java list 分解 java list分批处理

/**
     * @return
     * @Date 14:05 2022/4/11
     * @Param
     **/
    @Transactional(rollbackFor = Exception.class)
    public ExecuteResult updateConnectList(List<YsOrderClothes> orderClothesList) {
        List<Long> collect = orderClothesList.stream().map(YsOrderClothes::getId).collect(Collectors.toList());
        //每批次执行数量
        int batchCount = 1000;
        //获取list中总数量
        int sourListSize = collect.size();
        //需要分多少批
        int subCount = sourListSize % batchCount == 0 ? sourListSize / batchCount : sourListSize / batchCount + 1;
        int startIndext = 0;
        int stopIndext = 0;
        for (int i = 0; i < subCount; i++) {
            stopIndext = (i == subCount - 1) ? getStopIndext(batchCount, sourListSize, stopIndext) : stopIndext + batchCount;
            List<Long> list = new ArrayList<>(collect.subList(startIndext, stopIndext));
            if (CollUtil.isNotEmpty(list)){
                boolean update = orderClothesService.lambdaUpdate().set(YsOrderClothes::getJjIng, 1).in(YsOrderClothes::getId, list).update();
            }
            startIndext = stopIndext;
        }
        /**
         * 起线程执行
         */
        orderClothesConnect.threadUpdateConnect(orderClothesList,sysUser,  factoryId);
        return ExecuteResult.ok();
    }


    /**
     * 计算stop值
     * @param batchCount  一共分多少次
     * @param sourListSize    总数
     * @param stopIndext    停止节点
     * @return
     */
    private static int getStopIndext(int batchCount, int sourListSize, int stopIndext) {
        if (sourListSize == batchCount) {
            return batchCount +stopIndext;
        }else if(sourListSize % batchCount == 0){
            return stopIndext + batchCount;
        }else {
            return sourListSize % batchCount + stopIndext;
        }

    }



/**
 * @program: laundry-service
 * @ClassName Othe
 * @description:
 * @author: XZY
 * @create: 2022-11-04 16:30
 * @Version 1.0
 **/
@Service
@Slf4j
public class OrderClothesConnect {
    @Autowired
    private YsOrderClothesService ysOrderClothesService;

    @Async("threadPoolTaskExecutor")
    public void threadUpdateConnect(List<YsOrderClothes> orderClothesList, SysUser sysUser, Long factoryId){
        log.info("多线程开始执行{}, threadId:{}, threadName:{} ","updateConnectList", Thread.currentThread().getId(), Thread.currentThread().getName());
        ysOrderClothesService.extracted(orderClothesList,sysUser,  factoryId);
        log.info("多线程执行完毕{}, threadId:{}, threadName:{}", "updateConnectList", Thread.currentThread().getId(), Thread.currentThread().getName());
    }

}



/**
     * @param orderClothesList
     * @param sysUser
     * @param factoryId
     */
    @Transactional(rollbackFor = Exception.class)
    public void extracted(List<YsOrderClothes> orderClothesList,SysUser sysUser, Long factoryId) {
		//业务逻辑
    }