# Regular Expression set for verifying numbers

Source: Internet
Author: User

Verification number: ^ [0-9] * \$
Verify the n-digit number: ^ \ D {n} \$
Verify at least N digits: ^ \ D {n,} \$
Verify M-N digits: ^ \ 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 non-negative integer (positive integer + 0) ^ \ D + \$
Verify non-positive integer (negative integer + 0) ^ (-\ D +) | (0 +) \$
3 characters for verification: ^. {3} \$
Verify a string consisting of 26 English letters: ^ [A-Za-Z] + \$
Verify a string consisting of 26 uppercase letters: ^ [A-Z] + \$
Verify a string consisting of 26 lower-case letters: ^ [A-Z] + \$
Verify a string consisting of digits and 26 English letters: ^ [A-Za-z0-9] + \$
Verify a string consisting of digits, 26 English 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 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, 1, 31.
Integer: ^ -? \ D + \$
Non-negative floating point number (Positive floating point number + 0): ^ \ D + (\. \ D + )? \$
Positive 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] *) \$
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 + )? \$

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