Collection of common Regular Expressions and Regular Expressions

Collection of common Regular Expressions and Regular Expressions

Collection of common Regular Expressions

1. verification number: Only one numeric expression can be entered ^ \ d $ to describe an example of matching a digit, 0, 1, 2, and 2 that does not match. you can only enter n numeric expressions ^ \ d {n} $ for example ^ \ d {8} $ to describe the example of matching 8 numbers 12345678,22223334, 12344321 does not match 3. you can only enter at least n numeric expressions ^ \ d {n,} $ for example ^ \ d {8,} $ to describe the example of matching at least n numbers 12345678,123456789, 12344321 mismatched Example 4. only m to n numeric expressions can be input ^ \ d {m, n} $ for example, ^ \ d {123456,123} $ describe an example of matching m to n numbers 12345678,1234567 mismatched 4567895. you can only enter a numeric expression ^ [0-9] * $ to describe the example of matching any number: 12345678,1234567 mismatched example E, clear moon 6. you can only enter a range numeric expression ^ [12-15] $ to describe the example of a number matching a range of 12, 13, 14, 15 do not match Example 7. only 0 and non-0 numeric expressions can be entered ^ (0 | [1-9] [0-9] *) $ the description can be 0, and the first number cannot be 0, there can be 0 matching examples of 101,100, not matching example 01, clear moon, http://blog.csdn.net/21aspnet8 . You can only enter the real expression ^ [-+]? \ D + (\. \ d + )? $ Example 18, + 3.14,-9.90 that matches a real number. 6, 33 s, 67-999. only positive real number expressions with n decimal places can be input ^ [0-9] + (. [0-9] {n })? $ With ^ [0-9] + (. [0-9] {2 })? $ For example, an example of a positive number matching n decimal places is described. Example 2.22 Of a non-matching case 2.222,-2.22, http://blog.csdn.net/21aspnet10 . Only the positive number expression ^ [0-9] + (. [0-9] {m, n}) of m-n decimal places can be entered })? $ With ^ [0-9] + (. [0-9] {1, 2 })? $ For example, 2.22 is used to describe an example of positive number matching m to n decimal places, 2.2 is not used as an example of 2.222,-2.2222, http://blog.csdn.net/21aspnet11 . Only positive integer expressions other than 0 can be entered ^ \ +? [1-9] [0-9] * $ example of a positive integer that matches a non-zero value: 234, 0,-4, 12. only a non-0 negative integer expression ^ \-[1-9] [0-9] * $ can be entered to describe an example of a non-0 negative integer match-2,-23, -234 mismatched examples:, 4, 13. only n character expressions can be entered ^. {n} $ to ^. {4} $ is used as an example to describe how to match n characters. Note that Chinese characters are only counted as 1-character matching examples: 1234, 12we, 123 clear. Examples of non-matching clear moon: 0,123,123 www, http://blog.csdn.net/21aspnet/ 14. You can only enter the English character expression ^. [A-Za-z] + $ as an example to describe an example of English character matching, case-insensitive, Asp, WWW, and mismatched example 0,123,123 www, http://blog.csdn.net/21aspnet/ 15. only uppercase English character expressions can be entered ^. [A-Z] + $ as an example to describe the example of matching English uppercase character matching NET, WWW, mismatched example 0,123,123 www, 16. only lowercase English character expressions can be entered ^. [a-z] + $ is used as an example to describe asp that matches uppercase English characters. Examples of csdn do not match 0, NET, WWW, 17. only English characters and numbers can be entered ^. [A-Za-z0-9] + $ example of matching English characters + digit matching example 1Asp, W1W1W, mismatched example 0,123,123, www, http://blog.csdn.net/21aspnet/ 18. only English characters, numbers, and underlines can be entered. For example, 1Asp, WWW, 12,1_w do not match. Example 3 #, 2-4, w # $, http://blog.csdn.net/21aspnet/ 19. password example expression ^. [a-zA-Z] \ w {m, n} $ the following example does not match the m-n characters that match the English character and can only match numbers, letters, or underscores. 20. verify the first letter uppercase expression \ B [^ \ Wa-z0-9 _] [^ \ WA-Z0-9 _] * \ B description the first letter can only uppercase matching example Asp, Net mismatch example http://blog.csdn.net/21aspnet/ 21. Verify the URL (? Id = Chinese). NET2005 does not have this function expression ^ http: \/([\ w-] + (\. [\ w-] +) + (\/[\ w -. \/\? % & = \ U4e00-\ u9fa5] *)? $ Description verification tape? Id = Chinese matching example http://blog.csdn.net/21aspnet/ , Http://blog.csdn.net? Id = example of non-match between qingyue and qingyue 22. Verify the Chinese character expression ^ [\ u4e00-\ u9fa5] {0 ,}$ describes examples of Chinese Character matching only. http://blog.csdn.net/21aspnet/ 23. Verify the QQ number expression [0-9] {5, 9} to describe an example of a matching QQ number of 5-9 characters. Example of 10000 w that does not match 123456, http://blog.csdn.net/21aspnet/ 24. verify the email (verify the same MSN number) expression \ w + ([-+. '] \ w +) * @ \ w + ([-.] \ w + )*\. \ w + ([-.] \ w +) * description note MSN non-hotmail.com mailbox can also be matched examples of aaa@msn.com mismatch example 111 @ 1. http://blog.csdn.net/21aspnet/ 25. verify the ID card number (for rough verification, it is best to tune the class library on the server side for further verification) expression ^ [1-9] ([0-9] {16} | [0-9] {13 }) [xX0-9] $ describe the matching example of a 15 or 18-digit ID card number, supporting an unmatched example with X http://blog.csdn.net/21aspnet/ 26. verify the mobile phone number (including 159, excluding PHS) expression ^ 13 [0-9] {1} [0-9] {8} | ^ 15 [9] {1} [0-9] {8} The description contains 159 example of mobile phone number 130-139 matching 139 XXXXXXXX mismatched example 140 XXXXXXXX, http://blog.csdn.net/21aspnet/ 27. verify the phone number (complex,. NET2005 gave an incorrect expression (not perfect) solution 1 (\ d {3} \) | \ d {3 }-) | (\ d {4} \) | \ d {4 }-))? (\ D {8} | \ d {7}) solution 2 (^ [0-9] {3, 4} \-[0-9] {3, 8} $) | (^ [0-9] {3, 8} $) | (^ \ ([0-9] {3, 4} \) [0-9] {3, 8} $) | (^ 0 {0, 1} 13 [0-9] {9} $) mobile phone number supported but not perfectly described Shanghai: 02112345678 3 + 8 digits Shanghai: 021-12345678 Shanghai :( 021) -12345678 Shanghai :( 021) 12345678 Zhengzhou: 03711234567 4 + 7 digits Hangzhou: 057112345678 4 + 8 digits with extension number, because the status of country code is very complex, we do not recommend that the front-end do 100% verification. So far, no one seems to be able to write a file containing all types. In fact, there are many situations that are in conflict. If anyone who has a better phone number, please leave a message to match the example that does not match. Example 28. verify passport expression (P \ d {7}) | G \ d {8 }) describe the example that verifies the mismatch between the P + 7 numbers and the G + 8 numbers, http://blog.csdn.net/21aspnet/ 29. verify IP expression ^ (25 [0-5] | 2 [0-4] [0-9] | [0-1] {1} [0-9] {2} | [1-9] {1} [0-9] {1} | [1-9]) \. (25 [0-5] | 2 [0-4] [0-9] | [0-1] {1} [0-9] {2} | [1- 9] {1} [0-9] {1} | [1-9] | 0) \. (25 [0-5] | 2 [0-4] [0-9] | [0-1] {1} [0-9] {2} | [1- 9] {1} [0-9] {1} | [1-9] | 0) \. (25 [0-5] | 2 [0-4] [0-9] | [0-1] {1} [0-9] {2} | [1- 9] {1} [0-9] {1} | [0-9]) $ example of verifying IP match 192.168.0.1 222.234.1.4 does not match 30. verify domain expression ^ [a-zA-Z0-9] + ([a-zA-Z0-9 \-\.] + )? \. S |) $ example of verifying domain match csdn.net baidu.com it.com.cn does not match 192.168.0.1 31. Verify the credit card expression ^ ((?: 4 \ d {3}) | (?: 5 [1-5] \ d {2}) | (?: 6011) | (?: 3 [68] \ d {2}) | (?: 30 [012345] \ d) [-]? (\ D {4}) [-]? (\ D {4}) [-]? (\ D {4} | 3 [] \ d {13}) $ example 32 that describes how to verify that the matching examples of Visa, MasterCard, Discover Card, and American Express Card do not match. verify the ISBN international standard number expression ^ (\ d [-] *) {9} [\ dxX] $ example of verifying ISBN international standard number matching 7-111-19947-2 mismatch 33. verify GUID globally unique identifier expression ^ [A-Z0-9] {8}-[A-Z0-9] {4}-[A-Z0-9] {4}-[A-Z0-9] {4}-[A-Z0-9] {12} $ example of matching format 8-4-4-4-12 2064d355-c0b9-41d8-9ef7-9d8b26524751 mismatch 34. verify the file path and extension expression ^ ([a-zA-Z] \: |\\) \ ([^ \] + \) * [^ \/: *? "<> |] + \. Txt (l )? $ Example E: \ mo.txt which does not match the file extension check path and file extension examples E: \, mo.doc, E: \ mo.doc, http://blog.csdn.net/21aspnet/ 35. Verify the Html color value expression ^ #? ([A-f] | [A-F] | [0-9]) {3} ([a-f] | [A-F] | [0-9]) {3 })? $ Example of color value check # example of FF0000 Mismatch http://blog.csdn.net/21aspnet/ ^ [1-9] \ d *\. \ d * | 0 \. \ d * [1-9] \ d * $ integer or decimal number: ^ [0-9] + \. {0, 1} [0-9] {0, 2} $ can only enter numbers: "^ [0-9] * $ ". Only n digits can be entered: "^ \ d {n} $ ". You can only enter at least n digits: "^ \ d {n,} $ ". Only m ~ can be input ~ N-digit :. "^ \ D {m, n }$" only numbers starting with zero and non-zero can be entered: "^ (0 | [1-9] [0-9] *) $ ". Only positive numbers with two decimal places can be entered: "^ [0-9] + (. [0-9] {2 })? $ ". Only 1 ~ Positive number of three decimal places: "^ [0-9] + (. [0-9] {1, 3 })? $ ". Only a non-zero positive integer can be entered: "^ \ +? [1-9] [0-9] * $ ". Only a non-zero negative integer can be entered: "^ \-[1-9] [] 0-9" * $. Only 3 characters can be entered: "^. {3} $ ". You can only enter A string consisting of 26 English letters: "^ [A-Za-z] + $ ". You can only enter a string consisting of 26 uppercase letters: "^ [A-Z] + $ ". You can only enter a string consisting of 26 lower-case English letters: "^ [a-z] + $ ". You can only enter a string consisting of a number and 26 English letters: "^ [A-Za-z0-9] + $ ". You can only enter a string consisting of digits, 26 English letters, or underscores (_): "^ \ w + $ ". Verify the User Password: "^ [a-zA-Z] \ w {5, 17} $". The correct format is: start with a letter, with a length of 6 ~ It can only contain characters, numbers, and underscores. Check whether ^ % & ',; =? $ \ "And other characters:" [^ % & ',; =? $ \ X22] + ". Only Chinese characters can be entered: "^ [\ u4e00-\ u9fa5] {0,} $" verification Email address: "^ \ w + ([-+.] \ w +) * @ \ w + ([-.] \ w + )*\. \ w + ([-.] \ w +) * $ ". Verify InternetURL: "^ http: // ([\ w-] + \.) + [\ w-] + (/[\ w -./? % & =] *)? $ ". Verification phone number: "^ (\ d {3, 4}-) | \ d {3.4 }-)? \ D {7,8} $ "correct format:" XXX-XXXXXXX "," XXXX-XXXXXXXX "," XXX-XXXXXXX "," XXX-XXXXXXXX "," XXXXXXX "and" XXXXXXXX ". Verify the ID card number (15 or 18 digits): "^ \ d {15} | \ d {18} $ ". 12 months of verification: "^ (0? [1-9] | 1 [0-2]) $ "the correct format is:" 01 "~ "09" and "1 "~ "12 ". 31 days of verification for a month: "^ (0? [1-9]) | (1 | 2) [0-9]) | 30 | 31) $ "the correct format is;" 01 "~ "09" and "1 "~ "31 ". Regular Expression matching Chinese characters: [\ u4e00-\ u9fa5] matching double-byte characters (including Chinese characters): [^ \ x00-\ xff] application: calculate the length of a String (two-byte length Meter 2, ASCII character meter 1) String. prototype. len = function () {return this. replace (/[^ \ x00-\ xff]/g, "aa "). length;} match the regular expression of the blank line: \ n [\ s |] * \ r match the regular expression of the html Tag: <(. *)> (. *) <\/(. *)> | <(. *) \/> Regular Expression matching spaces at the beginning and end: (^ \ s *) | (\ s * $) Application: javascript does not contain trim functions like vbscript, we can use this expression as follows: String. prototype. trim = function () {return this. replace (/(^ \ s *) | (\ s * $)/g, "");} Use a regular expression to break down and convert ip addresses: Below is a Javascript program that uses a regular expression to match ip addresses and convert ip addresses to corresponding values: function IP2V (ip) {re =/(\ d + )\. (\ d + )\. (\ d + )\. (\ d +)/g // The regular expression that matches the IP address if (re. test (ip) {return RegExp. $1 * Math. pow (255, 3) + RegExp. $2 * Math. pow (255, 2) + RegExp. $3*255 + RegExp. $4*1} else {throw new Error ("Not a valid IP address! ")} However, if the above program does not use regular expressions, it may be simpler to use the split function directly. The program is as follows: var ip =" 10.100.0000168 "ip = ip. split (". ") alert (" the IP value is: "+ (ip [0] * 255*255*255 + ip [1] * 255*255 + ip [2] * 255 + ip [3] * 1 )) the regular expression matching the Email address: \ w + ([-+.] \ w +) * @ \ w + ([-.] \ w + )*\. \ w + ([-.] \ w +) * Regular Expression matching the URL: http: // ([\ w-] + \.) + [\ w-] + (/[\ w -. /? % & =] *)? Use regular expressions to restrict text box input in a webpage form: use regular expressions to restrict only Chinese characters: onkeyup = "value = value. replace (/[^ \ u4E00-\ u9FA5]/g, '')" onbeforepaste = "clipboardData. setData ('text', clipboardData. getData ('text '). replace (/[^ \ u4E00-\ u9FA5]/g, '')" use a regular expression to limit that only full-width characters can be entered: onkeyup = "value = value. replace (/[^ \ uFF00-\ uFFFF]/g, '')" onbeforepaste = "clipboardData. setData ('text', clipboardData. getData ('text '). replace (/[^ \ uFF00-\ uFFFF]/g, '')" use a regular expression to limit the number to onke. Yup = "value = value. replace (/[^ \ d]/g, '')" onbeforepaste = "clipboardData. setData ('text', clipboardData. getData ('text '). replace (/[^ \ d]/g, '')" You can only enter numbers and English letters using regular expressions: onkeyup = "value = value. replace (/[\ W]/g, '')" onbeforepaste = "clipboardData. setData ('text', clipboardData. getData ('text '). replace (/[^ \ d]/g, '')" <input onkeyup = "value = value. replace (/[^ \ u4E00-\ u9FA5 \ w]/g, '')" onbeforepaste = "clipboardData. setData ('text', cl IpboardData. getData ('text '). replace (/[^ \ u4E00-\ u9FA5 \ w]/g, '')" value = "underline allowed, "> <script language =" javascript "> if (document. layers) // trigger the keyboard event document. captureEvents (Event. KEYPRESS) function xz (thsv, nob) {if (nob = "2") {window. clipboardData. setData ("text", "") alert ("avoid illegal character input, do not copy character"); return false;} if (event. keyCode! = 8 & event. keyCode! = 16 & event. keyCode! = 37 & event. keyCode! = 38 & event. keyCode! = 39 & event. keyCode! = 40) {thsvv = thsv. value; // The input value thsvs = thsvv. substring (thsvv. length-1); // enter the last character // thsvss = thsvv. substring (0, thsvv. length-1); // remove the last error character if (! Thsvs. replace (/[^ \ u4E00-\ u9FA5 \ w]/g, '') | event. keyCode = 189) {// remove the symbol and underline key thsv from the regular expression. value = 'do not enter invalid symbols [' + thsvs + ']'; alert ('do not enter invalid symbols [' + thsvs + ']'); thsv. value = ""; return false ;}}</script> <input onkeyup = "xz (this, 1)" onPaste = "xz (this, 2) "value =" "> allow numbers, letters, and Chinese characters <script language =" javascript "> <! -- Function MaxLength (field, maxlimit) {var j = field. value. replace (/[^ \ x00-\ xff]/g ,"**"). length; // alert (j); var tempString = field. value; var tt = ""; if (j> maxlimit) {for (var I = 0; I <maxlimit; I ++) {if (tt. replace (/[^ \ x00-\ xff]/g ,"**"). length <maxlimit) tt = tempString. substr (0, I + 1); else break;} if (tt. replace (/[^ \ x00-\ xff]/g ,"**"). length> maxlimit) tt = tt. substr (0, tt. length-1); field. value = tt;} els E {;}</script> single-line text box Control <br/> <INPUT type = "text" id = "Text1" name = "Text1" onpropertychange = "MaxLength (this, 5) "> <br/> multi-line text box control: <br/> <TEXTAREA rows = "14" cols = "39" id = "Textarea1" name = "Textarea1" onpropertychange = "MaxLength (this, 15) "> </TEXTAREA> <br/> You can only enter numbers and Chinese characters in the control form .... <script> function test () {if (document. a. b. value. length> 50) {alert ("cannot exceed 50 characters! "); Document. a. b. focus (); return false ;}}</script> <form name = a onsubmit = "return test () "> <textarea name =" B "cols =" 40 "wrap =" VIRTUAL "rows =" 6 "> </textarea> <input type =" submit "name =" Submit "value =" check "> </form> can only be Chinese characters <input onkeyup =" value = value. replace (/[^ \ u4E00-\ u9FA5]/g, '')"> only English characters <script language = javascript> function onlyEng () {if (! (Event. keyCode> = 65 & event. keyCode <= 90) event. returnValue = false ;}</script> <input onkeydown = "onlyEng (); "> <input name =" coname "type =" text "size =" 50 "maxlength =" 35 "class = input2 onkeyup =" value = value. replace (/[\ W]/g, '')" onbeforepaste = "clipboardData. setData ('text', clipboardData. getData ('text '). replace (/[^ \ d]/g, '')"> only numbers <script language = javascript> function onlyNum () {if (! (Event. keyCode> = 48 & event. keyCode <= 57) | (event. keyCode> = 96 & event. keyCode <= 105) // consider the number key event on the keypad. returnValue = false ;}</script> <input onkeydown = "onlyNum ();"> only English characters and numbers <input onkeyup = "value = value. replace (/[\ W]/g, '')" onbeforepaste = "clipboardData. setData ('text', clipboardData. getData ('text '). replace (/[^ \ d]/g, '')"> verify the email format as <script language = Javascript RUNAT = Server> function isEmail (strEmail) {If (strEmail. search (/^ \ w + (-\ w +) | (\. \ w +) * \ @ [A-Za-z0-9] + ((\. |-) [A-Za-z0-9] + )*\. [A-Za-z0-9] + $ /)! =-1) return true; else alert ("oh") ;}</SCRIPT> <input type = text onblur = isEmail (this. value)> shielded keywords (sex, fuck)-modified <script language = "JavaScript1.2"> function test () {if (. b. value. indexOf ("sex") = 0) | (. b. value. indexOf ("fuck") = 0) {alert ("five lectures, four beautiful three loves");. b. focus (); return false ;}}</script> <form name = a onsubmit = "return test () "> <input type = text name = B> <input type =" submit "name =" Submit "v Alue = "check"> </form>: only numbers <input onkeyup = "if (event. keyCode! = 37 & event. keyCode! = 39) value = value. replace (/\ D/g, '');" onbeforepaste = "clipboardData. setData ('text', clipboardData. getData ('text '). replace (/\ D/g, '')"> mobile phone number :( ^ (\ d {3, 4 }-)? \ D {7, 8}) $ | (13 [0-9] {9}) | (15 [8-9] {9 }) no, you can write it according to the above description. It just takes some time. Verify the number's regular expression set verification number: ^ [0-9] * $ verify the n-digit number: ^ \ d {n} $ verify the number of at least n digits: ^ \ d {n ,}$ verify the m-n digit: ^ \ d {m, n }$ verify the number starting with zero or zero: ^ (0 | [1-9] [0-9] *) $ verify the positive number of two decimal places: ^ [0-9] + (. [0-9] {2 })? $ Verify the positive number of 1-3 decimal places: ^ [0-9] + (. [0-9] {1, 3 })? $ Verify a non-zero positive integer: ^ \ +? [1-9] [0-9] * $ verify a non-zero negative integer: ^ \-[1-9] [0-9] * $ verify a non-negative integer (positive integer + 0) ^ \ d + $ verify a non-positive integer (negative integer + 0) ^ (-\ d +) | (0 +) $ verify a 3-character length: ^. {3} $ verify A string consisting of 26 English letters: ^ [A-Za-z] + $ verify A string consisting of 26 uppercase English letters: ^ [A-Z] + $ verify a string consisting of 26 lower-case English letters: ^ [a-z] + $ verify a string consisting of digits and 26 English letters: ^ [A-Za-z0-9] + $ verify a string consisting of digits, 26 letters, or underscores: ^ \ w + $ verify user password: ^ [a-zA-Z] \ w {5, 17} $ the correct format is: it must start with a letter and be between 6 and 18 characters. It can only contain characters, numbers, and underscores. Check whether ^ % & ',; =? $ \ "And other characters: [^ % & ',; =? $ \ X22] + verify Chinese characters: ^ [\ u4e00-\ u9fa5], {0,} $ verify Email address: ^ \ w + [-+.] \ w +) * @ \ w + ([-.] \ w + )*\. \ w + ([-.] \ w +) * $ verify InternetURL: ^ http: // ([\ w-] + \.) + [\ w-] + (/[\ w -. /? % & =] *)? $; ^ [A-zA-z] +: // (w + (-w +) *) (. (w + (-w + )*))*(? S *)? $ Verification 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. Verify ID card number (15 or 18 digits): ^ \ d {15} | \ d {} 18 $ verify 12 months of a year: ^ (0? [1-9] | 1 [0-2]) $ the correct format is: "01"-"09" and "1" "12" to verify the 31 days of a month: ^ (0? [1-9]) | (1 | 2) [0-9]) | 30 | 31) $ the correct format is: 01, 09, 1, 31. Integer: ^ -? \ D + $ non-negative floating point number (Positive floating point number + 0): ^ \ d + (\. \ d + )? $ Positive floating point ^ ([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] *) $ floating point number ^ (-? \ D +) (\. \ d + )?

The above is a common Regular Expression summarized in this article. I hope it will be helpful for you to learn regular expressions.