[英]Regular Expression to match valid dates in different formats
I'm trying to write a regular expression that validates a date.我正在尝试编写一个验证日期的正则表达式。 The regex needs to match the following formats
正则表达式需要匹配以下格式
and should not match formats like DD-MM/YYYY.并且不应匹配 DD-MM/YYYY 等格式。
I have tried this Regex我试过这个正则表达式
'^(?:(?:31(\/|-|\.)(?:0?[13578]|1[02]))\1|(?:(?:29|30)(\/|-|\.)(?:0?[13-9]|1[0-2])\2))(?:(?:1[6-9]|[2-9]\d)?\d{2})$|^(?:29(\/|-|\.)0?2\3(?:(?:(?:1[6-9]|[2-9]\d)?(?:0[48]|[2468][048]|[13579][26])|(?:(?:16|[2468][048]|[3579][26])00))))$|^(?:0?[1-9]|1\d|2[0-8])(\/|-|\.)(?:(?:0?[1-9])|(?:1[0-2]))\4(?:(?:1[6-9]|[2-9]\d)?\d{2})$'
but I am only able to extract the dates with mm/dd/yyyy or mm-dd-yyyy or mm.dd.yyyy format.但我只能提取 mm/dd/yyyy 或 mm-dd-yyyy 或 mm.dd.yyyy 格式的日期。
I also tried using this (?:\\d{2}){1,2}[-|/|.]\\d{2}-|/|.{1,2} where I am getting the dates but I am also getting the values like 5542-21-54, 99/01/2019 which does not represent the date.我也试过用这个 (?:\\d{2}){1,2}[-|/|.]\\d{2}-|/|.{1,2} 在哪里我得到日期但我还获得不代表日期的 5542-21-54、99/01/2019 等值。
Thanks, everyone for the help.谢谢大家的帮助。
If you would like to match days yo need to do this regex:如果你想匹配天你需要做这个正则表达式:
((1|2)[0-9]|3[0-1]|0?[1-9])
For the month you need:对于您需要的月份:
(0?[1-9]|1[0-2])
For the year you need (only 1900 and 2000, for the 3000 you need maybe to update your script when we will arrive in 2999):对于您需要的年份(只有 1900 和 2000,对于 3000,您可能需要在我们 2999 年到达时更新您的脚本):
((19|20)?[0-9]{2})
After you have different delimiter and date orders, so:在您有不同的分隔符和日期顺序后,因此:
((1|2)[0-9]|3[0-1]|0?[1-9])\/(0?[1-9]|1[0-2])\/((19|20)?[0-9]{2}) # for DD/MM/YYYY
((1|2)[0-9]|3[0-1]|0?[1-9])\-(0?[1-9]|1[0-2])\-((19|20)?[0-9]{2}) # for DD-MM-YYYY
((19|20)?[0-9]{2})\/((1|2)[0-9]|3[0-1]|0?[1-9])\/(0?[1-9]|1[0-2]) # for YYYY/DD/MM
((19|20)?[0-9]{2})\-((1|2)[0-9]|3[0-1]|0?[1-9])\-(0?[1-9]|1[0-2]) # for YYYY-DD-MM
...
Finally, you need to combine them and have a single match with (expression1|expression2|...)
:最后,您需要将它们组合起来并与
(expression1|expression2|...)
进行单个匹配:
\W(((1|2)[0-9]|3[0-1]|0?[1-9])\/(0?[1-9]|1[0-2])\/((19|20)?[0-9]{2})|((1|2)[0-9]|3[0-1]|0?[1-9])\-(0?[1-9]|1[0-2])\-((19|20)?[0-9]{2})|((19|20)?[0-9]{2})\/((1|2)[0-9]|3[0-1]|0?[1-9])\/(0?[1-9]|1[0-2])|((19|20)?[0-9]{2})\-((1|2)[0-9]|3[0-1]|0?[1-9])\-(0?[1-9]|1[0-2]))\W
I need the \\W
at the begining and the end of regex.我需要在正则表达式的开头和结尾使用
\\W
。 this one check if you have anything (\\s, \\;, \\,, etc.).这一项检查您是否有任何东西(\\s、\\;、\\ 等)。
You need to complete the missing combinations.您需要完成缺少的组合。
Enjoy ;)享受 ;)
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