public function actionSitemap()
{
$page = $_GET['id'];
$page = isset($page) ? $page : 1;
$dir = Yii::app()->basePath . '/runtime/site/sitemap' . $page . '.xml';
$a = $_GET['a'];
$obj = new Sitemap();
if ($a == 'update' || !file_exists($dir)) {
$limit = 10000;
$start = ($page - 1) * $limit;
$rss = $obj->show(Posts::CLASSIFY_POST, $start, $limit);
if ($rss) {
$obj->saveToFile($dir);
} else {
exit($page . '-->empty');
}
} else {
$rss = $obj->getFile($dir);
}
//rss创建
$this->render('//site/sitemap', array('rss' => $rss));
}