数字和短划线的正则表达式

Question

Currently I write the regex like this: /^([\\d+]*-)+([\\d]*-)+([\\d])*$/

I want the result follow this pattern 00-123-456-789 or 00123456789 (dash between number group or no dash at all)

• not 00-123--457-789
• or -00-123-456-789-
• or -00123456789-
• or 00-123-456-789-

How can I modify the regex to matches the pattern above?

Answer 1

If your question needs the specific segment lengths you specify in your examples, you can use this:

/^\d{2}-?\d{3}-?\d{3}-?\d{3}$/

This will accept 00-123-456-789 , but will allow for any dashes to be missing. If you want to allow only for all dashes or no dashes, then you could use this:

/^\d{2}-\d{3}-\d{3}-\d{3}$|^\d{11}$/

which will accept only 00-123-456-789 or 00123456789 , but not allow only some dashes to be missing.

Or, if you meant that you could have any number of digits and any number of single dashes between them, then you could use this:

/^\d+(-\d+)*$/

Answer 2

尝试这样的事情

/^(\d+-?)+\d+$/

Answer 3

If I understand you correctly, you wish your regex to stand for strings which consist of a number group followed (optionally) by additional number groups with a - separator.

\d+      # represents a number group
(-\d+)*  # represents 0 or more additional number groups beginning with "-"

So, together with the necessary beginning and end of line assertions, together we have:

^\d+(-\d+)*$

Answer 4

The following answer will be used to match

00-123-456-789 or 00 123 456 789

/^[\\d]{2}[-\\s]?[\\d]{3}[-\\s]?[\\d]{3}[-\\s]?[\\d]{3}$/

If you want only to match hyphen(-) or without hyphen(-)

Then it will do

/^[\\d]{2}[-]?[\\d]{3}[-]?[\\d]{3}[-]?[\\d]{3}$/

Answer 5

如果您只想接受## - ### - ### - ###或###########，那么您需要的是：

/^(([\d+]{2}\-)([\d]{3}\-){2}([\d]{3})|[\d]{11})$/

Answer 6

@godwin: since I can't add a comment to your post and no one else seems to have responded, let me address at least one issue. At the beginning you have

[\d+]{2}\-

\\d+ will match one or more digits and you're asking for it to be repeated twice, so the whole segment will match 123456789- :

• [\\d+] = 12345678 (greedy matching)
• [\\d+] = 9
• \\- = -

You also probably didn't need to escape the dash because it's not inside a group block "[]" .

Answer 7

From what have you provided us, this regex ^-?(\\d+-?)+$ matches this

-00-123-456-789-
-00123456789-
00-123-456-789-
00123456789

but doesn't match this:

00-123--457-789

Breakdown:

• the string can start with a dash ( ^-? )
• it has some digits followed by an optional dash ( \\d+-? )
• the last group can be repeated one or more times ( (\\d+-?)+ )
• the string ends ( $ )