Codeigniter使用phpexcel

1. 去 http://phpexcel.codeplex.com/ 下载phpexcel源码，解压缩后把phpexcel/Classes里的PHPExcel文件夹和PHPExcel.php复制到CI的application/libraries文件夹内。目录结构如下：

---application/libraries/PHPExcel.php

---application/libraries/PHPExcel(文件夹)

2. 修改application/libraries/PHPExcel/IOFactory.php文件：将其类名从PHPExcel_IOFactory改为IOFactory，遵从CI类命名规则；将其构造函数改为public

3. 在CI内phpexcel的使用：

//加载PHPExcel的类

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

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

//创建PHPExcel实例

$excel = new PHPExcel();

//下面介绍项目中用到的几个关于excel的操作

//为单元格赋值

$excel->getActiveSheet()->setCellValue('A1','aaa');

//合并单元格

$excel->getActiveSheet()->mergeCells('A1:A2');

//设置单元格内文字垂直居中

$excel->getActiveSheet()->getStyle('A1')->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_CENTER);

//设置单元格内文字自动换行

$excel->getActiveSheet()->getStyle('A1')->getAlignment()->setWrapText(true);

//为单元格添加注释

$excel->getActiveSheet()->getComment('A1')->getText()->createTextRun('hello');

//设置单元格文字颜色

$excel->getActiveSheet()->getStyle('A1')->getFont()->getColor->setARGB(PHPExcel_Style_Color::COLOR_RED);

//输出到浏览器

$write = new PHPExcel_Writer_Excel2007($excel);

header("Pragma: public");

header("Expires: 0");

header("Cache-Control:must-revalidate, post-check=0, pre-check=0");

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

header("Content-Type:application/vnd.ms-execl");

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

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

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

header("Content-Transfer-Encoding:binary");

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