/**
*一些初始化任务，在这里初始化任务静态变量
*/
private static function init()
{
self::$config = (include dirname(__FILE__) . '/../config/config.php');
$db = new DB(self::$config['stat']);
$data = $db->select('SELECT * FROM task');
foreach ($data as $row) {
self::$tasks[$row['name']] = $row;
}
}