mysql表结构
导出各班成绩到不同sheet表
public function testPHPExcel(){
set_time_limit(0);//防止超时
ini_set("memory_limit","512M");//防止内存过大
//加载PHPExcel的类
$this->load->library('PHPExcel');
$this->load->library('PHPExcel/IOFactory');
//创建PHPExcel实例
$excel = new PHPExcel();
/*获取数据库数据*/
$banji = $this->db->select('BanJi')->group_by('BanJi')->get('chengji_xuexiao_wenke')->result_array();
foreach ($banji as $key => $vbj) {
if($key !== 0) $excel->createSheet();
$excel->setactivesheetindex($key);
/** 设置工作表名称 */
$excel->getActiveSheet($key)->setTitle($vbj['BanJi']);
//下面介绍项目中用到的几个关于excel的操作
$charActors = array('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'); //用到的列
$widthSize = array(5, 10, 10, 10, 5,5,10,10,5,10,10,5,10,10,5,10,10,5,10,10,5,10,10,5,10,10); //列宽
$titleName = array('姓名', '考号', '学号','学校','班级','总分','总分联考排名','总分学校排名','语文','语文联考排名','语文学校排名','数学','数学联考排名','数学学校排名','英语','英语联考排名','英语学校排名','政治','政治联考排名','政治学校排名','历史','历史联考排名','历史学校排名','地理','地理联考排名','地理学校排名');
//写入表头
foreach ($charActors as $k => $v) {
//加粗
$excel->getActiveSheet()->getStyle('A1:Z1')->getFont()->setBold(true);
//对齐方式，水平居中
$excel->getActiveSheet()->getStyle('A1:Z1')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
$excel->getActiveSheet()->getStyle($v)->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
//设置表格宽度
$excel->getActiveSheet()->getColumnDimension($v)->setWidth($widthSize[$k]);
//设置单元格为文本
$excel->getActiveSheet()->getStyle($v)->getNumberFormat()->setFormatCode(PHPExcel_Style_NumberFormat::FORMAT_TEXT);
//为单元格赋值
$excel->getActiveSheet()->setCellValue($v . 1, $titleName[$k]);
}
$xuexiao = $this->db->where('BanJi',$vbj['BanJi'])->get('chengji_xuexiao_wenke')->result_array();
$hangshu = 2;//从第二行开始写入数据 行数
//p($xuexiao);
foreach ($xuexiao as $vxx) {
$excel->getActiveSheet()->setCellValue('A' . $hangshu, $vxx['XingMing']);
$excel->getActiveSheet()->setCellValue('B' . $hangshu, $vxx['KaoHao']);
$excel->getActiveSheet()->setCellValue('C' . $hangshu, $vxx['XueHao']);
$excel->getActiveSheet()->setCellValue('D' . $hangshu, $vxx['XueXiao']);
$excel->getActiveSheet()->setCellValue('E' . $hangshu, $vxx['BanJi']);
$excel->getActiveSheet()->setCellValue('F' . $hangshu, $vxx['ZongFen']);
$excel->getActiveSheet()->setCellValue('G' . $hangshu, $vxx['ZongFenLianKaoPaiMing']);
$excel->getActiveSheet()->setCellValue('H' . $hangshu, $vxx['ZongFenXueXiaoPaiMing']);
$excel->getActiveSheet()->setCellValue('I' . $hangshu, $vxx['YuWen']);
$excel->getActiveSheet()->setCellValue('J' . $hangshu, $vxx['YuWenLianKaoPaiMing']);
$excel->getActiveSheet()->setCellValue('K' . $hangshu, $vxx['YuWenXueXiaoPaiMing']);
$excel->getActiveSheet()->setCellValue('L' . $hangshu, $vxx['ShuXue']);
$excel->getActiveSheet()->setCellValue('M' . $hangshu, $vxx['ShuXueLianKaoPaiMing']);
$excel->getActiveSheet()->setCellValue('N' . $hangshu, $vxx['ShuXueXueXiaoPaiMing']);
$excel->getActiveSheet()->setCellValue('O' . $hangshu, $vxx['YingYu']);
$excel->getActiveSheet()->setCellValue('P' . $hangshu, $vxx['YingYuLianKaoPaiMing']);
$excel->getActiveSheet()->setCellValue('Q' . $hangshu, $vxx['YingYuXueXiaoPaiMing']);
$excel->getActiveSheet()->setCellValue('R' . $hangshu, $vxx['ZhengZhi']);
$excel->getActiveSheet()->setCellValue('S' . $hangshu, $vxx['ZhengZhiLianKaoPaiMing']);
$excel->getActiveSheet()->setCellValue('T' . $hangshu, $vxx['ZhengZhiXueXiaoPaiMing']);
$excel->getActiveSheet()->setCellValue('U' . $hangshu, $vxx['LiShi']);
$excel->getActiveSheet()->setCellValue('V' . $hangshu, $vxx['LiShiLianKaoPaiMing']);
$excel->getActiveSheet()->setCellValue('W' . $hangshu, $vxx['LiShiXueXiaoPaiMing']);
$excel->getActiveSheet()->setCellValue('X' . $hangshu, $vxx['DiLi']);
$excel->getActiveSheet()->setCellValue('Y' . $hangshu, $vxx['DiLiLianKaoPaiMing']);
$excel->getActiveSheet()->setCellValue('Z' . $hangshu, $vxx['DiLiXueXiaoPaiMing']);
$hangshu++;
}
}
//输出
$excel->setactivesheetindex(0);/** 设置第一个工作表为活动工作表 */
$write = new PHPExcel_Writer_Excel2007($excel);
$file_name = '文科各班成绩表';
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="' . $file_name . '.xlsx"');
header("Content-Transfer-Encoding:binary");
$write->save('php://output');
}附：可能出现超时和内存过大情况
Maximum execution time of 30 seconds exceeded，
简单总结一下解决办法：
报错一：内存超限，具体报错语句忘了，简单说一下解决办法。
利用循环分批导入；
每个循环内部开始处使用sleep(5);语句，做延迟执行，防止服务器内存同一时间占用过多，里面数字据情况修改；
每个循环内部结束地方使用 ob_flush();刷新输出缓冲
flush();将当前为止程序的所有输出发送到用户的浏览器
两者必须同时使用来刷新输出缓冲
报错二：30秒运行超时的错误（Maximum execution time of 30 seconds exceeded）
解决办法：
方法一，修改php.ini文件
max_execution_time = 30; Maximum execution time of each script, in seconds
把它设置成需要的值就可以了。如果设置成0的话，就是永不过期。
方法二，修改php执行文件（推荐）
加上
<?
set_time_limit(0);
?>
max_execution_time = 30; Maximum execution time of each script, in seconds
把它设置成需要的值就可以了。如果设置成0的话，就是永不过期。
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 24 bytes) in
出现该错误的原因：
是因为php页面消耗的最大内存默认是为 8M (在PHP的ini件里可以看到) ,如果文件太大 或图片太大 在读取的时候 会发生上述错误。
解决办法：
1，修改 php.ini
将memory_limit由 8M 改成 16M（或更大），重启apache服务
2，在PHP 文件中 加入 ini_set(”memory_limit”,”100M”);（推荐）
注意:为了系统的其它资源的正常使用 请您不要将 memory_limit设置太大，其中-1为不限
3，修改.htaccess 文档（前提是该目录支持.htaccess）
在文档中新增一句：php_value memory_limit 16M(或更大)
导入
public function daoruwen(){
set_time_limit(0);//防止超时
ini_set("memory_limit","512M");//防止内存过大
//处理上传的文件
$config['upload_path'] = './';
$config['allowed_types'] = 'xls';
$config['max_size'] = '200000';
$config['max_width'] = '2000';//1280*407
$config['max_height'] = '2000';
$config['max_filename'] = '40';
$config['encrypt_name'] = false;
$this->load->library('upload',$config);
if ( ! $this->upload->do_upload('myfile')){
/*p($this->upload->display_errors());*/
echo "<script>alert('文件上传不成功!');window.history.back(-1)</script>";
}else{
//上传成功后处理
$filedata = $this->upload->data();
$filename = $filedata['file_name'];
//$filePath = base_url().'public/'.$filename;
$filePath = $filename;
$this->load->library('PHPExcel');
$this->load->library('PHPExcel/IOFactory');
//创建PHPExcel实例
$excel = new PHPExcel();
$objReader = IOFactory::createReader('Excel5');//use excel2007 for 2007 format
$objPHPExcel = $objReader->load($filePath); //$filename可以是上传的文件，或者是指定的文件
$sheet = $objPHPExcel->getSheet(0);
$highestRow = $sheet->getHighestRow(); // 取得总行数
$highestColumn = $sheet->getHighestColumn(); // 取得总列数
//$k = 0;
//循环读取excel文件,读取一条,插入一条
for($rowCurrent=2;$rowCurrent<=$highestRow;$rowCurrent++)
{
$a = $objPHPExcel->getActiveSheet()->getCell("A".$rowCurrent)->getValue();//获取A列的值
$b = $objPHPExcel->getActiveSheet()->getCell("B".$rowCurrent)->getValue();//获取B列的值
$c = $objPHPExcel->getActiveSheet()->getCell("C".$rowCurrent)->getValue();//获取C列的值
$d = $objPHPExcel->getActiveSheet()->getCell("D".$rowCurrent)->getValue();//获取D列的值
$e = $objPHPExcel->getActiveSheet()->getCell("E".$rowCurrent)->getValue();//获取A列的值
$f = $objPHPExcel->getActiveSheet()->getCell("F".$rowCurrent)->getValue();//获取B列的值
$g = $objPHPExcel->getActiveSheet()->getCell("G".$rowCurrent)->getValue();//获取C列的值
$h = $objPHPExcel->getActiveSheet()->getCell("H".$rowCurrent)->getValue();//获取D列的值
$i = $objPHPExcel->getActiveSheet()->getCell("I".$rowCurrent)->getValue();//获取A列的值
$j = $objPHPExcel->getActiveSheet()->getCell("J".$rowCurrent)->getValue();//获取B列的值
$k = $objPHPExcel->getActiveSheet()->getCell("K".$rowCurrent)->getValue();//获取C列的值
$l = $objPHPExcel->getActiveSheet()->getCell("L".$rowCurrent)->getValue();//获取D列的值
$m = $objPHPExcel->getActiveSheet()->getCell("M".$rowCurrent)->getValue();//获取A列的值
$n = $objPHPExcel->getActiveSheet()->getCell("N".$rowCurrent)->getValue();//获取B列的值
$o = $objPHPExcel->getActiveSheet()->getCell("O".$rowCurrent)->getValue();//获取C列的值
$p = $objPHPExcel->getActiveSheet()->getCell("P".$rowCurrent)->getValue();//获取D列的值
$q = $objPHPExcel->getActiveSheet()->getCell("Q".$rowCurrent)->getValue();//获取A列的值
$r = $objPHPExcel->getActiveSheet()->getCell("R".$rowCurrent)->getValue();//获取B列的值
$s = $objPHPExcel->getActiveSheet()->getCell("S".$rowCurrent)->getValue();//获取C列的值
$t = $objPHPExcel->getActiveSheet()->getCell("T".$rowCurrent)->getValue();//获取D列的值
$u = $objPHPExcel->getActiveSheet()->getCell("U".$rowCurrent)->getValue();//获取A列的值
$v = $objPHPExcel->getActiveSheet()->getCell("V".$rowCurrent)->getValue();//获取B列的值
$w = $objPHPExcel->getActiveSheet()->getCell("W".$rowCurrent)->getValue();//获取C列的值
$x = $objPHPExcel->getActiveSheet()->getCell("X".$rowCurrent)->getValue();//获取D列的值
$y = $objPHPExcel->getActiveSheet()->getCell("Y".$rowCurrent)->getValue();//获取C列的值
$z = $objPHPExcel->getActiveSheet()->getCell("Z".$rowCurrent)->getValue();//获取D列的值
$this->db->insert('chengji_quanshi_wenke',array('XingMing'=>$a,'KaoHao'=>$b,'XueHao'=>$c,'XueXiao'=>$d,'BanJi'=>$e,'ZongFen'=>$f,'ZongFenLianKaoPaiMing'=>$g,'ZongFenXueXiaoPaiMing'=>$h,'YuWen'=>$i,'YuWenLianKaoPaiMing'=>$j,'YuWenXueXiaoPaiMing'=>$k,'ShuXue'=>$l,'ShuXueLianKaoPaiMing'=>$m,'ShuXueXueXiaoPaiMing'=>$n,'YingYu'=>$o,'YingYuLianKaoPaiMing'=>$p,'YingYuXueXiaoPaiMing'=>$q,'ZhengZhi'=>$r,'ZhengZhiLianKaoPaiMing'=>$s,'ZhengZhiXueXiaoPaiMing'=>$t,'LiShi'=>$u,'LiShiLianKaoPaiMing'=>$v,'LiShiXueXiaoPaiMing'=>$w,'DiLi'=>$x,'DiLiLianKaoPaiMing'=>$y,'DiLiXueXiaoPaiMing'=>$z));
}
success('导入成功！',site_url('home/showquanshiwen'));
}