字符串分割示例如下：

hours="00,01,02"
IFS=","
arr=($hours)
for hour in ${arr[@]};do
    echo $hour
done

hours=("00,01,02,03,04,05,06,07,08,09,10,11,12,13,14,15,16,17,18,19,20,21,22,23") IFS=","
for hour in ${hours[@]};do
    echo $hour
done