shell_字符串截取

字符串的截取

%号截取，删除右边字符，保留左边字符

%t*表示从右边开始，删除第一个 t及右边的字符

i="it seems that i fall in love with you"
echo ${i%t*}

it seems that i fall in love wi

%%m* 表示从右边开始，删除最后（最左边）一个t及右边的字符

i="it seems that i fall in love with you"
echo ${i%%t*}

i

---

#号截取，删除左边字符，保留右边字符。

#*t表示从左边开始，删除第一个 t及左边的字符

i="it seems that i fall in love with you"
echo ${i#*t}

seems that i fall in love with you

##*t表示从左边开始删除最后（最右边）一个t及左边的所有字符

i="it seems that i fall in love with you"
echo ${i##*t}

h you

---

切片截取

从左边第几个字符开始，总字符的个数

从第一个字符开始，总个数为4

i="it seems that i fall in love with you"
echo ${i:0:4}

it s

从左边第几个字符开始，直到结束

从第4个开始，到结束

i="it seems that i fall in love with you"
echo ${i:4}

---

从右边第几个开始，总字符个数

从右边第三个开始算起，向右2个字符

i="it seems that i fall in love with you"
echo ${i:0-3：2}

yo

---

从右边第几个字符开始，直到结束

从右边第三个开始，向右直到结束

i="it seems that i fall in love with you"
echo ${i:0-3}

you

例子：我需要将简书上的文章发布到网站上，我已经下载好了，可是因为有点多，需要每次都手动去一个一个的发布，太麻烦了，所以就想有什么简单的方法可以解决。

#!/bin/bash
#used for create hexo file and cat origin file to it
#author NARCISSUS木

cd /home/narcissus/Downloads/compressd-file/jianshu/user-9937522-1556131627/测试
for i in `ls`
do
		m=${i%.*}
		cd /home/narcissus/Data/HexoBlog
		echo $m
		hexo n draft $m
		if [ $? -eq 0 ];then
				cat /home/narcissus/Downloads/compressd-file/jianshu/user-9937522-1556131627/测试/$i >> ./source/_drafts/$i
		else
				exit
		fi
done