HNWelcomeSystemAdminDcat/app/Admin/Extensions/Exporter/FollowStatisticsExporter.php

<?php

namespace App\Admin\Extensions\Exporter;

use App\Models\UserFollowStatus;
use Dcat\Admin\Grid\Exporters\AbstractExporter;
use Maatwebsite\Excel\Concerns\Exportable;
use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\WithHeadings;
use Maatwebsite\Excel\Concerns\WithMapping;
use Maatwebsite\Excel\Concerns\WithEvents;
use Maatwebsite\Excel\Events\AfterSheet;

class FollowStatisticsExporter extends AbstractExporter implements WithMapping, WithHeadings, FromCollection
{
    use Exportable;

    protected $titles = [];

    public function __construct()
    {
        $this->fileName = '新生回访统计数据-' . date('Y-m-d') . '.xlsx'; //拼接下载文件名称
        $this->titles = ['学院基础信息', '', '总录取', '', '', '未联系', '', ''];
        foreach (UserFollowStatus::query()->orderBy('id', 'asc')->get('name')->toArray() as $key => $item) {
            $this->titles[] = $item['name'];
            $this->titles[] = '';
            $this->titles[] = '';
        }
        parent::__construct();
    }


    public function export()
    {
        // TODO: Implement export() method.
        $this->download($this->fileName)->prepare(request())->send();
        exit;
    }

    public function collection()
    {
        $data = $this->buildData();
        $newData[2] = ['二级学院', '专业', '总人数', '男生', '女生', '总人数', '男生', '女生'];
        foreach (UserFollowStatus::query()->get('id')->toArray() as $key => $item) {
            $newData[2][] = '总人数';
            $newData[2][] = '男生';
            $newData[2][] = '女生';
        }
        foreach ($data as $key => $item) {
            $newData[] = $item;
        }
        // TODO: Implement collection() method.
        return collect($newData);
    }

    public function headings(): array
    {
        // TODO: Implement headings() method.
        return $this->titles;
    }

    public function map($row): array
    {
        // 直接返回row 导出全部字段 dd($row);
        // return $row;
        foreach ($row as $k => $v) {
            $row[$k] = (string)$v;
        }

        // TODO: Implement map() method.
        return $row;
    }
}