擅长:python、mysql、java
<p>这应该行得通。在</p>
<p>正则表达式:</p>
<pre><code>^(\d{1,3}(?:,\d{3})*)$
</code></pre>
<p>JavaScript代码:</p>
<p/><div^{cl1}$&13;
<div^{cl2}$&13;
^{pr2}$
;
</div>和13;
</div>和13;
<p>输入:</p>
<pre><code>42
1,234
6,368,745
12,34,567
9999999,123
</code></pre>
<p>输出:</p>
<pre><code>42
1,234
6,368,745
</code></pre>
<p>参见:<a href="https://regex101.com/r/oq67pb/2" rel="nofollow noreferrer">https://regex101.com/r/oq67pb/2</a></p>