excel导入导出封装

public function excel_put(){
//先做一个文件上传，保存文件
$path=$_FILES['file'];
$filePath = "uploads/".$path["name"];
move_uploaded_file($path["tmp_name"],$filePath);
//默认用excel2007读取excel，若格式不对，则用之前的版本进行读取
//表格字段名字
$data=array('B'=>'name','C'=>'pwd','D'=>'money1','E'=>'salt');
$tablename='user1';//表名字
$this->excel_fileput($filePath,$data,$tablename);
}
private function excel_fileput($filePath,$data,$tablename){
$this->load->library("phpexcel");//ci框架中引入excel类
$PHPExcel = new PHPExcel();
$PHPReader = new PHPExcel_Reader_Excel2007();
if(!$PHPReader->canRead($filePath)){
$PHPReader = new PHPExcel_Reader_Excel5();
if(!$PHPReader->canRead($filePath)){
echo 'no Excel';
return ;
}
}
// 加载excel文件
$PHPExcel = $PHPReader->load($filePath);

// 读取excel文件中的第一个工作表
$currentSheet = $PHPExcel->getSheet(0);
// 取得最大的列号
$allColumn = $currentSheet->getHighestColumn();
// 取得一共有多少行
$allRow = $currentSheet->getHighestRow();

// 从第二行开始输出，因为excel表中第一行为列名
for($currentRow = 2;$currentRow <= $allRow;$currentRow++){
/**从第A列开始输出*/
//echo $allColumn;

for($currentColumn= 'A';$currentColumn<= $allColumn; $currentColumn++){
$val = $currentSheet->getCellByColumnAndRow(ord($currentColumn) - 65,$currentRow)->getValue();
//print_r($val);
//die;

if($currentColumn == 'A')
{
//echo $val."\t";
}else if($currentColumn <= $allColumn){
$data1[$currentColumn]=$val;
}
}
foreach($data as $key=>$val){
$data2[$val]=$data1[$key];
}
$this->db->insert($tablename,$data2);
//print_r($data2);
//echo "</br>";
}
//echo "\n";
echo "导入成功";
}

header("Content-type:application/vnd.ms-excel");
header("Content-Disposition:attachment;filename=123.xls");

$array=$this->db->get("shop_address")->result_array();
$str = "Id\tName\tPid\n";
foreach ($array as $val) {
$str .=  $val['id'] . "\t" .$val['name'] . "\t" . $val['pid'] . "\n";
}
echo $str;