擅长:python、mysql、java
<h2>精确匹配</h2>
<p>匹配<code>0.0.0.0</code>到<code>255.255.255.255</code>。如果指定了CIDR块,则仅当CIDR是<code>16</code>或<code>24</code>时才匹配。<strong><a href="http://regexr.com?31v22" rel="nofollow">In action</a></strong>:</p>
<pre class="lang-sh prettyprint-override"><code>^ # Start string
(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)\. # A in A.B.C.D
(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)\. # B in A.B.C.D
(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)\. # C in A.B.C.D
(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)($|/(16|24))? # D in A.B.C.D and /16 or /24
$ # End string
</code></pre>