用於字符串的Powershell正則表達式隨機劃分回車

Question

我正在尋找IP字符串中的文本塊，通常會將IP地址除以回車符。例如...

e c t i o n     
                    1 9 2 
. 1 6 8 . 1 . 2 5 0  S t a t i o n 

我想匹配整個IP地址。我已經嘗試做一個積極的前瞻/ lookbehind像...

(?<=1 9 2)\S+?(?=2 5 .) 

有什麼想法嗎？

Answer 1

回車符只是另一個空白字符（\s）。

你可以使用非捕獲組1-3（(?:pattern)）每個數字後面的空白，以匹配整個IP：(?:(?:(?:\d\s+){1,3})\.\s+){3}(\d\s+){0,2}\d

---

$string = @" 
e c t i o n     
                    1 9 2 
. 1 6 8 . 1 . 2 5 0  S t a t i o n 
"@ 

$Match = $string |Select-String '(?:(?:(?:\d\s+){1,3})\.\s+){3}(\d\s+){0,2}\d' 
$IP = $Match.Matches.Value -replace '\s+' 

Answer 2

說明

((?:(?:[0-9](?:\s[\n\r]|[\r\n]\s|\s)){1,3}(?:\.\s[\n\r]?|\.[\n\r]\s)){3}(?:[0-9](?:\s[\n\r]|[\r\n]\s|\s)){1,3})

這個正則表達式將執行以下操作：

• 匹配子，看起來像IP地址
• 允許IP地址在多行

要跨越例

現場演示

https://regex101.com/r/sG8qS5/3

示例文本

IP address 1 1 9 2 
. 1 6 8 . 1 . 2 5 0  S t a t i o n 
e c t i o n     

IP address 2    1 9 2 . 1 6 
8 . 1 . 2 5 0  S t a t i o n 

IP address 3    1 9 2 . 1 6 
8 . 1 . 2 
5 0  S t a t i o n 

樣品匹配

MATCH 1 
1. [16-43] `1 9 2 
. 1 6 8 . 1 . 2 5 0 ` 

MATCH 2 
1. [123-150] `1 9 2 . 1 6 
8 . 1 . 2 5 0 ` 

MATCH 3 
1. [199-227] `1 9 2 . 1 6 
8 . 1 . 2 
5 0 ` 

說明

NODE      EXPLANATION 
---------------------------------------------------------------------- 
    (      group and capture to \1: 
---------------------------------------------------------------------- 
    (?:      group, but do not capture (3 times): 
---------------------------------------------------------------------- 
     (?:      group, but do not capture (between 1 
           and 3 times (matching the most amount 
           possible)): 
---------------------------------------------------------------------- 
     [0-9]     any character of: '0' to '9' 
---------------------------------------------------------------------- 
     (?:      group, but do not capture: 
---------------------------------------------------------------------- 
      \s      whitespace (\n, \r, \t, \f, and " 
            ") 
---------------------------------------------------------------------- 
      [\n\r]     any character of: '\n' (newline), 
            '\r' (carriage return) 
---------------------------------------------------------------------- 
     |      OR 
---------------------------------------------------------------------- 
      [\r\n]     any character of: '\r' (carriage 
            return), '\n' (newline) 
---------------------------------------------------------------------- 
      \s      whitespace (\n, \r, \t, \f, and " 
            ") 
---------------------------------------------------------------------- 
     |      OR 
---------------------------------------------------------------------- 
      \s      whitespace (\n, \r, \t, \f, and " 
            ") 
---------------------------------------------------------------------- 
     )      end of grouping 
---------------------------------------------------------------------- 
    ){1,3}     end of grouping 
---------------------------------------------------------------------- 
     (?:      group, but do not capture: 
---------------------------------------------------------------------- 
     \.      '.' 
---------------------------------------------------------------------- 
     \s      whitespace (\n, \r, \t, \f, and " ") 
---------------------------------------------------------------------- 
     [\n\r]?     any character of: '\n' (newline), 
           '\r' (carriage return) (optional 
           (matching the most amount possible)) 
---------------------------------------------------------------------- 
     |      OR 
---------------------------------------------------------------------- 
     \.      '.' 
---------------------------------------------------------------------- 
     [\n\r]     any character of: '\n' (newline), 
           '\r' (carriage return) 
---------------------------------------------------------------------- 
     \s      whitespace (\n, \r, \t, \f, and " ") 
---------------------------------------------------------------------- 
    )      end of grouping 
---------------------------------------------------------------------- 
    ){3}      end of grouping 
---------------------------------------------------------------------- 
    (?:      group, but do not capture (between 1 and 
          3 times (matching the most amount 
          possible)): 
---------------------------------------------------------------------- 
     [0-9]     any character of: '0' to '9' 
---------------------------------------------------------------------- 
     (?:      group, but do not capture: 
---------------------------------------------------------------------- 
     \s      whitespace (\n, \r, \t, \f, and " ") 
---------------------------------------------------------------------- 
     [\n\r]     any character of: '\n' (newline), 
           '\r' (carriage return) 
---------------------------------------------------------------------- 
     |      OR 
---------------------------------------------------------------------- 
     [\r\n]     any character of: '\r' (carriage 
           return), '\n' (newline) 
---------------------------------------------------------------------- 
     \s      whitespace (\n, \r, \t, \f, and " ") 
---------------------------------------------------------------------- 
     |      OR 
---------------------------------------------------------------------- 
     \s      whitespace (\n, \r, \t, \f, and " ") 
---------------------------------------------------------------------- 
    )      end of grouping 
---------------------------------------------------------------------- 
    ){1,3}     end of grouping 
---------------------------------------------------------------------- 
)      end of \1 
----------------------------------------------------------------------