实现代码：

private function exportExcel($params)

{

$arr = $this->getExportData($params); // 获取需要导出的信息(我这边是：二维数组)

$fileName = "5月文化衫信息采集表";

$xlsTitle = iconv('utf-8', 'gbk', "5月文化衫信息采集表"); //注意编码转换

require LIB_PATH . "application/library/PHPExcel/PHPExcel.php";

$objPHPExcel = new PHPExcel();

$objSheet = $objPHPExcel->getActiveSheet(); // 获取当前活动sheet

$objSheet->setTitle('5月文化衫信息采集表'); // 给当前的活动sheet起个名称

$objSheet->setCellValue('A1', '员工名');

$objSheet->setCellValue('B1', '工号');

$objSheet->setCellValue('C1', '一级部门');

$objSheet->setCellValue('D1', '二级部门');

$objSheet->setCellValue('E1', '衣服款式');

$objSheet->setCellValue('F1', '尺码');

$i = 2;

foreach ($arr as $key => $val) {

switch ($val['clothes_style']) {

case 1:

$val['clothes_style'] = '款式A';

break;

case 2:

$val['clothes_style'] = '款式B';

break;

}

switch ($val['clothes_size']) {

case 1:

$val['clothes_size'] = 'XS';

break;

case 2:

$val['clothes_size'] = 'S';

break;

case 3:

$val['clothes_size'] = 'M';

break;

case 4:

$val['clothes_size'] = 'L';

break;

case 5:

$val['clothes_size'] = 'XL';

break;

case 6:

$val['clothes_size'] = 'XXL';

break;

default:

$val['clothes_size'] = 'F';

break;

}

$objSheet->setCellValue('A' . $i, $val['user_id'])

->setCellValue('B' . $i, "4399XM-" . $val['empno'])

->setCellValue('C' . $i, $val['dept_id'])

->setCellValue('D' . $i, $val['job_id'])

->setCellValue('E' . $i, $val['clothes_style'])

->setCellValue('F' . $i, $val['clothes_size']);

$i++;

}

header('pragma:public');

header('Content-type:application/vnd.ms-excel;charset=utf-8;name="' . $xlsTitle . '.xlsx"');

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

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

header("Content-Type: application/force-download");

header("Content-Type: application/octet-stream");

header("Content-Type: application/download");

// $objWriter = new \PHPExcel_Writer_Excel2007($objPHPExcel);

$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');

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

exit;

}