用于匹配各种日期的正则表达式

Question

我正在尝试将正则表达式语句放在一起以匹配以下每种日期格式。

* Mar 7, 2017
Mar. 7, 2017
* March 7, 2017
3-7-2017
03-07-2017
3-7-17
03-07-17
* 03/7/2017
* 03/07/17
* 3/7/17
Mar-07-2017
Mar-7-2017
March-07-2017

以下正则表达式匹配上面星号指示的日期格式。我徒劳地尝试添加到我已经拥有的但没有成功。

([0-9]+)/([0-9]+)/([0-9]+)|([12]\d{3}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01]))|\w+\s\d{2},\s\d{4}|(?i)\b(?:Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May|Jun(?:e)?|Jul(?:y)?|Aug(?:ust)?|Sep(?:tember)?|Oct(?:ober)?|Nov(?:ember)?|Dec](?:ember)?)\b (?:0?[1-9]|[1-2][0-9]|3[01]),? \d{4}

我们将不胜感激任何帮助！

* 加分题 *

在某些情况下，可能有多个日期匹配项，我需要它来找到跟在某个词后面的匹配项。过去，我通过将正则表达式语句括在句点后的括号之间来使用以下语法。

(?<=Word).(StatementHere)

Answer 1

然后试试这个...

([0-9]+)/([0-9]+)/([0-9]+)|((0?[1-9]|1[0-2])-(0?[1-9]|[12]\d|3[01])-(\d{4}|\d{2}))|\w+\s\d{2},\s\d{4}|(?i)\b(Jan(?:uary|\.)?|Feb(?:ruary|\.)?|Mar(?:ch|\.)?|Apr(?:il|\.)?|May|Jun(?:e|\.)?|Jul(?:y|\.)?|Aug(?:ust|\.)?|Sep(?:tember|\.)?|Oct(?:ober|\.)?|Nov(?:ember|\.)?|Dec(?:ember|\.)?)([ ](?:0?[1-9]|[1-2][0-9]|3[01]),?[ ]|-(?:0?[1-9]|[1-2][0-9]|3[01])-)(\d{4})

https://regex101.com/r/k1vaVN/1

Readable version

    ( [0-9]+ )                    # (1)
    /
    ( [0-9]+ )                    # (2)
    /
    ( [0-9]+ )                    # (3)
 |  
    (                             # (4 start)
         ( 0? [1-9] | 1 [0-2] )        # (5)
         -
         ( 0? [1-9] | [12] \d | 3 [01] )  # (6)
         -
         ( \d{4} | \d{2} )             # (7)
    )                             # (4 end)
 |  
    \w+ \s \d{2} , \s \d{4} 
 |  
    (?i)
    \b 
    (                             # (8 start)
         Jan
         (?: uary | \. )?
      |  Feb
         (?: ruary | \. )?
      |  Mar
         (?: ch | \. )?
      |  Apr
         (?: il | \. )?
      |  May
      |  Jun
         (?: e | \. )?
      |  Jul
         (?: y | \. )?
      |  Aug
         (?: ust | \. )?
      |  Sep
         (?: tember | \. )?
      |  Oct
         (?: ober | \. )?
      |  Nov
         (?: ember | \. )?
      |  Dec
         (?: ember | \. )?
    )                             # (8 end)
    (                             # (9 start)
         [ ] 
         (?: 0? [1-9] | [1-2] [0-9] | 3 [01] )
         ,? [ ] 
      |  -
         (?: 0? [1-9] | [1-2] [0-9] | 3 [01] )
         -
    )                             # (9 end)
    ( \d{4} )                     # (10)

更新
只需将日期包装在 (?: ) 组中，然后在
之前添加任何限定符它是你需要的。

word[ ]or[ ]phrase[ ]+\K(?:([0-9]+)/([0-9]+)/([0-9]+)|((0?[1-9]|1[0-2])-(0?[1-9]|[12]\d|3[01])-(\d{4}|\d{2}))|\w+\s\d{2},\s\d{4}|(?i)\b(Jan(?:uary|\.)?|Feb(?:ruary|\.)?|Mar(?:ch|\.)?|Apr(?:il|\.)?|May|Jun(?:e|\.)?|Jul(?:y|\.)?|Aug(?:ust|\.)?|Sep(?:tember|\.)?|Oct(?:ober|\.)?|Nov(?:ember|\.)?|Dec(?:ember|\.)?)([ ](?:0?[1-9]|[1-2][0-9]|3[01]),?[ ]|-(?:0?[1-9]|[1-2][0-9]|3[01])-)(\d{4}))

用于匹配各种日期的正则表达式

RegEx for matching various dates

regex

regex-negation

regex-lookarounds

regex-group

regex-greedy