多线程返回计时问题代码案例

@Component
@Slf4j
@Async
public class ThreadSaveDigCategory {

    private static final int BATCH_COUTN = 1000;

    @Autowired
    private Mapper mapper;

    public Future<Boolean> saveDigCategoryDatas(List<DigCategoryData> digCategoryDataList){
        //开始计时
        long startTime = System.currentTimeMillis();

//        mapper.saveDigCategoryData(digCategoryDataList);
        //数据分批处理
        List<List<DigCategoryData>> batchList = BathProcessUtil.batchList(digCategoryDataList, BATCH_COUTN);
        for (List<DigCategoryData> batch : batchList){
            mapper.saveDigCategoryData(batch);
        }

        //endTime
        long endTime = System.currentTimeMillis();
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(endTime-startTime);
        log.info("耗时: " + calendar.get(Calendar.MINUTE) + "分 " + calendar.get(Calendar.SECOND) + "秒 " +
                calendar.get(Calendar.MILLISECOND) + " 微秒" + "-" + "数据保存成功");

        return new AsyncResult<>(true);
    }
}