t_nine/app/Exports/ExportOrder.php

<?php

namespace App\Exports;

use Illuminate\Support\Collection;
use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\WithCustomValueBinder;
use Maatwebsite\Excel\Concerns\WithEvents;     // 自动注册事件监听器
use Maatwebsite\Excel\Concerns\WithHeadings;
use Maatwebsite\Excel\Concerns\WithStrictNullComparison;    // 导出 0 原样显示，不为 null
use Maatwebsite\Excel\Events\AfterSheet;
use PhpOffice\PhpSpreadsheet\Cell\Cell;
use PhpOffice\PhpSpreadsheet\Cell\DataType;
use PhpOffice\PhpSpreadsheet\Cell\DefaultValueBinder;

class ExportOrder extends DefaultValueBinder implements WithCustomValueBinder , FromCollection, WithEvents, WithStrictNullComparison,withHeadings
{
    /**
     * @return \Illuminate\Support\Collection
     */
    public function __construct($data,$type=1,$headers)
    {
        $this->data = $data;
        $this->type = $type;
        $this->headers = $headers;
    }

    public function registerEvents(): array
    {
        //区分不通状态的合同导出，格式不同
            $type = $this->type.'_set';
            return $this->$type();
    }

    //数组转集合
    public function collection()
    {
        return new Collection($this->createData());
    }

    //业务代码
    public function createData()
    {
        $name = $this->type;
        $data = $this->export();
        return $data;

    }

    public function bindValue(Cell $cell, $value)
    {
        // 检查是否需要保留前导零
//        if (is_string($value) && ctype_digit($value) && strpos($value, '0') === 0) {
//            $cell->setValueExplicit($value, DataType::TYPE_STRING);
//            return true;
//        }

        if (is_numeric($value)) {
            $cell->setValueExplicit($value, DataType::TYPE_STRING2);

            return true;
        }

        // else return default behavior
        return parent::bindValue($cell, $value);
    }

    // 自定义表头，需实现withHeadings接口
    public function headings(): array
    {
        return $this->headers;
    }

    private function export(){
        $list = [];
        foreach ($this->data as $v){
            $list[] = $v;
        }
        return $list;
    }

    private function default_set(){
        return [
            AfterSheet::class => function (AfterSheet $event) {
                $count = count($this->data);

                //设置区域单元格水平居中
                $event->sheet->getDelegate()->getStyle('A1:'.'M'.($count+1))->getAlignment()->setHorizontal(\PhpOffice\PhpSpreadsheet\Style\Alignment::HORIZONTAL_CENTER);

                // 定义列宽度
                $widths = ['A' => 20, 'B' => 20, 'C' => 20, 'D' => 20, 'E' => 20, 'F' => 20, 'G' => 20, 'H' => 20, 'I' => 20, 'J' => 20, 'K' => 20, 'L' => 20, 'M' => 20, 'O' => 20, 'P' => 20, 'Q' => 20, 'R' => 20, 'S' => 20, 'T' => 20, 'U' => 20, 'V' => 20, 'W' => 20, 'X' => 20, 'Y' => 20, 'Z' => 20];
                foreach ($widths as $k => $v) {
                    // 设置列宽度
                    $event->sheet->getDelegate()->getColumnDimension($k)->setWidth($v);
                }
            },
        ];
    }

    private function salary_set(){
        return [
            AfterSheet::class => function (AfterSheet $event) {
                $count = count($this->data);

                //设置区域单元格水平居中
                $event->sheet->getDelegate()->getStyle('A1:'.'M'.($count+2))->getAlignment()->setHorizontal(\PhpOffice\PhpSpreadsheet\Style\Alignment::HORIZONTAL_CENTER);

                // 定义列宽度
                $widths = ['A' => 20, 'B' => 20, 'C' => 20, 'D' => 20, 'E' => 20, 'F' => 35, 'G' => 25, 'H' => 25, 'I' => 25, 'J' => 25, 'K' => 25, 'L' => 25, 'M' => 25];
                foreach ($widths as $k => $v) {
                    // 设置列宽度
                    $event->sheet->getDelegate()->getColumnDimension($k)->setWidth($v);
                }
            },
        ];
    }

    private function jc_set(){
        return [
            AfterSheet::class => function (AfterSheet $event) {
                $count = count($this->data);

                // 合并表头单元格
                $event->sheet->getDelegate()->mergeCells('A1:A2');
                $event->sheet->getDelegate()->mergeCells('B1:B2');
                $event->sheet->getDelegate()->mergeCells('C1:E1');
                $event->sheet->getDelegate()->mergeCells('F1:H1');
                $event->sheet->getDelegate()->mergeCells('I1:K1');
                $event->sheet->getDelegate()->mergeCells('L1:N1');

                //设置区域单元格水平居中
                $event->sheet->getDelegate()->getStyle('A1:'.'M'.($count+2))->getAlignment()->setHorizontal(\PhpOffice\PhpSpreadsheet\Style\Alignment::HORIZONTAL_CENTER);

                // 定义列宽度
                $widths = ['A' => 20, 'B' => 20, 'C' => 10, 'D' => 10, 'E' => 10, 'F' => 10, 'G' => 10, 'H' => 10, 'I' => 10, 'J' => 10, 'K' => 10, 'L' => 10, 'M' => 10];
                foreach ($widths as $k => $v) {
                    // 设置列宽度
                    $event->sheet->getDelegate()->getColumnDimension($k)->setWidth($v);
                }
            },
        ];
    }
}