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explainregular expression
Website (URL)[a-zA-z]+://[^\s]*
IP Address((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)
Email address\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
QQ number[1-9]\d{4,}
HTML markup (including content or self-closing)<(.*)(.*)>.*<\/\1>|<(.*) \/>
Password (consists of numbers/uppercase letters/lowercase letters/punctuation marks, all four must be available, more than 8 digits)(?=^.{8,}$)(?=.*\d)(?=.*\W+)(?=.*[A-Z])(?=.*[a-z])(?!.*\n).*$
Date (year-month-day)(\d{4}|\d{2})-((1[0-2])|(0?[1-9]))-(([12][0-9])|(3[01])|(0?[1-9]))
Date (Month/Day/Year)((1[0-2])|(0?[1-9]))/(([12][0-9])|(3[01])|(0?[1-9]))/(\d{4}|\d{2})
Time (hour: minutes, 24-hour clock)((1|0?)[0-9]|2[0-3]):([0-5][0-9])
Chinese (character)[\u4e00-\u9fa5]
Chinese and full-width punctuation marks (characters)[\u3000-\u301e\ufe10-\ufe19\ufe30-\ufe44\ufe50-\ufe6b\uff01-\uffee]
Chinese mainland fixed telephone number(\d{4}-|\d{3}-)?(\d{8}|\d{7})
Chinese mainland mobile phone number1\d{10}
Chinese mainland zip code[1-9]\d{5}
Chinese mainland ID number (15 or 18 digits)\d{15}(\d\d[0-9xX])?
Non-negative integer (positive integer or zero)\d+
positive integer[0-9]*[1-9][0-9]*
negative integer-[0-9]*[1-9][0-9]*
integer-?\d+
decimal(-?\d+)(\.\d+)?
Words that do not contain abc\b((?!abc)\w)+\b
explainregular expression
user name/^[a-z0-9_-]{3,16}$/
password/^[a-z0-9_-]{6,18}$/
hexadecimal value/^#?([a-f0-9]{6}|[a-f0-9]{3})$/
E-mail address/^([a-z0-9_\.-]+)@([\da-z\.-]+)\.([a-z\.]{2,6})$/
URL/^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/
IP Address/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/
HTML tag/^<([a-z]+)([^<]+)*(?:>(.*)<\/\1>|\s+\/>)$/
Range of Chinese characters in Unicode encoding/^[u4e00-u9fa5],{0,}$/
Regular expressions that match Chinese characters[\u4e00-\u9fa5]
Comment: Matching Chinese is really a headache. With this expression, it's easy to handle
Match double-byte characters (including Chinese characters)[^\x00-\xff]
Comment: Can be used to calculate the length of a string (2 for a double-byte character, 1 for ASCII characters)
Regular expression that matches blank lines\n\s*\r
Notes: Can be used to delete blank lines
Regular expressions that match HTML tags<(\S*?)[^>]*>.*?</\1>|<.*?/>
Comment: The version circulating on the Internet is too bad. The above version can only match part of it, and it is still powerless for complex nested tags.
Regular expression that matches first and last whitespace characters^\s*|\s*$
Comment: Can be used to remove whitespace characters at the beginning and end of a line (including spaces, tabs, page breaks, etc.), a very useful expression.
Regular expression for matching email addresses\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
Notes: Useful for form validation
Regular Expression Matching URL[a-zA-z]+://[^\s]*
Comment: The version circulating on the Internet has very limited functions, and the above can basically meet the needs.
Match whether the account is legal (start with a letter, allow 5-16 bytes, allow alphanumeric underscores)^[a-zA-Z][a-zA-Z0-9_]{4,15}$
Notes: Useful for form validation
Match domestic phone numbers\d{3}-\d{8}|\d{4}-\d{7}
Comment: Matching forms such as 0511-4405222 or 021-87888822
Match Tencent QQ number[1-9][0-9]{4,}
Comment: Tencent QQ number starts from 10000
Match Chinese mainland zip code[1-9]\d{5}(?!\d)
Comment: Chinese mainland postal code is 6 digits
Match ID\d{15}|\d{18}
Note: Chinese mainland ID card is 15 or 18 digits
Match IP address\d+\.\d+\.\d+\.\d+
Notes: Useful when extracting IP addresses
Match specific numbers:
^[1-9]\d*$//match positive integer
^-[1-9]\d*$//match negative integer
^-?[1-9]\d*$//match integer
^[1-9]\d*|0$Match non-negative integers (positive integers + 0)
^-[1-9]\d*|0$Match non-positive integers (negative integers + 0)
^[1-9]\d*\.\d*|0\.\d*[1-9]\d*$//Match positive floating-point numbers
^-([1-9]\d*\.\d*|0\.\d*[1-9]\d*)$//match negative floating-point numbers
^-?([1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0)$//match floating-point numbers
^[1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0$Match non-negative floating-point numbers (positive floating-point numbers + 0)
^(-([1-9]\d*\.\d*|0\.\d*[1-9]\d*))|0?\.0+|0$Match non-positive floating-point numbers (negative floating-point numbers + 0)
Notes: Useful when dealing with large amounts of data, pay attention to corrections in specific applications.
Match specific strings
^[A-Za-z]+$//Match a string of 26 English letters
^[A-Z]+$//Matches a string of 26 English letters
^[a-z]+$//Matches a string of 26 lowercase letters
^[A-Za-z0-9]+$//Match a string of numbers and 26 letters
^\w+$//Matches a string consisting of numbers, 26 letters, or underscores
characterdescribe
\Marks the next character as a special character, or a literal character, or a backward reference, or an octal escape character. For example, "n" matches the character "n". " n" matches a newline character. The sequence "\" matches "" and " (" matches " (").
^Matches the starting position of the input string. If the Multiline property of the RegExp object is set, ^ also matches the position after " n" or " r".
$Matches the end position of the input string. If the RegExp object's Multiline property is set, $ also matches the position before "\n" or "\r".
*Matches the preceding subexpression zero or more times. For example, zo * can match "z" and "zoo". * is equivalent to {0,}.
+Matches the preceding subexpression one or more times. For example, "zo +" matches "zo" and "zoo", but not "z". + is equivalent to {1,}.
?Matches the preceding subexpression zero or once. For example, "do (es)?" can match "do" in "do" or "does".? is equivalent to {0,1}.
{n}n is a non-negative integer. Matches certain n times. For example, "o {2}" does not match the "o" in "Bob", but it does match two o's in "food".
{n,}n is a non-negative integer. Matches at least n times. For example, "o {2,}" does not match "o" in "Bob", but does match all o in "foooood". "o {1,}" is equivalent to "o +". "o {0,}" is equivalent to "o *".
{n,m}m and n are both non-negative integers, where n < = m. Match at least n times and at most m times. For example, "o {1,3}" will match the first three o's in "fooooood". "o {0,1}" is equivalent to "o?". Note that there can be no spaces between commas and two numbers.
?When the character immediately follows any other constraint(*,+,?，{n}，{n,}，{n,m}),the matching pattern is non greedy. The non greedy mode matches the searched string as little as possible, while the default greedy mode matches the searched string as much as possible.For example, for string "oooo", "o +?" will match a single "o", and "o +" will match all "o".
.Matches any single character except " n". To match any character including " n", use a pattern like "[.n]".
(pattern)Matches the pattern and gets the match. The obtained match can be obtained from the resulting Matches collection, using the SubMatches collection in VBScript and the 0 dollars... 9 dollars attribute in JScript. To match parenthesis characters, use " (" or ") ".
(?:pattern)Matches a pattern but does not obtain a match result, that is, it is a non-fetching match and is not stored for later use. This is useful when using the or character " (|) " to combine parts of a pattern. For example, "industr (?: y | ies) " is a shorter expression than "industry | industries".
(?=pattern)Forward lookup matches the lookup string at the beginning of any string that matches the pattern. This is a non-fetch match, that is, the match does not need to be fetched for later use. For example, "Windows (? = 95 | 98 | NT | 2000) " matches "Windows" in "Windows2000", but not "Windows" in "Windows3.1". A lookup does not consume characters, that is, after a match occurs, the search for the next match starts immediately after the last match, rather than after the character containing the lookup.
(?!pattern)Negative lookup matches the lookup string at the beginning of any string that does not match the pattern. This is a non-fetch match, that is, the match does not need to be fetched for later use. For example, "Windows (?! 95 | 98 | NT | 2000) " matches "Windows" in "Windows3.1", but not "Windows" in "Windows2000". A lookup does not consume characters, that is, after a match occurs, the search for the next match starts immediately after the last match, rather than after the character containing the lookup.
x|yMatches x or y. For example, "z | food" matches "z" or "food". " (z | f) ood" matches "zood" or "food".
[xyz]Character set. Matches any character contained. For example, "[abc]" matches "a" in "plain".
[^xyz]Set of negative characters. Matches any character not contained. For example, "[^ abc]" matches "p" in "plain".
[a-z]Character range. Matches any character in the specified range. For example, "[a-z]" can match any lowercase character in the range "a" to "z".
[^a-z]Negative character range. Matches any character not in the specified range. For example, "[^ a-z]" can match any character not in the range "a" to "z".
\bMatches a word boundary, which refers to the position between the word and the space. For example, "er b" can match "er" in "never", but not "er" in "verb".
\BMatches non-word boundaries. "er B" matches "er" in "verb", but not "er" in "never".
\cxMatches the control character specified by x. For example, cM matches a Control-M or carriage return. The value of x must be either A-Z or a-z. Otherwise, c is treated as a literal "c" character.
\dMatches a numeric character. Equivalent to [0-9].
\DMatches a non-numeric character. Equivalent to [^ 0-9].
\fMatches a page feed character. Equivalent to \x0c and \cL.
\nMatches a newline character. Equivalent to \x0a and \cJ.
\rMatches a carriage return. Equivalent to \x0d and \cM.
\sMatches any whitespace character, including spaces, tabs, page feeds, etc. Equivalent to [\f\n\r\t\v].
\SMatches any non-whitespace character. Equivalent to [^\f\n\r\t\v].
\tMatches a tab. Equivalent to \x09 and \cI.
\vMatches a vertical tab. Equivalent to \x0b and \cK.
\wMatches any word character that includes an underscore. Equivalent to "[A-Za-z0-9_]".
\WMatches any non-word character. Equivalent to "[^ A-Za-z0-9_]".
\xnMatches n, where n is the hexadecimal escape value. The hexadecimal escape value must be the length of the identified two numbers. For example, " \x41" matches "A". " \x041" is equivalent to " \x04 & 1". ASCII encoding can be used in regular expressions..
\numMatches num, where num is a positive integer. A reference to the match obtained. For example, " (.) 1" matches two consecutive identical characters.
\nIdentifies an octal escaped value or a backwards reference. If \n is preceded by at least n acquired subexpressions, then n is a backwards reference. Otherwise, if n is an octal number (0-7), then n is an octal escaped value.
\nmIdentifies an octal escape value or a backwards reference. Nm is a backwards reference if nm is preceded by at least nm acquirer expressions. If \nm is preceded by at least n acquirers, then n is a backwards reference followed by the literal m. If neither of the preceding conditions is met, if both n and m are octal digits (0-7), then nm will match the octal escape value nm.
\nmlIf n is an octal digit (0-3), and both m and l are octal digits (0-7), the octal escape value nml is matched.
\unMatch n, where n is a Unicode character represented by four hexadecimal digits. For example, \ u00A9 matches the copyright symbol (©).
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