class Admin_list extends CI_Controller {

function __construct(){

parent::__construct();

      $this->load->library('session');

      $this->load->library('PHPExcel');

      //$this->load->library('PHPExcel/IOFactory');（方法中不用导入这个文件夹）

$this->load->model('admin_model');

}

//导出excel

    public function export_excel(){

        /** Error reporting */

        error_reporting(E_ALL);

        ini_set('display_errors', TRUE);

        ini_set('display_startup_errors', TRUE);

        date_default_timezone_set('Europe/London');

        if (PHP_SAPI == 'cli')

            die('This example should only be run from a Web Browser');

// Create new PHPExcel object

        $objPHPExcel = new PHPExcel();

// Set document properties

        $objPHPExcel->getProperties()->setCreator("Maarten Balliauw")

            ->setLastModifiedBy("Maarten Balliauw")

            ->setTitle("Office 2007 XLSX Test Document")

            ->setSubject("Office 2007 XLSX Test Document")

            ->setDescription("Test document for Office 2007 XLSX, generated using PHP classes.")

            ->setKeywords("office 2007 openxml php")

            ->setCategory("Test result file");

// Add some data

        $objPHPExcel->setActiveSheetIndex(0)

            ->setCellValue('A1', 'Hello')

            ->setCellValue('B2', 'world!')

            ->setCellValue('C1', 'Hello')

            ->setCellValue('D2', 'world!');

// Miscellaneous glyphs, UTF-8

        $objPHPExcel->setActiveSheetIndex(0)

            ->setCellValue('A4', 'Miscellaneous glyphs')

            ->setCellValue('A5', 'éàèùâêîôûëïüÿäöüç');

// Rename worksheet

        $objPHPExcel->getActiveSheet()->setTitle('Simple');

// Set active sheet index to the first sheet, so Excel opens this as the first sheet

        $objPHPExcel->setActiveSheetIndex(0);

// Redirect output to a client’s web browser (Excel2007)

        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');

        header('Content-Disposition: attachment;filename="01simple.xlsx"');

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

// If you're serving to IE 9, then the following may be needed

        header('Cache-Control: max-age=1');

// If you're serving to IE over SSL, then the following may be needed

        header ('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past

        header ('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT'); // always modified

        header ('Cache-Control: cache, must-revalidate'); // HTTP/1.1

        header ('Pragma: public'); // HTTP/1.0

        $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');

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

}

}