I am struggling with the string split method and the caret symbol (^) in java.
我正在努力使用java中的字符串拆分方法和插入符号(^)。
Input:
value1^value2^value3\^value3part2
Expected output:
[value1, value2, value3^value3part2]
Can anyone please provide a solution for this?
有谁能请为此提供解决方案?
I have tried multiple solutions but with no success.
我尝试了多种解决方案但没有成功。
Thank you.
1 个解决方案
#1
3
Based on your comments it looks like you want to split only on ^ if it is not preceded by \. In that case you can use negative look-behind mechanism (?<!...) which tests if part which we are trying to match is not preceded by regex described in ....
根据您的评论,如果它没有以\开头,您似乎只想在^上拆分。在这种情况下,你可以使用负面的后视机制(?
In your case you can use it like:
在您的情况下,您可以使用它:
String[] values = yourLine.split("(?<!\\\\)\\^");
So you want to split
所以你想拆分
- on
^(we needed to escape it\\^since^it is one of regex metacharacters), - which doesn't have
\before(?<!\\\\)- we needed to escape\twice, once in regex, once in string literal.
on ^(我们需要将其转义为\\ ^,因为^它是正则表达式元字符之一),
哪个没有\ before(?
#1
3
Based on your comments it looks like you want to split only on ^ if it is not preceded by \. In that case you can use negative look-behind mechanism (?<!...) which tests if part which we are trying to match is not preceded by regex described in ....
根据您的评论,如果它没有以\开头,您似乎只想在^上拆分。在这种情况下,你可以使用负面的后视机制(?
In your case you can use it like:
在您的情况下,您可以使用它:
String[] values = yourLine.split("(?<!\\\\)\\^");
So you want to split
所以你想拆分
- on
^(we needed to escape it\\^since^it is one of regex metacharacters), - which doesn't have
\before(?<!\\\\)- we needed to escape\twice, once in regex, once in string literal.
on ^(我们需要将其转义为\\ ^,因为^它是正则表达式元字符之一),
哪个没有\ before(?