think PHP6 excel导出

封装基础库

基础层的作用：负责封装特定功能的库或应用第三方类库

在lib层添加Excel类

在Excel类中定义静态的方法，方便调用

namespace app\admin\lib;

use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Spreadsheet;

class Excel
{
    /**
     * 导出
     * @param array $header
     * @param bool $type
     * @param array $data
     * @param string $fileName
     * @return \think\response\Json|void
     * @throws \PhpOffice\PhpSpreadsheet\Exception
     * @throws \PhpOffice\PhpSpreadsheet\Writer\Exception
     */
    public static function export($header = [], $type = true, $data = [], $fileName = "1910"){
        // 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";
            $suffix = "xls";
        }
        ob_end_clean();//清楚缓存区
        // 激活浏览器窗口
        header("Content-Disposition:attachment;filename=$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");
        exit();
    }
}

 控制器中调用

/**
     * excel导出
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     * @throws \think\exception\DbException
     */
    public function excel(){
//        设置表格的表头数据 A1 B1 C1 D1……  以此类推
        $header = ["A1"=>"id","B1"=>"角色编码","C1"=>"角色名"];
        //调用Role模型从Role表查询数据并转数组
        $arr = \app\admin\model\Role::sel()->toArray();
        //定义空数组
        $data = [];
//        将需要到出的数组方法到$data中
        foreach ($arr as $v){
            $data[] = [
                'id'=>$v['id'],
                'role_code'=>$v['role_code'],
                'role_name'=>$v['role_name'],
            ];
        }
        //保存文件类型
        $type = true;
        //设置下载文件保存的名称
        $fileName = "用户角色信息统计表".time();
        //调用方法导出excel
        Excel::export($header,$type,$data,$fileName);
    }