这次跟大家聊聊j如何用PHP自定义Excel的导出及合并单元格，下面就是实战案例，一起来看一下。
首先自定义导出，我用的是一个下拉多选框的一个插件，百度一下就可找到，为了样式好看。如图
value值对应的是你数据库中查出的字段值，text对应的是你的表头信息。ok，然后我是通过GET把这俩个值传到我们控制器的。
引入导出类，这个就不多说。
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然后就是查询数据库，把数据处理成一个二维数组，进行循环遍历输出在表格中
我的数据格式是1对多的关系，一个班主任对应多个班级，那么我要在表格中合并这个班主任,$count是对班级的统计，当班主任
对应的班级数量>1时，才合并。
$str=$_GET['str'];//勾选
$str2=$_GET['str2'];//表头
$td_field=explode(',', $str2);//表头
$field=explode(',', $str);//勾选
$objPHPExcel=new \PHPExcel();
$objPHPExcel->getProperties()->setCreator('http://www.jb51.NET')
->setLastModifiedBy('http://www.jb51.Net')
->setTitle('Office 2007 XLSX Document')
->setSubject('Office 2007 XLSX Document')
->setDescription('Document for Office 2007 XLSX, generated using PHP classes.')
->setKeywords('office 2007 openxml php')
->setCategory('Result file');
$objPHPExcel->setActiveSheetIndex(0)
->setCellValue('A1',$td_field[0])
->setCellValue('B1',$td_field[1])
->setCellValue('C1',$td_field[2])
->setCellValue('D1',$td_field[3])
->setCellValue('E1',$td_field[4])
->setCellValue('F1',$td_field[5])
->setCellValue('G1',$td_field[6])
->setCellValue('H1',$td_field[7])
->setCellValue('I1',$td_field[8])
->setCellValue('J1',$td_field[9])
->setCellValue('K1',$td_field[10])
->setCellValue('L1',$td_field[11])
->setCellValue('M1',$td_field[12]);
$i=2;
//->mergeCells('A18:E22')合并单元格；->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_CENTER) 垂直居中
foreach($new_array as $k=>$v){
if($v["count"] > 1){
$objPHPExcel->setActiveSheetIndex(0)
->setCellValue('A'.$i,$v["$field[0]"])
->setCellValue('B'.$i,$v["$field[1]"])
->setCellValue('C'.$i,$v["$field[2]"])
->setCellValue('D'.$i,$v["$field[3]"])
->setCellValue('E'.$i,$v["$field[4]"])
->setCellValue('F'.$i,$v["$field[5]"])
->setCellValue('G'.$i,$v["$field[6]"])
->setCellValue('H'.$i,$v["$field[7]"])
->setCellValue('I'.$i,$v["$field[8]"])
->setCellValue('J'.$i,$v["$field[9]"])
->setCellValue('K'.$i,$v["$field[10]"])
->setCellValue('L'.$i,$v["$field[11]"])
->setCellValue('M'.$i,$v["$field[12]"])
->mergeCells('A'.$i.':A'.($i+$v["count"]-1))
->mergeCells('B'.$i.':B'.($i+$v["count"]-1))
->mergeCells('C'.$i.':C'.($i+$v["count"]-1))
->mergeCells('D'.$i.':D'.($i+$v["count"]-1))
->mergeCells('E'.$i.':E'.($i+$v["count"]-1))
->mergeCells('F'.$i.':F'.($i+$v["count"]-1))
->mergeCells('G'.$i.':G'.($i+$v["count"]-1))
->mergeCells('H'.$i.':H'.($i+$v["count"]-1))
->mergeCells('I'.$i.':I'.($i+$v["count"]-1));
$objPHPExcel->setActiveSheetIndex(0)->getStyle('A'.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
$objPHPExcel->setActiveSheetIndex(0)->getStyle('B'.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
$objPHPExcel->setActiveSheetIndex(0)->getStyle('C'.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
$objPHPExcel->setActiveSheetIndex(0)->getStyle('D'.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
$objPHPExcel->setActiveSheetIndex(0)->getStyle('E'.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
$objPHPExcel->setActiveSheetIndex(0)->getStyle('F'.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
$objPHPExcel->setActiveSheetIndex(0)->getStyle('G'.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
$objPHPExcel->setActiveSheetIndex(0)->getStyle('H'.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
$objPHPExcel->setActiveSheetIndex(0)->getStyle('I'.$i)->getAlignment()->setVertical(\PHPExcel_Style_Alignment::VERTICAL_CENTER);
}else{
$objPHPExcel->setActiveSheetIndex(0)
->setCellValue('A'.$i,$v["$field[0]"])
->setCellValue('B'.$i,$v["$field[1]"])
->setCellValue('C'.$i,$v["$field[2]"])
->setCellValue('D'.$i,$v["$field[3]"])
->setCellValue('E'.$i,$v["$field[4]"])
->setCellValue('F'.$i,$v["$field[5]"])
->setCellValue('G'.$i,$v["$field[6]"])
->setCellValue('H'.$i,$v["$field[7]"])
->setCellValue('I'.$i,$v["$field[8]"])
->setCellValue('J'.$i,$v["$field[9]"])
->setCellValue('K'.$i,$v["$field[10]"])
->setCellValue('L'.$i,$v["$field[11]"])
->setCellValue('M'.$i,$v["$field[12]"]);
}
$i++;
}
$objPHPExcel->getActiveSheet()->setTitle('日报');
$objPHPExcel->setActiveSheetIndex(0);
//$filename=urlencode('数据表').'_'.date('Y-m-dHis');
$filename='日报'.'_'.date('Y-m-dHis');
//生成xls文件
header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="'.$filename.'.xls"');
header('Cache-Control: max-age=0');
$objWriter = \PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
$objWriter->save('php://output');
exit; 
