正则表达式匹配两个{}之间的所有内容 [英] Regex match everything between two {}

问题描述

我在这里正在寻找不同的答案，但是不幸的是，这些答案都不适合我的情况.所以我希望你不要介意.

I was looking at different answers here but unfortunately none of them was good for my case. So I hope you don't mind about it.

因此，我需要匹配两个大括号{}之间的所有内容，除非匹配以@开头且没有这些大括号的情况，例如:

So I need to match everything between two curly brackets {} except situation when match starts with @ and without these curly brackets e.g:

1. 这是超级文本{ match_this }"
2. "{ match_this }"
3. 这是@ {deal_with_it}的另一个示例"

1. "This is a super text {match_this}"
2. "{match_this}"
3. "This is another example @{deal_with_it}"

这是我的测试字符串，1,2,3有效，而最后一个不应该是:

Here are my test strings, 1,2,3 are valid while the last one shouldn't be:

  1   {eww}
  2   r23r23{fetwe}
  3   #{d2dded}
  4   @{d2dded}

我正在尝试:

(?<=[^@]\{)[^\}]*(?=\})

然后只有第2个和第3个选项是匹配项(没有第一个选项) https://regex101.com/r/qRInUf/2/

Then only 2th and 3th options were matches (without the first one) https://regex101.com/r/qRInUf/2/

然后我正在尝试:

\{(.*?)\} or [^@]\{(.*?)\}

在两种情况下我都无法匹配1,2,3值 https://regex101.com/r/uYRtLD/1

In both cases I was unable to match 1,2,3 values https://regex101.com/r/uYRtLD/1

提前感谢您的任何建议.

Thanks in advance for any suggestions.

这是针对Java的.

推荐答案

在此处查看正在使用的正则表达式

(?<=(?<!@)\{)[^}]*(?=})

• (?<=(?<!@)\{)确保后面的正向查找符合以下条件
  • (?<!@)负向查找，确保后面的内容与@字面不符
  • \{从字面上匹配{.
  • (?<=(?<!@)\{) Positive lookbehind ensuring what precedes matches the following
    • (?<!@) Negative lookbehind ensuring what precedes doesn't match @ literally
    • \{ Match { literally.

    结果:

    {eww}           # Matches eww
    r23r23{fetwe}   # Matches fetwe
    #{d2dded}       # Matches d2dded
    @{d2dded}       # Does not match this because @ precedes {
    

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