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