The digital verification of regular expressions set validation numbers: ^ [0-9] * $ verification bit number n: ^ \ d {n} $ verification least n bit digital: ^ \ d {n,} $ verifies the digital bit mn : ^ \ d {m, n } $ verification zero and non-zero number at the beginning: ^ (0 | [1-9] [0-9] *) $ verify that there are two decimal places of a positive real number : ^ [0-9 (. [0-9] {2})?] + $ verification 1-3 decimals positive real numbers : (. [0-9] {1,3})? ^ [0-9] + $ verification non ? positive integer zero: ^ \ + [1-9] [0-9] * $ verification of non-zero -negative integers : ^ \ - [1-9] [0-9] * $ verification of non-negative integers (positive integer + 0) ^ \ d + $ verification non-positive integer ( negative integer + 0) ^ ((- \ d +) | (0 +)) $ verification character of length 3 of: ^ {3} $. verified by the 26 letters of the alphabet string consisting of: ^ [a-Za-z ] + $ authentication string 26 by a capital English letters: ^ [AZ] + $ authentication string 26 by the small letters written consisting of: ^ [az] + $ verification string of numbers and English letters 26: ^ [a-Za-z0-9 ] + $ Verified by the numbers 26 letters or underscore character string consisting of: ^ \ w + $ validate user passwords: ^ [a-zA-Z ] \ w {5,17} $ correct format: beginning with the letter, length 6 -18, it can only contain characters, numbers, and the underscore . Verify ^% & containing '?,; $ = \ "Characters such as: [^% &',; = $ \ x22?] + Verify Character: ^ [\ u4e00- \ u9fa5] , {0,} $ verification Email address:. ^ \ w + [- . +] \ w +) * @ \ w + ([-.] \ w +) * \ \ w + ([-.] \ w +) * $ verification InternetURL: ^ http: // ([ \ w -] + \) + [\ w -] + (/ [\ w-./?%&=]*)?$; ^ [a-zA-z] +:. // (w + (-w + (. (w + (- w +)?) *) *)) * (S *) $? verify the phone number: ^ (\ (\ d { 3,4} \) | \ d {3,4} -)? \ d {7,8} $: - . The correct format is: XXXX-XXXXXXX, XXXX-XXXXXXXX , XXX-XXXXXXX, XXX-XXXXXXXX, XXXXXXX, XXXXXXXX authentication identification number (15 or 18 digits): ^ \ d {15} | \ d { } 18 $ verify year 12 months: ^ (0 [1-9] | 1 [0-2]?) $ correct format: "01" - "09" and " 1 "" 12 " verify 31 days a month: ^ (? (0 [1-9 ]) | ((1 | 2) [0-9]) | 30 | 31) $ format is correct: 01,09 and . 1,31 integer: ^ - \ d + $? non-negative floating-point numbers (positive floating point+ 0): ^ \ d + (.? \ \ D +) $ float . ^ (([0-9] + \ [0-9] * [1-9] [0-9] *) | ([0 -9] * [1-9] [0-9 ] * \ [0-9] +) |. ([0-9] * [1-9] [0-9] *)) $ non-positive floating point number (negative floating point number + 0) ^ ((- \ d + (\ \ d +)) |.?.? (0 + (\ 0 +))) $ negative floating point number ^ (- (([0-9 ] + \ [0-9] * [ 1-9] [0-9] *) |.. ([0-9] * [1-9] [0-9] * \ [0-9] +) | ([0-9] * [1-9] [0-9] *))) $ ?. float ^ (- \ d +) ( \ \ d +)? (\ \ d +.) $? n
Notation meaning:
In addition to matching newline any character other than \ w matching letters or numbers or underscores , or kanji \ s matches any whitespace \ d match numbers \ b matches the beginning or end of a word ^ string matches the start end of the matching string $ [ \ u4e00- \ u9fa5] {2,20} matches characters 2-20 * repeated zero or more times + repeated one or more times ? repeated ZeroOrOne {n} repeated n times {n,} is repeated n times or more {n, m} is repeated m times n to \ W not match any letters, numbers, underscores , kanji character \ S not match any whitespace character \ D matches any non-numeric characters \ B not match at the beginning or end of a word location [^ x] matches any character except x [^ aeiou] matches in addition to these letters aeiou than any character (exp) match exp, and capture the text to automatically name of the group (? < name> exp) match exp, and capture the text to name the name of the group, can also be written ( 'name'exp)? (:? text exp) match exp, does not capture the match, the packet is not assigned to this group number zero-width assertion (? = exp) Matches the previous exp position (? <= exp) matching position behind exp (?! exp) matching position with the back is not of exp (? <! exp) matching position not preceded by exp's comments (? # comment) this type of group does not produce regular expression processing of any influence, to provide comments to read people
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