<?php 	require dirname(__FILE__)."/dbconfig.php";//引入配置文件	class db{		public $conn=null;		public function __construct($config){//构造方法 实例化类时自动调用 				$this->conn=mysql_connect($config[‘host‘],$config[‘username‘],$config[‘password‘]) or die(mysql_error());//连接数据库				mysql_select_db($config[‘database‘],$this->conn) or die(mysql_error());//选择数据库				mysql_query("set names ".$config[‘charset‘]) or die(mysql_error());//设定mysql编码		}		/**		**根据传入sql语句 查询mysql结果集		**/		public function getResult($sql){			$resource=mysql_query($sql,$this->conn) or die(mysql_error());//查询sql语句			$res=array();			while(($row=mysql_fetch_assoc($resource))!=false){				$res[]=$row;			}			return $res;		}		/**		** 根据传入年级数 查询每个年级的学生数据		**/		public function getDataByGrade($grade){			$sql="select username,score,class from user where grade=".$grade." order by score desc";			$res=self::getResult($sql);			return $res;		}		/**		** 查询所有的年级		**/		public function getAllGrade(){			$sql="select distinct(grade) from user  order by grade asc";			$res=$this->getResult($sql);			return $res;		}		/**		**根据年级数查询所有的班级		**/		public function getClassByGrade($grade){			$sql="select distinct(class) from user where grade=".$grade." order by class asc";			$res=$this->getResult($sql);			return $res;		}		/**		**根据年级数班级数查询学生信息		**/		public function getDataByClassGrade($class,$grade){			$sql="select username,score from user where class=".$class." and grade=".$grade." order by score desc";			$res=$this->getResult($sql);			return $res;		}	}?>

<?php 	$phpexcel=array(			‘host‘=>"127.0.0.1",			"username"=>"root",			"password"=>"",			"database"=>"phpexcel",			"charset"=>"utf8"	);?>

<?php 	$dir=dirname(__FILE__);//查找当前脚本所在路径	require $dir."/db.php";//引入mysql操作类文件	require $dir."./PHPExcel.php";//引入PHPExcel	$db=new db($phpexcel);//实例化db类 连接数据库	$objPHPExcel=new PHPExcel();//实例化PHPExcel类， 等同于在桌面上新建一个excel	for($i=1;$i<=3;$i++){		if($i>1){			$objPHPExcel->createSheet();//创建新的内置表		}		$objPHPExcel->setActiveSheetIndex($i-1);//把新创建的sheet设定为当前活动sheet		$objSheet=$objPHPExcel->getActiveSheet();//获取当前活动sheet		$objSheet->setTitle($i."年级");//给当前活动sheet起个名称		$data=http://www.mamicode.com/$db->getDataByGrade($i);//查询每个年级的学生数据"A1","姓名")->setCellValue("B1","分数")->setCellValue("C1","班级");//填充数据		$j=2;		foreach($data as $key=>$val){				$objSheet->setCellValue("A".$j,$val[‘username‘])->setCellValue("B".$j,$val[‘score‘])->setCellValue("C".$j,$val[‘class‘]."班");				$j++;		}	}	$objWriter=PHPExcel_IOFactory::createWriter($objPHPExcel,‘Excel5‘);//生成excel文件	//$objWriter->save($dir."/export_1.xls");//保存文件	browser_export(‘Excel5‘,‘browser_excel03.xls‘);//输出到浏览器	$objWriter->save("php://output");	function browser_export($type,$filename){		if($type=="Excel5"){				header(‘Content-Type: application/vnd.ms-excel‘);//告诉浏览器将要输出excel03文件		}else{				header(‘Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet‘);//告诉浏览器数据excel07文件		}		header(‘Content-Disposition: attachment;filename="‘.$filename.‘"‘);//告诉浏览器将输出文件的名称		header(‘Cache-Control: max-age=0‘);//禁止缓存	}?>