/**
  * 股票资料写入器
  * @param User $user
  */
 public function upload_stock_data(User $user, $dataNum, $excel_data)
 {
     $em = $this->getDoctrine()->getManager();
     $data = $em->getRepository('AppBundle:Stock')->findAll();
     $stockNames = array();
     foreach ($data as $data_obj) {
         $stockNames[] = $data_obj->getStockName();
     }
     for ($i = 1; $i < $dataNum; $i++) {
         if (in_array($excel_data[$i][1], $stockNames)) {
             $stock_obj = $em->getRepository('AppBundle:Stock')->findBy(array('stock_name' => $excel_data[$i][1]));
             $stock_obj[0]->setStockId($excel_data[$i][0]);
             $stock_obj[0]->setStockName($excel_data[$i][1]);
             $stock_obj[0]->setBuyDate(new \DateTime($excel_data[$i][2]));
             $stock_obj[0]->setPosition($excel_data[$i][3]);
             $stock_obj[0]->setBuyingPrice($excel_data[$i][4]);
             $stock_obj[0]->setCurrentPrice($excel_data[$i][5]);
             $stock_obj[0]->setNote($excel_data[$i][6]);
             $stock_obj[0]->setUser($user);
             $em->flush();
         } else {
             $stock_obj = new Stock();
             $stock_obj->setStockId($excel_data[$i][0]);
             $stock_obj->setStockName($excel_data[$i][1]);
             $stock_obj->setBuyDate(new \DateTime($excel_data[$i][2]));
             $stock_obj->setPosition($excel_data[$i][3]);
             $stock_obj->setBuyingPrice($excel_data[$i][4]);
             $stock_obj->setCurrentPrice($excel_data[$i][5]);
             $stock_obj->setNote($excel_data[$i][6]);
             $stock_obj->setUser($user);
             $em->persist($stock_obj);
             $em->flush();
         }
     }
 }