摘要：
代码如下，从国外论坛上找到的$objPHPExcel-˃getDefaultStyle()-˃getAlignment()-˃setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);$objPHPExcel-˃getDefaultStyle()-˃getAlignment()-˃setVertical(PHPExcel_Style_Al
代码如下，从国外论坛上找到的
$objPHPExcel->getDefaultStyle()->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER); $objPHPExcel->getDefaultStyle()->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_CENTER);
方法来自：http://stackoverflow.com/questions/12614864/phpexcel-how-to-apply-alignment-for-the-whole-document-created-from-mysql-table