phpexcel设置边框不全或者只有竖线问题解决 方法

$objPHPExcel->getActiveSheet()->getStyle('A2:D2')->getBorders()->getAllBorders()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN);

$style_array = array(
                'borders' => array(
                    'allborders' => array(
                        'style' => \PHPExcel_Style_Border::BORDER_THIN
                    )
                )                                                                                                                                                       );
            $sheet->getStyle('A1:L'.($start_row-1))->applyFromArray($style_array);