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          Common Regular Expressions

          "^ \ D + $" / / non-negative integers (positive integer + 0)

          "^ [0-9] * [1-9] [0-9] * $" / / a positive integer

          "^((- \ D +) | (0 +))$" / / non-positive integer (negative integer + 0)

          "^ - [0-9] * [1-9] [0-9] * $" / / negative integer

          "^ -? \ D + $" / / integer

          "^ \ D + (\. \ D +)?$" / / non-negative floating-point (positive float + 0)

          "^(([ 0-9] + \. [0-9] * [1-9] [0-9 ]*)|([ 0-9] * [1-9] [0-9] * \ . [0-9 ]+)|([ 0-9] * [1-9] [0-9 ]*))$" / / are floating point

          "^((- \ D + (\. \ D +)?)|( 0 + (\ .0 +)?))$" / / non-positive floating-point (negative float + 0)

          "^(-(([ 0-9] + \. [0-9] * [1-9] [0-9 ]*)|([ 0-9] * [1-9] [0-9] * \. [0-9 ]+)|([ 0-9] * [1-9] [0-9 ]*)))$" / / negative float

          "^(-? \ D +) (\. \ D +)?$" / / float

          "^ [A-Za-z] + $" / / by the 26 English letters in the string

          "^ [AZ] + $" / / by the 26 English letters Uppercase a string

          "^ [Az] + $" / / by the 26 English letters in lower case string of

          "^ [A-Za-z0-9] + $" / / by the numbers and 26 English-letter string

          "^ \ W + $" / / by the numbers, 26 English letters or underscore a string

          "^ [\ W-] + (\. [\ W-]+)*@[ \ w-] + (\. [\ W-]+)+$" or w +([-+.] w +) * @ w +([-.] w +) *. w +([-.] w +) * "/ / email address
          "^ [A-zA-z ]+://( \ w + (- \ w +)*)( \. (\ W + (- \ w +)*))*( \? \ S *)?$" / / url

          "((D (3,4)) | d (3,4) -)? D (7,8) (-d (3)) *" / / China's phone number validation
          If :0511-match form or 021-44055520-555 or 4405222 or 021-87888822 (0511) 4,405,222

          "D (6)" / / China Postal Code authentication
          Match forms such as: 215 421

          "D (18) | d (15)" / / ID verification
          Matching forms, such as: 15 or 18 identity

          [^<>&/|' \] + / / Illegal character verification
          Match illegal characters such as: <> & / '|
          Regular Expressions

          ((((19) (1) | (20) (1)) d (2)) | d (2)) [01] (1) d (1) [0-3] (1) d (1) / / Date validation
          Match forms such as: 20030718,030718

          Declined comment

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