public function mysession(){
$data = Db::table('tab_job_weight')->where('JW_UPDATETIME',['>','2017-05-15 07:00:00'],['<','2017-05-15 18:00:00'],'and')->where('JW_CRANEID',3)->select();
session('data',$data);
}
public function showsession(){
$data = session('data');
$this->assign('data',$data);
return $this->fetch();
} 