private static function _setRandFont()
{
$_path = Wind::getRealDir(self::$path . '.font');
if (self::$verifyType < 5) {
$_fontList = self::getEnFontList();
} else {
$_fontList = self::getCnFontList();
}
$key = self::$isRandFont ? array_rand($_fontList, 1) : 0;
self::$_font = $_path . '/' . $_fontList[$key];
return;
}