Why does this Regex not work Properly?
i have the Following Regex:
^d{1,5}.*[^0-9][0-9]{5}$
and the following text: 123 King Drive 12 OH 12345
i want to match the strings which start with a 1 to 5-digit number and end with a 5-digit number and have no other numbers between them. But i always get the whole text as a match although it should skip because of the 12 which is between 123 and 12345 .
Why is this happening? shouldn't [^0-9] do the trick?
In your regex:
^d{1,5}.*[^0-9][0-9]{5}$
And example text:
123 King Drive 12 OH 12345
--
^d{1,5} is matching "123"
.* is matching " King Drive 12 OH"
[^0-9] is matching " "
[0-9]{5}$ is matching "12345"
As others have also suggested, something like this would avoid this issue, as you are explicitly saying (unlike by using ".*") not to match any non-digits in the middle of the string:
^d{1,5}D+d{5}$
Based on the description you make of your requirement, you seem to want this :
^d{1,5}[^0-9]*[0-9]{5}$
The .* part was matching anything, so not excluding the digits.
You need:
^d{1,5}D*d{5}$
This reads as "1-5 digits, followed by any number of non-digit characters, followed by 5 digits." If you want at least 1 non-digit character, use D+ .
Your previous regex would match because ' King Drive 12 OH' would match .* and ' ' would match the single character [^0-9] .
上一篇: 9]在.NET正则表达式中
下一篇: 为什么这个正则表达式不能正常工作？