CODEWITHSUNDEEP
javaregex
Razvan Cristian Lung
Razvan Cristian Lung

Reputation: 6051

Java RegEx combine patterns in any form

I'm trying to match some legal documents links. I've gone fare enough but I think I'm missing something. This is my work for now:

(\d( )?)?(([[a-zA-Z]\.])+?) ([0-9]+?)\b:([0-9]+?)?\b

I have a base construction witch I can match:

? = optional

number/space?/string/space/number/:/number

But now I want to optionally match any combination of the fallowing:

-/number
,/space/number
,/space/number/-/number

This is my best match:

(\d( )?)?(([[a-zA-Z]\.])+?) ([0-9]+?)\b:([0-9]+?)(, [0-9]+?)?(-[0-9]+?)?(, ([0-9]+?)-([0-9]+?)?)?\b

I can match this:

8 Law 84:145, 252-320

But not this:

8 Law 84:145, 252-320, 458, 517-665

Upvotes: 1

Views: 101

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 626738

You may use

(\d+)\s*([a-zA-Z]+)\s+(\d+):(\d+)((?:-\d+|,\s\d+(?:-\d+)?)*)

See the regex demo

The main part I added is ((?:-\d+|,\s\d+(?:-\d+)?)*) that matches and captures into a group 0 or more sequences of:

  • -\d+ - a hyphen and 1+ digits
  • | - or
  • ,\s\d+(?:-\d+)? - comma, whitespace, 1+ digits, and then an optional sequence of - and 1+ digits.

Do not forget to double backslashes in the Java string literal inside the code.

Upvotes: 1

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