shell 字符串转数组

#!/bin/bash
string="hello,shell,split,test"
#将,替换为空格
array=(${string//,/ })  

for var in ${array[@]}
do
   echo $var
done 

输出

bogon:conf macname$ ./test.sh
hello
shell
split
test

还可以写成

#!/bin/bash
string="hello,shell,split,test"
array=(`echo $string | tr ',' ' '` )  

for var in ${array[@]}
do
   echo $var
done
 

或者

#!/bin/bash
string="hello,shell,split,test"  

#对IFS变量 进行替换处理
OLD_IFS="$IFS"
IFS=","
array=($string)
IFS="$OLD_IFS"

for var in ${array[@]}
do
   echo $var
done

参考：

https://blog.csdn.net/u010003835/article/details/80750003