/**
     * 将数据导出到Excel
     */
    public function actionExport()
    {
        //取要导出到Excel的数据
        $criteria = $this->_getCriteria();
        $data = Statistics::model()->findAll($criteria);// 获取PHPExcel引用路径
        $phpExcelPath = Yii::getPathOfAlias('system.vendors');// 关闭YII的自动加载功能，改用手动加载，否则会出错，PHPExcel有自己的自动加载功能
        // YII框架对于组件的自动加载，要求类名与文件名一致；
        // 而PHPExcel类对应的文件名包含了上级目录名称，如：IOFactory类对应的文件名为PHPExcel_IOFactory.php
        spl_autoload_unregister(array('YiiBase','autoload'));
        include($phpExcelPath . DIRECTORY_SEPARATOR . 'PHPExcel.php');//下面是Excel数据导出处理逻辑
        $objPHPExcel = PHPExcel_IOFactory::load('./content/template/report.xlsx');$objPHPExcel->getProperties()->setCreator("Kalman")
        ->setTitle("统计报表")
        ->setSubject("统计报表")
        ->setDescription("统计报表");$objPHPExcel->setActiveSheetIndex(0)
        ->setCellValue('A1', 'Hello')
        ->setCellValue('B2', 'world!')
        ->setCellValue('C1', 'Hello')
        ->setCellValue('D2', 'world!');$objPHPExcel->setActiveSheetIndex(0)
        ->setCellValue('A25', '123456');$objPHPExcel->getActiveSheet()->setTitle('report');// Excel打开后显示的工作表
        $objPHPExcel->setActiveSheetIndex(0);//通浏览器输出Excel报表
        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
        header('Content-Disposition: attachment;filename="report.xlsx"');
        header('Cache-Control: max-age=0');$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
        $objWriter->save('php://output');
        Yii::app()->end();//恢复Yii自动加载功能
        spl_autoload_register(array('YiiBase','autoload'));
    }