1：首先用composer require phpoffice/phpexcel

2: 引入相关的类：

use PHPExcel;

use PHPExcel_Cell;

use PHPExcel_Writer_Excel5;

3：下载具体代码

public function exportExcel()

{

$dataArr = Admin::all();

//创建PHPExcel对象

$obj = new PHPExcel();

//创建excel写入对象

$writer = new PHPExcel_Writer_Excel5($obj);

//得到当前工作表对象

$curSheet = $obj->getActiveSheet(0);

foreach ($dataArr as $row => $admObj) { //row 是行，注意从0开始，外循环是行，

$col = 0;

foreach ($admObj->getData() as $field => $value) {

// echo $row ."<=>".$col." , ".$field."=>".$value.'

';

// die();

if ($row == 0) {

// $num 控制的是行，$col控制的是列

//第一行

$cellName = PHPExcel_Cell::stringFromColumnIndex($col) . ($row + 1);//取单元格

$curSheet->setCellValue($cellName, $field);//给单元格赋值

//第二行

$cellName = PHPExcel_Cell::stringFromColumnIndex($col) . ($row + 2);

$curSheet->setCellValue($cellName, $value);

} else {

$cellName = PHPExcel_Cell::stringFromColumnIndex($col) . ($row + 2);

$curSheet->setCellValue($cellName, $value);

}

$col++;

}

}

$fileName = date('YmdHis', time());

header('Content-Type: application/vnd.ms-execl');

header('Content-Disposition: attachment;filename="' . $fileName . '.xls"');

header('Cache-Control: max-age=0');

$writer->save('php://output');

}

4：上传具体代码：

/**

* EXCEL 文件上传并导入数据库

* @throws \PHPExcel_Exception

*/

public function doUpload()

{

$file = request()->file('excel');//接收上传的文件

// 定义文件上传的目录(文件夹)

$uploadDir = '/home/project/kona/think51/public/upload/excel/';

//将文件上传到目标文件夹

$info = $file->move($uploadDir);

if ($info) {//文件上传成功

// 获取上传文件的路径(包括文件夹和文件名)

$fileName = $uploadDir.$info->getSaveName();

//将文件放入PHPEXcel的读取器中

$phpExcelObj = \PHPExcel_IOFactory::load($fileName);

//读取PHPEXcel的sheet[0]的数据，并转换为数组

$sheet = $phpExcelObj->getSheet(0)->toArray();

//移出数组的第一个元素(在此处数组)，并赋值给fields，sheet中不在包含表头行了

$fields = array_shift($sheet);

foreach ($sheet as $row => $ary) {//遍历

//将表头和内容合并成一个数组

$newarr = array_combine($fields, $ary);

unset($newarr['id']);//ID不能插入，删除key为ID的元素

//$newarr['pwd'] = md5($newarr['pwd']);

$admin = new Admin();

$res=$admin->save($newarr);

if(empty($res)) {

$this->success("数据上传失败", "index");

}

}

$this->success("上传成功并插入数据库", "index");

} else {

$this->error($file->getError(), "index");

}

}