TP5操作Excel导入导出数据库

导入：

<?php

namespace app\index\controller;


use think\Controller;
use think\Db;
use think\Loader;

class Upload extends Controller
{
    public function upload(){
        return view();
    }
    //excel导入
    public function upload_excel(){
        //设置文件上传的最大限制
        ini_set('memory_limit','1024M');
        //加载第三方类文件
        Loader::import("PHPExcel.Classes.PHPExcel");
        //防止乱码
        header("Content-type:text/html;charset=utf-8");
        //实例化主文件
//        $model = new \PHPExcel();
        //接收前台传过来的execl文件
        $file = $_FILES['file'];
        //截取文件的后缀名，转化成小写
        $extension = strtolower(pathinfo($file['name'],PATHINFO_EXTENSION));
        if($extension == "xlsx"){
            //2007(相当于是打开接收的这个excel)
            $objReader = \PHPExcel_IOFactory::createReader('Excel2007');
        }else{
            //2003(相当于是打开接收的这个excel)
            $objReader = \PHPExcel_IOFactory::createReader('Excel5');
        }

        $objContent = $objReader -> load($file['tmp_name']);
        $sheetContent = $objContent -> getSheet(0) -> toArray();
        unset($sheetContent[0]);
        foreach ($sheetContent as $k => $v){
            $arr['name'] = $v[0];
            $arr['sex'] = $v[1];
            $arr['age'] = $v[2];
            $arr['class'] = $v[3];
            $res[] = $arr;
        }
        $res = Db::name('user') -> insertAll($res);
        if($res){
            echo "成功";
        }else{
            echo "失败";
        }
    }
}

导出：

//导出
public function out_excel(){
    ini_set('memory_limit','1024M');
    Loader::import('PHPExcel.Classes.PHPExcel');
    header("content-type:text/html;charset=utf8");
    $objExcel = new \PHPExcel();
    $objSheet = $objExcel -> getActiveSheet();
    $objSheet -> setTitle("PHPExcel导出测试");
    $data = Db::name('user') -> select();
    $objSheet -> setCellValue('A1','ID')
            -> setCellValue('B1','姓名')
    $j = 2;
    foreach ($data as $k => $v){
        $objSheet -> setCellValue('A'.$j,$v['id'])
            -> setCellValue('B'.$j,$v['name'])
        $j++;
    }
    $file_name = '文件名'.xlsx';
    header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
    header("Content-Disposition: attachment;filename=$file_name");
    header('Cache-Control: max-age=0');
    header('Cache-Control: max-age=1');
    header ('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
    header ('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
    header ('Cache-Control: cache, must-revalidate');
    header ('Pragma: public'); 

    $objWriter = \PHPExcel_IOFactory::createWriter($objExcel, 'Excel2007');
    $objWriter->save('php://output');
    exit;
}