基本时间算法

    @Scheduled(cron = "0 0 10 * * ?")
    private void returnEquipmentTask() {
        Example exampleReturn = new Example(DeviceEntity.class);
        Example.Criteria criteriaReturn = exampleReturn.createCriteria();
        criteriaReturn.andEqualTo("state", 3);
        List<DeviceEntity> deviceLendRecordEntitiesReturn = deviceMapper.selectByExample(exampleReturn);
        deviceLendRecordEntitiesReturn.forEach(deviceLendRecordEntity -> {
            Long dateTime = System.currentTimeMillis();
            if (deviceLendRecordEntity.getReturnTime().getTime() <= dateTime) {
                if((dateTime - deviceLendRecordEntity.getReturnTime().getTime()) / (24 * 60 * 60 * 1000)!=0){
                    ...
                }else{
                    if (Math.abs(deviceLendRecordEntity.getReturnTime().getTime() - dateTime) <= 24 * 60 * 60 * 1000 && deviceLendRecordEntity.getReturnTime().getTime() > dateTime) {
                        ...
                    }
                }
            }
        });
    }