/*
If you have iconv enabled (visit http://php.net/iconv for more information),
you can use this directive to specify the encoding of file names in your
system. Acceptable values can be found at:
 http://www.gnu.org/software/libiconv/

Examples:
 $config['FilesystemEncoding'] = 'CP1250';
 $config['FilesystemEncoding'] = 'ISO-8859-2';
*/
$config['FilesystemEncoding'] = 'UTF-8';

将UTF-8修改为GB2312，上传后文件名正确了，但在CKEditor中显示的链接出现乱码，因为CKEditor所在页面使用的字符集是UTF-8，未去细究如何解决这个问题，采用了文件重命名的方案去替代解决。

上传文件重命名

修改ckfinder\core\connector\php\php5\CommandHandler\FileUpload.php

找到以下代码

if ($sFileName != $sUnsafeFileName) {
  $iErrorNumber = CKFINDER_CONNECTOR_ERROR_UPLOADED_INVALID_NAME_RENAMED;
}

在这段代码之后添加

$sExtension=CKFinder_Connector_Utils_FileSystem::getExtension($sFileName);
$sFileName=date('YmdHis').'.'.$sExtension;