需要一个正则表达式-只允许零，允许零与其他数字

Question

I want to validate a string to meet the following patterns:

00;0 (disallow)
00;00 (disallow)
01;123 (disallow)
00;1
00; (disallow)
00;000000 (disallow)
00;1234567890123 (disallow)
00;123456789012
00;10
00;01
00;00001
00;00100
00;0202020
00;1000000
00;00100100

In general, the string should be ^00;\\d{1,12}$ but how to eliminate unnecessary lines in the example above and resolve the necessary in one regex expression?

Thanks.

Answer 1

You may use this regex:

^00;(?!0+$)\d{1,12}$

RegEx Demo

RegEx Details:

• ^00; : Match 00; at start of line
• (?!0+$) : Negative lookahead to fail the match if we have all zeroes
• \\d{1,12}$ : Match 1 to 12 characters of any digit before end