PHPExcel与ajax结合进行文件下载

Posted 2021-04-15 雨中慢步

本实例是基于thinkphp3.2框架，ajax-post异步请求，因为是异步请求，所以请求成功之后页面不会刷新亦不会跳转，所以当时为
了将生成的excel数据导出到本地，后台采用了这种方式生成excel表格：
namespace Home/Controller;
use Think/Controller;
class dataDeal extends Controller{
    public function load_excel(){
        $data = I('post.');
        if (!$data){
            $this->apiOut(119);
        }
        vendor('PHPExcel');
        $phpExcel = new \PHPExcel();
        vendor('PHPExcel_Style_Alignment');
        $i = 3;
        $interval = null;
        $first = reset($data);
        $user_data = $first['data'];
        $first_key = key($data);
        /*start---判断是日、周、月转化率*/
        if (strtotime($first_key)){
            $interval = '日';
        }elseif (strtotime(explode('至',$first_key)[1])-strtotime(explode('至',$first_key)[0]) == 518400){
            $interval = '周';
        }else{
            $interval = '月';
        }
        /*-----end-------*/
        //表头部分
        $phpExcel->getActiveSheet()->getColumnDimension('A1')->setAutoSize(true);
        $phpExcel->getActiveSheet()->getColumnDimension('A2')->setAutoSize(true);
        //合并单元格
        $phpExcel->getActiveSheet()->mergeCells('A1:A2');
        $phpExcel->getActiveSheet()->setCellValue('A1','时间');
        //垂直居中
        $phpExcel->getActiveSheet()->getStyle('A1')->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
        //水平居中
        $phpExcel->getActiveSheet()->getStyle('A1')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        $phpExcel->getActiveSheet()->getColumnDimension('B1')->setAutoSize(true);
        $phpExcel->getActiveSheet()->getColumnDimension('B2')->setAutoSize(true);
        $phpExcel->getActiveSheet()->mergeCells('B1:B2');
        $phpExcel->getActiveSheet()->setCellValue('B1','注册用户');
        $phpExcel->getActiveSheet()->getStyle('B1')->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
        $phpExcel->getActiveSheet()->getStyle('B1')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        //统计表头中用户留存含多少列
        $num = (count($user_data)-3);
        /*start---超过26列（字母序）A-ZAA-AZBA-BZ.....计算公式----*/
        $currentColumn = 'C';
        $row = [];
        for ($j = 1; $j <= $num; $j++) {
            $currentColumn++;
            $row[] = $currentColumn;
        }
        /*------end--------*/
        $phpExcel->getActiveSheet()->getColumnDimension("C1")->setAutoSize(true);
        $phpExcel->getActiveSheet()->mergeCells("C1:{$row[$num-2]}1");
        $phpExcel->getActiveSheet()->setCellValue('C1','用户留存');
        //水平居中
        $phpExcel->getActiveSheet()->getStyle('C1')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        //垂直居中
        $phpExcel->getActiveSheet()->getStyle('C1')->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
        $phpExcel->getActiveSheet()->getColumnDimension("C2")->setAutoSize(true);
        $phpExcel->getActiveSheet()->setCellValue('C2','1'."$interval".'后');
        $phpExcel->getActiveSheet()->getStyle('C2')->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        $phpExcel->getActiveSheet()->getStyle('C2')->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
        $last_row = array_pop($row);
        foreach ($row as $key => $val){
            $phpExcel->getActiveSheet()->getColumnDimension("{$val}2")->setAutoSize(true);
            $day = $key+2;
            $phpExcel->getActiveSheet()->setCellValue("{$val}2","$day"."$interval".'后');
            $phpExcel->getActiveSheet()->getStyle("{$val}2")->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
            $phpExcel->getActiveSheet()->getStyle("{$val}2")->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
        }
        $phpExcel->getActiveSheet()->getColumnDimension("{$last_row}1")->setAutoSize(true);
        $phpExcel->getActiveSheet()->mergeCells("{$last_row}1:{$last_row}2");
        $phpExcel->getActiveSheet()->setCellValue("{$last_row}1","$interval".'转化率');
        $phpExcel->getActiveSheet()->getStyle("{$last_row}1")->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
        $phpExcel->getActiveSheet()->getStyle("{$last_row}1")->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
        foreach ($data as $v){
            //数据导入
            $time = array_shift($v['data']);
            $phpExcel->getActiveSheet()->setCellValue("A".$i,$time);
            $phpExcel->getActiveSheet()->getStyle('A'.$i)->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
            $phpExcel->getActiveSheet()->getStyle('A'.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
            $regCount = array_shift($v['data']);
            $phpExcel->getActiveSheet()->setCellValue("B".$i,$regCount);
            $phpExcel->getActiveSheet()->getStyle('B'.$i)->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
            $phpExcel->getActiveSheet()->getStyle('B'.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
            $firstData = array_shift($v['data']);
            $phpExcel->getActiveSheet()->setCellValue("C".$i,$firstData);
            $phpExcel->getActiveSheet()->getStyle('C'.$i)->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
            $phpExcel->getActiveSheet()->getStyle('C'.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
            $last_data = array_pop($v['data']);
            $new_arr = array_combine($row,$v['data']);
            foreach ($new_arr as $k=>$value){
                $phpExcel->getActiveSheet()->setCellValue($k.$i,$value);
                $phpExcel->getActiveSheet()->getStyle($k.$i)->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
                $phpExcel->getActiveSheet()->getStyle($k.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
            }
            $phpExcel->getActiveSheet()->setCellValue($last_row.$i,$last_data);
            $phpExcel->getActiveSheet()->getStyle($last_row.$i)->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
            $phpExcel->getActiveSheet()->getStyle($last_row.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
            $i++;
        }
        vendor('PHPExcel.IOFactory');
        $phpExcel->createSheet();
        $WriterObj = \PHPExcel_IOFactory::createWriter($phpExcel,'Excel5');
        ob_end_clean();
        //本地保存路径
        $filename = md5(uniqid(microtime())).'.xls';
        header("Content-type:application/vnd.ms-excel;charset=gbk");
        header("Content-Disposition:filename=$filename");
        header('Cache-Control: max-age=0');
        //返回url提供页面下载
        $apiData['url'] = $this->saveExcelToLocalFile($WriterObj,$filename);
        //返回json数据
        $this->apiOut(0,$apiData);
    }
    function saveExcelToLocalFile($objWriter,$filename){
        //如果是线上环境,注意操作目录的权限
        $filePath = APP_PATH.'Runtime/Data/'.$filename;
        $objWriter->save($filePath);
        return $filePath;
    }
}    
前端下载的实现（js代码）：
<script>
    $(function{
        $('#button').click(function{
            $.ajax({
                type:'post',
                url:"{:U(dataDeal/load_excel)}",
                data:excelData,//表格数据,具体根据自己页面定义获取
                dataType:'json',
                success:function(data){
                    //请求成功
                    if(data.code == 0){
                        var loadUri = data.url.replace('./','/');
                        document.location.href =('http://example.com'+loadUri);
                    }
                }
            })
        })
    })
</script>