How to implement excel import and export in thinkPHP5.0? (code example)

<?php
namespace Admin\Controller;
use Think\Controller;
class ExcelController extends Controller {
    public function excelList(){
        $this->display();
    }
//    导入
    public function import(){
        if(!empty($_FILES[&#39;file_stu&#39;][&#39;name&#39;])){
            $tmp_file = $_FILES[&#39;file_stu&#39;][&#39;tmp_name&#39;];    //临时文件名
            $file_types = explode(&#39;.&#39;,$_FILES[&#39;file_stu&#39;][&#39;name&#39;]); //  拆分文件名
            $file_type = $file_types [count ( $file_types ) - 1];   //  文件类型
            /*判断是否为excel文件*/
            if($file_type == &#39;xls&#39; || $file_type == &#39;xlsx&#39;|| $file_type == &#39;csv&#39;){    //  符合类型
                /*上传业务*/
                $upload = new \Think\Upload();
                $upload->maxSize   =     3145728 ;
                $upload->exts      =     array(&#39;xls&#39;, &#39;csv&#39;, &#39;xlsx&#39;);
                $upload->rootPath  =      &#39;./Public&#39;;
                $upload->savePath  =      &#39;/Excel/&#39;;
                $upload->saveName  =      date(&#39;YmdHis&#39;);
                $info   =   $upload->upload();
                if(!$info) {    // 上传错误提示错误信息
                    $this->error($upload->getError());
                }else{  // 上传成功

                    //  读取文件
                    $filename=&#39;./Public&#39;.$info[&#39;file_stu&#39;][&#39;savepath&#39;].$info[&#39;file_stu&#39;][&#39;savename&#39;];
                    import("Org.Yufan.ExcelReader");
                    vendor(&#39;PHPExcel.PHPExcel&#39;);
                    $reader = \PHPExcel_IOFactory::createReader(&#39;Excel2007&#39;); //设置以Excel5格式(Excel97-2003工作簿)
                    $PHPExcel = $reader->load($filename); // 载入excel文件
                    $sheet = $PHPExcel->getSheet(0); // 读取第一個工作表
                    $highestRow = $sheet->getHighestRow(); // 取得总行数
                    var_dump($highestRow);
                    $highestColumm = $sheet->getHighestColumn(); // 取得总列数

                    /** 循环读取每个单元格的数据 */
                    $data = array();
                    for ($row = 2; $row <= $highestRow; $row++){//行数是以第1行开始

                        if($column = &#39;A&#39;){
                            $data[&#39;name&#39;] = $sheet->getCell($column.$row)->getValue();
                        }
                        if($column = &#39;B&#39;){
                            $data[&#39;account&#39;] = $sheet->getCell($column.$row)->getValue();
                        }
                        if($column = &#39;C&#39;){
                            $data[&#39;password&#39;] = $sheet->getCell($column.$row)->getValue();
                        }
                        M(&#39;data&#39;)->add($data);
                    }
                        $this->success(&#39;导入数据库成功&#39;,U(&#39;Excel/show&#39;));
                }
            } else{ //  不符合类型业务
                $this->error(&#39;不是excel文件，请重新上传...&#39;);
            }
        }else{
            $this->error(&#39;(⊙o⊙)~没传数据就导入&#39;);
        }
    }
    //导出
    public function export(){
        import("ORG.Yufan.Excel");
        $list = M(&#39;data&#39;)->select();
        if($list == null){
            $this->error(&#39;数据库信息为空...&#39;,__APP__.&#39;/Admin/Excel/show&#39;);
        }else{
            $row=array();
            $row[0]=array(&#39;平台名称&#39;,&#39;帐号&#39;,&#39;密码&#39;);
            $i=1;
            foreach($list as $v){
                $row[$i][&#39;name&#39;] = $v[&#39;name&#39;];
                $row[$i][&#39;account&#39;] = $v[&#39;account&#39;];
                $row[$i][&#39;password&#39;] = $v[&#39;password&#39;];
                $i++;
            }
            $xls = new \Excel_XML(&#39;UTF-8&#39;, false, &#39;datalist&#39;);
            $xls->addArray($row);
            $xls->generateXML(date(&#39;YmdHis&#39;));
        }
    }
    public function show(){
        $m = M(&#39;data&#39;);
        $data = $m->select();
        $this->assign(&#39;data&#39;,$data);
        $this->display();
    }
}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Excel导入导出</title>
</head>
<body>

<p class="page-header">
    <h1>TP DEMO
        <small>Excel导入导出练习</small>
    </h1>
</p>

<form method="post" action="{:U(&#39;Excel/import&#39;)}" class="form-signin" enctype="multipart/form-data" >
    <input name="file_stu" type="file" class="form-control">
    <button class="btn btn-lg btn-primary btn-block">导入</button>
</form>
</body>
</html>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>表格展示</title>
</head>
<body>
<p class="page-header">
    <h1>TP DEMO
        <small>Excel导入导出练习</small>
    </h1>
</p>

<table class="table">
    <tr>
        <td><h4><b>平台名称</b></h4></td>
        <td><h4><b>帐号</b></h4></td>
        <td><h4><b>密码</b></h4></td>
    </tr>
    <foreach name="data" item="vo">
        <tr>
            <td>{$vo.name}</td>
            <td>{$vo.account}</td>
            <td>{$vo.password}</td>
        </tr>
    </foreach>
</table>



<form action="{:U(&#39;Excel/export&#39;)}" class="form-signin">
    <button class="btn btn-lg btn-primary btn-block">导出数据库数据</button>
</form>

</body>
</html>