替换管道字符“|” 带有转义的 pip 字符“\|” 在 bash 脚本的字符串中
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Replace pipe character "|" with escaped pip character "\|" in string in bash script
提问by álvaro Pérez Soria
I am trying to replace a pipe character in an String with the escaped character in it:
我试图用其中的转义字符替换字符串中的管道字符：
Input: "text|jdbc"Output: "text\|jdbc"
输入：“text|jdbc”输出：“text\|jdbc”
I tried different things with tr:
我用 tr 尝试了不同的事情：
echo "text|jdbc" | tr "|" "\|"
...
But none of them worked. Any help would be appreciated. Thank you,
但他们都没有工作。任何帮助，将不胜感激。谢谢，
回答by janos
tris good for one-to-one mapping of characters (read "translate").
\|is two characters, you cannot use trfor this. You can use sed:
tr适用于字符的一对一映射（阅读“翻译”）。
\|是两个字符，不能tr用于此。您可以使用sed：
echo 'text|jdbc' | sed -e 's/|/\|/'
This example replaces one |. If you want to replace multiple, add the gflag:
此示例替换了一个|. 如果要替换多个，请添加g标志：
echo 'text|jdbc' | sed -e 's/|/\|/g'
An interesting tip by @JuanTomasis to use a different separator character for better readability, for example:
@JuanTomas 的一个有趣提示是使用不同的分隔符来提高可读性，例如：
echo 'text|jdbc' | sed -e 's_|_\|_g'
回答by chepner
You can take advantage of the fact that |is a special character in bash, which means the %qmodifier used by printfwill escape it for you:
您可以利用 中的|特殊字符这一事实bash，这意味着使用的%q修饰符printf将为您转义它：
$ printf '%q\n' "text|jdbc"
text\|jdbc
A more general solution that doesn't require |to be treated specially is
不需要|特殊处理的更通用的解决方案是
$ f="text|jdbc"
$ echo "${f//|/\|}"
text\|jdbc
${f//foo/bar}expands fand replaces every occurance of foowith bar. The operator here is /; when followed by another /, it replaces all occurrences of the search pattern instead of just the first one. For example:
${f//foo/bar}扩展f并替换每次出现的foowith bar。这里的运算符是/; 当后跟 another 时/，它会替换所有出现的搜索模式，而不仅仅是第一个。例如：
$ f="text|jdbc|two"
$ echo "${f/|/\|}"
text\|jdbc|two
$ echo "${f//|/\|}"
text\|jdbc\|two
回答by sat
You can try with awk:
您可以尝试awk：
echo "text|jdbc" | awk -F'|' '=' OFS="\\|"
