The regular expression Daquan

First, the expression of verifying numbers

Number: ^[0-9]*$
N digits: ^\d{n}$
at least n digits: ^\d{n,}$
m-n digits: ^\d{m,n}$
0 and non 0 digits: ^ (0|[ 1-9][0-9]*) $
A number with a maximum of two decimal places that starts with a non 0: ^ ([1-9][0-9]*) + (. [ 0-9]{1,2})? $
Positive or negative numbers with 1-2 decimal places: ^ (\-)? \d+ (\.\d{1,2})? $
Positive, negative, and decimal: ^ (\-|\+)? \d+ (\.\d+)? $
has a positive real number of two decimal places: ^[0-9]+ (. [ 0-9]{2})? $
has a positive real number of decimal places: ^[0-9]+ (. [ 0-9]{1,3})? $
Non-zero positive integer: ^[1-9]\d*$ or ^ ([1-9][0-9]*) {1,3}$ or ^\+?[ 1-9][0-9]*$
Nonzero negative integer: ^\-[1-9][]0-9″*$ or ^-[1-9]\d*$
non-negative integer: ^\d+$ or ^[1-9]\d*|0$
non-positive integer: ^-[1-9]\d*|0$ or ^ ((-\d+) | ( 0+) $
Non-negative floating-point number: ^\d+ (\.\d+)? $ or ^[1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0$
non-positive floating-point number: ^ ((-\d+ (\.\d+)?) | (0+ (\.0+)?)) $ or ^ (-([1-9]\d*\.\d*|0\.\d*[1-9]\d*)) |0?\.0+|0$
Positive 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]*)) $
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]*))) $
Floating-point number: ^ (-?\d+) (\.\d+)? $ or ^-? ([1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0) $
Two, an expression that verifies the character

Kanji: ^[\u4e00-\u9fa5]{0,}$
English and numeric: ^[a-za-z0-9]+$ or ^[a-za-z0-9]{4,40}$
All characters of length 3-20: ^.{ 3,20}$
A string of 26 English letters: ^[a-za-z]+$
A string of 26 uppercase English letters: ^[a-z]+$
A string of 26 lowercase English letters: ^[a-z]+$
A string consisting of a number and 26 English letters: ^[a-za-z0-9]+$
A string of numbers, 26 letters, or underscores: ^\w+$ or ^\w{3,20}$
Chinese, English, and numerals include underscores: ^[\u4e00-\ u9fa5a-za-z0-9_]+$
Chinese, English, numeric but not underlined symbols: ^[\u4e00-\u9fa5a-za-z0-9]+$ or ^[\u4e00-\u9fa5a-za-z0-9]{2,20}$
You can enter a character:[^%& ' that contains ^%& ',; =?$\ ', =?$\x22]+
prohibit input of characters containing ~: [^~\x22]+
Iii. Special needs expression

Email Address: ^\w+ ([-+.] \w+) *@\w+ ([-.] \w+) *\.\w+ ([-.] \w+) *$
Domain name: [a-za-z0-9][-a-za-z0-9]{0,62} (/.[ A-ZA-Z0-9][-A-ZA-Z0-9]{0,62}) +/.?
interneturl:[a-za-z]+://[^\s]* or ^http://([\w-]+\.) +[\w-]+ (/[\w-./?%&=]*)? $
Mobile 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}$
Phone numbers ("Xxx-xxxxxxx", "xxxx-xxxxxxxx", "xxx-xxxxxxx", "xxx-xxxxxxxx", "XXXXXXX", and "XXXXXXXX"): ^ ($$\d{3,4}-) |\d{3.4}-)? d{7,8}$
Domestic phone number (0511-4405222, 021-87888822): \d{3}-\d{8}|\d{4}-\d{7}
Social Security Number (15-bit, 18-digit number): ^\d{15}|\d{18}$
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}?$
Whether the account is legal (the letter starts with 5-16 bytes allowed, alphanumeric underline): ^[a-za-z][a-za-z0-9_]{4,15}$
Password (beginning with letter, length between 6~18, can only contain letters, numbers, and underscores): ^[a-za-z]\w{5,17}$
Strong password (must contain a combination of uppercase and lowercase letters and numbers, cannot use special characters, length between 8-10): ^ (? =.*\d) (? =.*[a-z]) (? =.*[a-z]). {8,10}$
Date format: ^\d{4}-\d{1,2}-\d{1,2}
12 months of the year (01~09 and 1~12): ^ (0?[ 1-9]|1[0-2]) $
One months of 31 days (01~09 and 1~31): ^ (0?[ 1-9]) | ((1|2) [0-9]) |30|31) $

The regular expression Daquan