用于验证电话号码的正则表达式模式

Question

I have a input string ("My phone number is 860-678 - 2345"). From the input string I need to validate phone number using Regex.

I am using the below pattern but it doesn't work if the phone number contains white Space in it.

[(]?[2-9]{1}[0-9]{2}[)-. ,]?[2-9]{1}[0-9]{2}[-. ,]?[0-9]{4}

Thanks.

Answer 1

The following regular expression:

(\([2-9]\d\d\)|[2-9]\d\d) ?[-.,]? ?[2-9]\d\d ?[-.,]? ?\d{4}

matches all of the following:

860-678-2345
(860) 678-2345
(860) 678 - 2345

and probably a fair amount else too. Broken down:

• (\\([2-9]\\d\\d\\)|[2-9]\\d\\d) - Matches the first part of the number with or without brackets
• ?[-.,]? ? - A hyphen, period (or full stop to us Brits) or a comma, with or without surrounding spaces.
• [2-9]\\d\\d - Matches the second part of the number.
• \\d{4} - Matches the final part of the number.

\\d\\d and [0-9]{2} are equivalent; the former is just slightly shorter so improves readability. Likewise, [2-9] and [2-9]{1} are equivalent; the {1} just means "one instance of the preceeding pattern", which is a given anyway.

Answer 2

You could check for spaces seperately before and after the seperating charactors.

[(]?[2-9]{1}[0-9]{2}[ ]?[)-.,]?[ ]?[2-9]{1}[0-9]{2}[ ]?[-.,]?[ ]?[0-9]{4}

Keep in mind, this wont actually match the parens so something like (234-567, 1234 would match. So if you want more strict matching, you will need a much more complicated regex or code the validation using something else.

Answer 3

最好的办法是先去除所有空白，然后，您可以轻松地使用已完成的RE验证您的数字。

Answer 4

This might help you:

(?\\d{3})?-? *\\d{3}-? *-?\\d{4}

Refer: Regular Expression Liberary