1.类扩展包位置：

image.png

2.引用

/**
     *
     * 导出Excel
     */
    public function excel()
    {
        //引入PHPExcel库文件
        Vendor('phpexcel2.PHPExcel');
        //创建对象
        $excel = new \PHPExcel();
        //Excel表格式,这里简略写了8列
        $letter = array('A', 'B', 'C', 'D', 'E', 'F', 'F', 'G','H','I','J','k','L','M','N','O','P','Q','R','S');
        //表头数组
        $tableheader = array('序号', '资产编号', '设备名称', '主机名', '设备型号', '密级', '用途','密级编号', '所属部门', '放置地点', '责任人', '硬盘序列号', 'ip地址', 'MAC地址','操作系统', '安装时间', '启用时间', '使用情况', '是否需要制作保密标签','创建时间');
        //填充表头信息
        for ($i = 0; $i < count($tableheader); $i++) {
            $excel->getActiveSheet()->setCellValue("$letter[$i]1", "$tableheader[$i]");
        }
        //表格数组
        $data = array(
            array('1', 'B', 'C', 'D', 'E', 'F', 'G'),
            array('2', 'B', 'C', 'D', 'E', 'F', 'G'),
            array('3', 'B', 'C', 'D', 'E', 'F', 'G'),
            array('4', 'B', 'C', 'D', 'E', 'F', 'G'),
            array('5', 'B', 'C', 'D', 'E', 'F', 'G'),
            array('6', 'B', 'C', 'D', 'E', 'F', 'G'),
            array('7', 'B', 'C', 'D', 'E', 'F', 'G'),
        );
        $tz = M('taizhang');
        $data2 = $tz->field('type',true)->select();
        //print_r($data2);exit();
        //填充表格信息
        for ($i = 2; $i <= count($data2) + 1; $i++) {
            $j = 0;
            foreach ($data2[$i - 2] as $key => $value) {
                $excel->getActiveSheet()->setCellValue("$letter[$j]$i", "$value");
                $j++;
            }
        }
        //创建Excel输入对象
        $write = new \PHPExcel_Writer_Excel5($excel);
        header("Pragma: public");
        header("Expires: 0");
        header("Cache-Control:must-revalidate, post-check=0, pre-check=0");
        header("Content-Type:application/force-download");
        header("Content-Type:application/vnd.ms-execl");
        header("Content-Type:application/octet-stream");
        header("Content-Type:application/download");;
        header('Content-Disposition:attachment;filename="信息系统表.xlsx"');
        header("Content-Transfer-Encoding:binary");
        $write->save('php://output');
    }