wkshi/app/Admin/Extensions/ExcelExpoter.php

<?php
/**
 * Created by PhpStorm.
 * User: wenzhi
 * Date: 2019/2/18
 * Time: 2:25 PM
 */

namespace App\Admin\Extensions;


namespace App\Admin\Extensions;
use App\Examarg;
use App\Grade;
use App\School;
use App\Sclass;
use App\User;
use Encore\Admin\Grid\Exporters\AbstractExporter;
use Maatwebsite\Excel\Facades\Excel;
use PHPExcel_Worksheet_Drawing;


class ExcelExpoter extends AbstractExporter{

    protected $head = [];
    protected $body = [];
    public function setAttr($head, $body){
        $this->head = $head;
        $this->body = $body;
    }

    public function export()
    {

        $fileName = date('YmdHis') . '-' . uniqid();
        $this->ndata = array();

        foreach ($this->getData() as $datum=>$value) {
            $username='';
            $examname='';
            $sclassinfo='';

            $name = User::where('id',$value['user_id'])->select("name","school_id","sclass_id","grade_id")->first();
            if($name){
                $username = $name['name'];
                $school_name = School::where("id",$name['school_id'])->select('name')->first();
                if($school_name){
                    $school_name = $school_name['name'];
                }
                $grade = Grade::where("id",$name['grade_id'])->select('name')->first();
                if($grade){
                    $grade = $grade['name'];
                }
                $sclass = Sclass::where("id",$name['sclass_id'])->select('name')->first();
                if($sclass){
                    $sclass = $sclass['name'];
                }

                $exam = Examarg::where('id',$value['examarg_id'])->select('name')->first();
                if($exam){
                    $examname = $exam['name'];
                }

            }
            $this->ndata[]=array(
                '编号'=>$datum+1,
                '姓名'=>$username,
                '学校' => $school_name,
                '年级'=>$grade,
                '班级'=>$sclass,
                '试卷名称'=>$examname,
                '成绩'=>$value['grade'],
                '考试时间'=> $value['created_at']
            );

        }

//        dd($this->ndata);

        Excel::create($fileName, function($excel) {
            $excel->sheet('学生成绩', function($sheet) {

                // 这段逻辑是从表格数据中取出需要导出的字段
                $head = ['编号', '姓名', '学校', '年级', '班级', '试卷名称','成绩','考试时间'];
                $rows = collect([$head]);
                $sheet->rows($rows);
                $rows = collect($this->ndata)->map(function ($item) {
//                    dd($this->getData());
                    return array_only($item, ['编号', '姓名', '学校', '年级', '班级', '试卷名称','成绩','考试时间']);
                });
//                dd($rows);
                $sheet->rows($rows);

            });

        })->export('xls');
    }


}