PHP导出excel时科学计数法的处理

$activeSheet->getStyle($this->numToEn($col).($row+2))->getNumberFormat()->setFormatCode(PHPExcel_Style_NumberFormat::FORMAT_TEXT);
					$activeSheet->setCellValue($this->numToEn($col).($row+2)," ".$elements[$row][$col]);  //在写入Excels单元格的内容之前加一个空格，防止长数字被转化成科学计数法
					$activeSheet->getStyle($this->numToEn($col).($row+2))->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);