app-api/app/Exports/ExcelExport.php

<?php

namespace App\Exports;

use App\Models\User;
use Illuminate\Support\Facades\Log;
use Maatwebsite\Excel\Concerns\FromCollection;
use Maatwebsite\Excel\Concerns\WithEvents;
use Maatwebsite\Excel\Concerns\WithHeadings;
use Maatwebsite\Excel\Concerns\WithTitle;
use Maatwebsite\Excel\Events\AfterSheet;

class ExcelExport implements FromCollection, WithHeadings, WithEvents
{
    public function collection()
    {
        return collect(
            [
                '2024年9月',
'艳霞',
'156****9339',
'38',
'',
'38',
'20',
'760',
'小温',
'133****3328',
'批发商',

            ]
           );
    }

    public function headings(): array
    {
        return['进货月份',
'进货人（批发商）昵称',
'进货人（批发商）手机号',
'半醉浓香型件数',
'半醉酱香型件数',
'件数合计',
'每件补助',
'补助金额',
'补助接收者昵称',
'补助接收者手机号',
'补助接收者身份'
];
    }

    public function setRowHeight(array $rouHeight)
    {
        $this->RowHeight=$rouHeight;
    }

    public function registerEvents(): array
    {
        return [
            AfterSheet::class => function(AfterSheet $event) {
                // 合并单元格，从 A1 到 C1
                $sheet = $event->sheet;
//                $sheet->mergeCells('A1:C1');
//                $sheet->setCellValue('A1','进货人信息');

                // 设置字体加粗、居中等样式
                $sheet->getStyle('A1')->getFont()->setBold(true);
                $sheet->getStyle('A1')->getAlignment()->setHorizontal('center');

//                $sheet->mergeCells('D1:I1');
//                $sheet->setCellValue('D1','进货数量及金额');

                // 设置字体加粗、居中等样式
                $sheet->getStyle('D1')->getFont()->setBold(true);
                $sheet->getStyle('D1')->getAlignment()->setHorizontal('center');

//                $sheet->mergeCells('J1:L1');
//                $sheet->setCellValue('J1','拿补助的人信息');


                // 设置字体加粗、居中等样式
                $sheet->getStyle('J1')->getFont()->setBold(true);
                $sheet->getStyle('J1')->getAlignment()->setHorizontal('center');

//                $sheet->mergeCells('M1:N1');
//                $sheet->setCellValue('M1','补助明细及金额');

                $sheet->getStyle('M1')->getFont()->setBold(true);
                $sheet->getStyle('M1')->getAlignment()->setHorizontal('center');

                $sheet->getColumnDimension('B')->setWidth(20);
                $sheet->getColumnDimension('K')->setWidth(20);
                $sheet->setHeight=20;

//                $sheet->getStyle('A:N')->getAlignment()->setHorizontal('center');
            },
        ];
    }
}