用PhpSpreadsheet读取xlsx表格模板进行数据导出

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/**
     * @param array $dataList 数据列表，为数字索引
     * @param string $title 导出文件名
     * @param string $tpl excel的模板文件
     * @param int $begin 模板的数据起始行数，从1开始计数除去header的行
     * @throws \PhpOffice\PhpSpreadsheet\Exception
     * @throws \PhpOffice\PhpSpreadsheet\Writer\Exception
     */
    public static function CustomSaveExcel($dataList=[],$title,$tpl='',$begin=0){
        if(!$tpl||!is_file($tpl)){
            throw new \Exception("模板文件不存在！");
        }
        //引入核心文件
        ini_set('memory_limit','1024M');
        // 要读取的文件的路径
        $spreadSheet = IOFactory::load($tpl);
        $letter = array('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','AA','AB','AC','AD','AE','AF','AG','AH','AI','AJ','AK','AL','AM','AN','AO','AP','AQ','AR','AS','AT','AU','AV','AW','AX','AY','ZZ','BA','BB','BC','BD','BE','BF','BG','BH','BI','BJ','BK','BL','BM','BN','BO','BP','BQ','BR','BS','BT','BU','BV');
        $spreadSheet->setActiveSheetIndex(0);
        foreach ($dataList as $key => $row) {

            $newobj =  $spreadSheet->setActiveSheetIndex(0);
            foreach ($row as $rowInex => $rowValue) {
                $index = $letter[$rowInex].($begin);
                static::dealVal($rowValue);
                if(is_numeric($rowValue) && !is_float($rowValue) && !is_double($rowValue) && strlen($rowValue)>10){
                    $newobj->setCellValueExplicit($index, $rowValue, DataType::TYPE_STRING);
                }
                else{
                    $newobj->setCellValue($index, $rowValue);
                }

                $newobj->getStyle($index)->getAlignment()->setWrapText(true);
            }
            $begin++;
        }
        ob_end_clean();
        header("Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
        header("Content-Disposition: inline;filename=\"".$title.".xlsx\"");
        header('Cache-Control: max-age=0');
        $objWriter = IOFactory::createWriter($spreadSheet, 'Xlsx');
        $objWriter->save('php://output');
    }

    public static function dealVal(&$val){
        if(strtolower($val)===null||(is_numeric($val)&&$val == 0)){
            $val = '/';
        }
    }

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