thinkphp6封装导入导出方法

<?php
// +----------------------------------------------------------------------
author:wjf
// +----------------------------------------------------------------------
declare (strict_types=1);

namespace app\common\service;

use PhpOffice\PhpSpreadsheet\Cell\Coordinate;
use PhpOffice\PhpSpreadsheet\IOFactory;
use think\facade\Filesystem;
use PhpOffice\PhpSpreadsheet\Spreadsheet;

/**
 * 导入导出类
 * Class Goods
 * @package app\store\service
 */
class Excel extends BaseService
{
    /**导入
     * @param string $filename
     * @return array|string|void
     */
    public static function importExcel($filename = "")
    {
        $file[] = $filename;
        try {
            // 验证文件大小，名称等是否正确
            validate(['file' => 'filesize:51200|fileExt:xls,xlsx'])
                ->check($file);
            // 将文件保存到本地(可在fileSystem配置文件中配置)
            $savename = Filesystem::disk('public')->putFile( '', $file[0]);
            // 截取后缀
            $fileExtendName = substr(strrchr($savename, '.'), 1);
            // 有Xls和Xlsx格式两种
            if ($fileExtendName == 'xlsx') {
                $objReader = IOFactory::createReader('Xlsx');
            } else {
                $objReader = IOFactory::createReader('Xls');
            }
            // 设置文件为只读
            $objReader->setReadDataOnly(TRUE);
            // 读取文件，tp6默认上传的文件，在runtime的相应目录下，可根据实际情况自己更改
            $objPHPExcel = $objReader->load(public_path()  .'uploads/'. $savename);
            //excel中的第一张sheet
            $sheet = $objPHPExcel->getSheet(0);
            // 取得总行数
            $highestRow = $sheet->getHighestRow();
            // 取得总列数
            $highestColumn = $sheet->getHighestColumn();
            Coordinate::columnIndexFromString($highestColumn);
            $lines = $highestRow - 1;
            if ($lines <= 0) {
                echo('数据不能为空！');
                exit();
            }
            // 直接取出excle中的数据
            $data = $objPHPExcel->getActiveSheet()->toArray();
            // 删除第一个元素（表头）
            array_shift($data);
            // 返回结果
            return $data;
        } catch (\Exception $e) {
            return $e->getMessage();
        }
    }

    /**导出
     * @param array $header
     * @param bool $type
     * @param array $data
     * @param string $fileName
     * @throws \PhpOffice\PhpSpreadsheet\Writer\Exception
     */
    public static function export(array $header = [], bool $type = true, array $data = [], string $fileName = "")
    {
        // 实例化类
        $preadsheet = new Spreadsheet();
        // 创建sheet
        $sheet = $preadsheet->getActiveSheet();
        // 循环设置表头数据
        foreach ($header as $k => $v) {
            $sheet->setCellValue($k, $v);
        }
        // 生成数据
        $sheet->fromArray($data, null, "A2");
        // 样式设置
        $sheet->getDefaultColumnDimension()->setWidth(12);
        // 设置下载与后缀
        if ($type) {
            header("Content-Type:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
            $type = "Xlsx";
            $suffix = "xlsx";
        } else {
            header("Content-Type:application/vnd.ms-excel");
            $type = "Xls";
            $suffix = "xls";
        }
        // 激活浏览器窗口
        header("Content-Disposition:attachment;filename=$fileName.$suffix");
        //缓存控制
        header("Cache-Control:max-age=0");
        // 调用方法执行下载
        $writer = IOFactory::createWriter($preadsheet, $type);
        // 数据流
        $writer->save("php://output");
    }
}

　　控制器调用方法

   /**
     * @return Json
     * @throws Exception
     */
    public function import(): Json
    {

        $files = $this->request->file('file');
        // 调用类库，读取excel中的内容
        $rows = Excel::importExcel($files);

        if (count($rows) < 1) {
            return $this->renderError('无数据');
        }
     
        return $this->renderSuccess([]);
    }

    public function export()
    {
        // 设置表格的表头数据
        $header = ["A1" => "编号", "B1" => "姓名", "C1" => "年龄"];
        // 假设下面这个数组从数据库查询出的二维数组
        $data = [
            [1,'欧阳',18],
            [2,'张三',19],
            [3,'李四',22],
            [4,'王五',19],
            [5,'赵六',29]
        ];
        // 保存文件的类型
        $type= true;
        // 设置下载文件保存的名称
        $fileName = '信息'.time();
        // 调用方法导出excel
        Excel::export($header,$type,$data,$fileName);
    }