Test the regular address online
tool.oschina.net/regex/
Tencent QQ number
Tencent QQ id starts from 10000
[1-9] [0-9] {4}
China Postcode
Chinese postcodes are six digits long
[1-9]\d{5}(? ! \d)
[email protected] can contain only letters, digits, underscores (_), periods (.), and hyphens (-)
^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$
[email protected] The name can contain Chinese characters, letters, and digits, and the domain name can only contain English domain names
^[A-Za-z0-9\u4e00-\u9fa5]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$
The phone
13412345678 mobile phone no.
^1(3|4|5|6|7|8|9)\d{9}$
Xxxx-xxxxxxx XXXX-XXXXXXXX Fixed telephone number
(\ \ d {3, 4} \) | \ d {3, 4} – | \ s)? \d{8}
The domain name
[https://google.com/](https://google.com/)
^((http:\/\/)|(https:\/\/))? ([a – zA – Z0-9] ([a zA – Z0-9 \], 21 {0} [a – zA – Z0-9])? \.) + [a zA – Z] {2, 6} (\ /)
Id card
Fifteen or eighteen
^\d{15}|\d{18}$
IP
127.0.0.1
((? : (? :25[0-5]|2[0-4]\d|[01]? \d? \d)\.) {3} (? :25[0-5]|2[0-4]\d|[01]? \d? \d))
Account check
Xxxzhang_001 must start with a letter and contain 5 to 16 bytes. Alphanumeric underscores (_) are allowed
^ [a zA – Z] [a – zA – Z0-9 _] {4, 15} $
The date of
The date format
^ \ d {4} \ d {1, 2} – \ d {1, 2}
Twelve months of the year
(01 ~ 09 and 1 ~ 12)
^ (0? [1-9] [2-0]) $| 1
31 days in a month
(01 ~ 09 and 1 ~ 31)
^ ((0? [1-9]) | | 2 (1) ([0-9]) | | 31) $30
Character checking
Blank lines
Can be used to delete blank lines
\n\s*\r
HTML tags
<(\S*?) [^ >] * >. *? < 1 > / \ | <. *? />
First and last whitespace characters
Can be used to remove whitespace at the beginning and end of a line (including Spaces, tabs, page feeds, and so on)
^ | \ \ s * s * or (^ \ \ s \ *) | (\ \ s \ *)
Chinese characters
China
^[\u4e00-\u9fa5]{0,}$
English and Numbers
^[A-Za-z0-9]+$
The value contains 3 to 20 characters
^. {3, 20} $
The English characters
The value is a string of 26 English letters
^[A-Za-z]+$
A string consisting of 26 uppercase English letters
^[A-Z]+$
The value is a string of 26 lowercase letters
^[a-z]+$
The value is a string of 26 letters and numbers
^[A-Za-z0-9]+$
The value is a string of 26 letters, digits, and underscores
^\w+$
Chinese, English, and digits including underscores (_)
^[\u4E00-\u9FA5A-Za-z0-9_]+$
Chinese characters, English characters, digits but not underscores
^[\u4E00-\u9FA5A-Za-z0-9]+$
Disallow input containing %&’,; =? $” character, etc
[^%&’,;=?$\x22]+
Do not enter characters containing ~
[^~\x22]+
Number of regular
The integer
^ -? [1-9]\d*$
Positive integer
^[1-9]\d*$
Negative integer
^-[1-9]\d*$
Non-negative integer
^[1-9]\d*|0$
A positive integer
^-[1-9]\d*|0$
Floating point Numbers
^ -? ([1-9]\d*\.\d*|0\.\d*[1-9]\d*|0? $\. | 0 + 0)
Are floating point Numbers
^[1-9]\d*\.\d*|0\.\d*[1-9]\d*$
Negative floating point number
^-([1-9]\d*\.\d*|0\.\d*[1-9]\d*)$
Non-negative floating point number
^[1-9]\d*\.\d*|0\.\d*[1-9]\d*|0? \. | 0 0 + $
A non-positive floating point number
^(-([1-9]\d*\.\d*|0\.\d*[1-9]\d*))|0? \. | 0 0 + $