擅长:python、mysql、java
<p>因为请求在处理时将<code>,</code>符号编码为<code>%2C</code>。你可以在<a href="https://en.wikipedia.org/wiki/Percent-encoding" rel="nofollow noreferrer">Wiki</a>上找到更多关于<code>URL percent encoding</code>的信息</p>
<blockquote>
<p>When a character from the reserved set (a "reserved character") has
special meaning (a "reserved purpose") in a certain context, and a URI
scheme says that it is necessary to use that character for some other
purpose, then the character must be percent-encoded. Percent-encoding
a reserved character involves converting the character to its
corresponding byte value in ASCII and then representing that value as
a pair of hexadecimal digits. The digits, preceded by a percent sign
(%) which is used as an escape character, are then used in the URI in
place of the reserved character. (For a non-ASCII character, it is
typically converted to its byte sequence in UTF-8, and then each byte
value is represented as above.)</p>
</blockquote>