<OrderManualPush> updateList = new ArrayList<>();
        futures.stream().forEach(future->{
            try {
                List<OrderManualPush> list = (List<OrderManualPush>) future.get();
                if(CollectionUtils.isNotEmpty(list)){
                    updateList.addAll(list);
                }
            }catch (Exception e){
                logger.error("获取多线程返回结果数据异常",e);
            }
        });
        hotelOrderManualPushServie.updateBatchList(updateList);
    }

    /**
     * 推送中间表
     * @param dataList
     * @return
     */
    private List<OrderManualPush> pushOrder(List<OrderManualPush> dataList){
        logger.info("当前线程:{},处理数据量:{},开始时间{}",Thread.currentThread().getName(),dataList.size(),System.currentTimeMillis());
        List<OrderManualPush> updateList = Lists.newArrayList();
        for (OrderManualPush order : dataList){
            OrderManualPush updateBean = BeanMapper.map(order,OrderManualPush.class);
            try {
                //调用推送中间表服务
                hotelZjbService.datafz(order.getDdbh(),order.getDdlx(),new FcmqBody());
                updateBean.setState("1");
            }catch (Exception e){
                updateBean.setState("2");
            }
            updateBean.setUpdateTime(VeDate.getNow());
            updateList.add(updateBean);
        }
        logger.info("当前线程:{},处理数据量:{},结束时间{}",Thread.currentThread().getName(),dataList.size(),System.currentTimeMillis());
        return updateList;
    }
}