65 most common regular expressions all you need is here. _ Regular Expressions

A lot of people do not know regular friends, in the face of the need to use the regular calibration data, often on the internet to find a long time, the results are still not very satisfied with the requirements. So I've recently sorted out some of the regular expressions commonly used in development and shared them here. Leave a bottom for yourself, also give friends a reference.

One, the expression of the checksum number

1 Number: ^[0-9]*$

2 N digits: ^\d{n}$

3 digits of at least n digits: ^\d{n,}$

4 m-n digits: ^\d{m,n}$

Numbers beginning with 50 and not 0: ^ (0|[ 1-9][0-9]*) $

6 non-0 digits with a maximum of two decimal digits: ^ ([1-9][0-9]*) + (. [ 0-9]{1,2})? $

7 positive or negative numbers with 1-2 decimal places: ^ (\-) \d+ (\.\d{1,2})? $

8 positive, negative, and decimal: ^ (\-|\+) \d+ (\.\d+)? $

9 positive real numbers with two decimal places: ^[0-9]+ (. [ 0-9]{2})? $

10 positive real numbers with 1~3 decimal places: ^[0-9]+ (. [ 0-9]{1,3})? $

11 Nonzero positive integers: ^[1-9]\d*$ or ^ ([1-9][0-9]*) {1,3}$ or ^\+? [1-9] [0-9]*$

12 Non-zero Integer: ^\-[1-9][]0-9 "*$ or ^-[1-9]\d*$

13 non-negative integers: ^\d+$ or ^[1-9]\d*|0$

14 Non-positive integers: ^-[1-9]\d*|0$ or ^ (-\d+) | ( 0+)) $

15 non-negative floating-point number: ^\d+ (\.\d+)? $ or ^[1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0$

16 Non-positive floating-point number: ^ (-\d+ (\.\d+)?) | (0+ (\.0+)) $ or ^ (-([1-9]\d*\.\d*|0\.\d*[1-9]\d*)) |0?\.0+|0$

17 Positive floating-point numbers: ^[1-9]\d*\.\d*|0\.\d*[1-9]\d*$ or ^ ([0-9]+\.[ 0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\. [0-9]+) | ([0-9]*[1-9][0-9]*)] $

18 Negative floating-point number: ^-([1-9]\d*\.\d*|0\.\d*[1-9]\d*) $ or ^ (-([0-9]+\.[ 0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\. [0-9]+) | ([0-9]*[1-9][0-9]*))] $

19 Floating-point numbers: ^ (-?\d+) (\.\d+)? $ or ^-? ([1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0) $

Second, the expression of the checksum character

1 Chinese characters: ^[\u4e00-\u9fa5]{0,}$

2 English and digital: ^[a-za-z0-9]+$ or ^[a-za-z0-9]{4,40}$

3 All characters of length 3-20: ^. {3,20}$

4 string consisting of 26 English letters: ^[a-za-z]+$

5 A string of 26 uppercase letters: ^[a-z]+$

6 string consisting of 26 lowercase English letters: ^[a-z]+$

7 A string consisting of numbers and 26 English letters: ^[a-za-z0-9]+$

8 A string consisting of numbers, 26 English letters, or underscores: ^\w+$ or ^\w{3,20}$

9 Chinese, English, digital include underline: ^[\u4e00-\u9fa5a-za-z0-9_]+$

10 Chinese, English, digital but excluding underline and other symbols: ^[\u4e00-\u9fa5a-za-z0-9]+$ or ^[\u4e00-\u9fa5a-za-z0-9]{2,20}$

11 can be entered containing ^%& ',; =?$\ ' and other characters:[^%& ', =?$\x22]+

12 prohibit the importation of characters containing ~: [^~\x22]+

Third, the special needs of expression

1 Email Address: ^\w+ ([-+.] \w+) *@\w+ ([-.] \w+) *\.\w+ ([-.] \w+) *$

2 Domain name: [a-za-z0-9][-a-za-z0-9]{0,62} (/.[ A-ZA-Z0-9][-A-ZA-Z0-9]{0,62}) +/.?

3 interneturl:[a-za-z]+://[^\s]* or ^http://([\w-]+\.) +[\w-]+ (/[\w-./?%&=]*)? $

4 Mobile phone Number: ^ (13[0-9]|14[5|7]|15[0|1|2|3|5|6|7|8| 9]|18[0|1|2|3|5|6|7|8| 9]) \d{8}$

5 Telephone numbers ("Xxx-xxxxxxx", "xxxx-xxxxxxxx", "xxx-xxxxxxx", "xxx-xxxxxxxx", "XXXXXXX" and "XXXXXXXX"): ^ (\d{3,4}-) |\d{3.4}-)? \d{7,8}$

6 Domestic telephone number (0511-4405222, 021-87888822): \d{3}-\d{8}|\d{4}-\d{7}

7 ID Number (15-digit, 18-digit): ^\d{15}|\d{18}$

8 Short ID Number (number, letter X end): ^ ([0-9]) {7,18} (x| X)? $ or ^\d{8,18}| [0-9x] {8,18}| [0-9x] {8,18}?$

9 Account number is legal (beginning of letter, allow 5-16 bytes, allow alphanumeric underline): ^[a-za-z][a-za-z0-9_]{4,15}$

10 password (beginning with letter, length between 6~18, can only contain letters, numbers, and underscores): ^[a-za-z]\w{5,17}$

11 Strong password (must contain combination of uppercase and lowercase letters and numbers, cannot use special characters, length between 8-10): ^ (? =.*\d) (? =.*[a-z]) (? =.*[a-z]). {8,10}$

12th format: ^\d{4}-\d{1,2}-\d{1,2}

131-Year 12 months (01~09 and 1~12): ^ (0?[ 1-9]|1[0-2]) $

141 months of 31 days (01~09 and 1~31): ^ (0?[ 1-9]) | ((1|2) [0-9]) |30|31) $

15 of the Money input format:

16 1. There are four forms of money that we can accept: "10000.00" and "10,000.00", and "10000" and "10,000" without "points": ^[1-9][0-9]*$

17 2. This represents any number that does not begin with 0, but it also means that a character "0" does not pass, so we take the following form: ^ (0|[ 1-9][0-9]*) $

18 3. A 0 or a number that does not begin with 0. We can also allow a minus sign at the beginning: ^ (0|-?[ 1-9][0-9]*) $

19 4. This represents a 0 or a number that may be negative at the beginning of not 0. Let the user start with 0. The minus sign is also removed, because the money can not be negative. What we're going to add here is a description of possible decimal parts: ^[0-9]+ (. [ 0-9]+)? $

20 5. It must be stated that there should be at least 1 digits after the decimal point, so "10." is not passed, but "10" and "10.2" are passed: ^[0-9]+ (. [ 0-9]{2})? $

21 6. So we have to specify that after the decimal point must have two, if you think too harsh, you can: ^[0-9]+ (. [ 0-9]{1,2})? $

22 7. This allows the user to write only one decimal place. Let's consider the comma in the number below: ^[0-9]{1,3} (, [0-9]{3}) * (. [ 0-9]{1,2})? $

23 8.1 to 3 digits, followed by any comma + 3 digits, the comma becomes optional, not necessarily: ^ ([0-9]+|[ 0-9]{1,3} (, [0-9]{3}) *) (. [ 0-9]{1,2})? $

24 Note: This is the end result, do not forget that "+" can be replaced with "*" If you think the empty string can also be accepted (strange, why?) Finally, don't forget to use the function to remove the backslash, the general error is here

XML file: ^ ([a-za-z]+-?) +[a-za-z0-9]+\\. [x| x][m| m][l| l]$

26 Regular expression of Chinese character: [\u4e00-\u9fa5]

27 Double-byte characters: [^\x00-\xff] (including Chinese characters, which can be used to compute the length of a string (a two-byte character-length meter 2,ascii character count 1))

28 Regular Expressions for blank lines: \n\s*\r (can be used to delete blank lines)

The regular expression:< for HTML tags (\s*?) [^>]*>.*?</\1>|<.*? /> (online version is too bad, this can only be part of the complex nested tags still powerless)

30 regular expressions of the first-end whitespace characters: ^\s*|\s*$ or (^\s*) | (\s*$) (can be used to delete whitespace characters (including spaces, tabs, page breaks, and so on) at the end of the line, very useful expressions)

31 Tencent QQ Number: [1-9][0-9]{4,} (Tencent QQ number starts from 10000)

32 China ZIP Code: [1-9]\d{5} (?! \d) (China postal Code is 6 digits)

IP address: \d+\.\d+\.\d+\.\d+ (useful when extracting IP addresses)

IP address: (?:(? : 25[0-5]|2[0-4]\\d| [01]?\\d?\\d) \.) {3} (?: 25[0-5]|2[0-4]\\d| [01]?\\d?\\d)]

The 65 most commonly used regular expressions you want are here, hurry up and collect them.