public function export()
{
$u = M('User');
$uList = $u->field('name,email,type,phone')->select();
$titles = array();
$titles[] = "用户姓名";
$titles[] = "用户邮箱";
$titles[] = "类型（1：工程师；2：客户）";
$titles[] = "电话";
parent::exportexcel($uList, $titles, "user");
}
