phpExcel输出xls文档显示乱码的解决方法

$filename = urlencode("个税表.xls");
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename='.$filename);
header('Cache-Control: max-age=0');
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5'); 
$objWriter->save('php://output'); 

$filename = urlencode("个税表.xls");
ob_end_clean();
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename='.$filename);
header('Cache-Control: max-age=0');
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5'); 
$objWriter->save('php://output');