一、导出文件

1.创建一个干净的控制器 ExcelController.php ：

php artisan make:controller ExcelController --plain

2.然后在 routes.php 中定义相关路由：

Route::get('excel/export','ExcelController@export');
Route::get('excel/import','ExcelController@import');

3.接下来在 ExcelController.php 中定义 export 方法实现导出功能：

<?php
 
namespace App\Http\Controllers;
use Illuminate\Foundation\Bus\DispatchesJobs;
use Illuminate\Routing\Controller as BaseController;
use Illuminate\Foundation\Validation\ValidatesRequests;
use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
use PHPExcel;//引入excel类
use IOFactory;
use DB;
class ExcelController extends Controller
{
     //导出
    public function Excel(){
        $query=DB::table('change')->get();//查询表
        //print_r($query);
        if(!$query) return false;//判断是否为空值
        $obj=new PHPExcel();//实例化excel类
        include_once('../app/libs/PhpExcel/PHPExcel/IOFactory.php');//引入IOFactory.php
        $obj->getProperties()-> setTitle("export") ->setDescription("none");
        $obj-> setActiveSheetIndex(0);
        $fields = DB::select("SHOW COLUMNS FROM `change`");//查询goods表中所有列名
         //print_r($fields);die;
        $col = 0;//定义列
        foreach($fields as $field){
            $field =$field['Field'];
            $obj-> getActiveSheet() -> setCellValueByColumnAndRow($col, 1,$field);
            $col++;
        }
        $row = 2;//定义行
        foreach($query as $data)
        {
            $col =0;
            foreach($fields as $field)
            {
 
                //print_r($data);
 
                $field =$field['Field'];
 
                $obj->getActiveSheet()->setCellValueByColumnAndRow($col,$row,!empty($data["$field"])?$data["$field"]:'');
 
                $col++;
 
            }
 
            $row++;
 
        }
        $obj-> setActiveSheetIndex(0);
        $objWriter =IOFactory :: createWriter($obj, 'Excel5');
        header('Content-Type:application/vnd.ms-excel');
        header('Content-Disposition:attachment;filename="Brand_' .date('Y-m-d') . '.xls"');
        header('Cache-Control:max-age=0');
        $objWriter-> save('php://output');
 
    }
}