为什么使用PHPExcel在万网服务器下载会出现乱码

function export(){

$data=!empty($_POST) ? $_POST : $_GET;
$ser="";
$where=array("name"=>"%{$_POST["name"]}%","tel"=>"%{$_POST["tel"]}%","kemu"=>"%{$_POST["kemu"]}%");
//$where=array();



if(!empty($data["chenggong"])){
$ser.="/chenggong/{$data["chenggong"]}";
$where["chenggong"]=$data["chenggong"];
}

if(!empty($data["start"])){
$ser.="/start/{$data["start"]}";
$where["start"]=$data["start"];
}

      if(!empty($data["tuijianschool"])){
$ser.="/tuijianschool/{$data["tuijianschool"]}";
$where["tuijianschool"]=$data["tuijianschool"];
}
 if(!empty($data["banbie"])){
$ser.="/banbie/{$data["banbie"]}";
$where["banbie"]=$data["banbie"];
}


                        
                   $model=D("content");
 $OrdersData=$model->where($where)->order('start desc')->limit($page->limit)->select();
                
 
 
 
 
 
                
               
     include "classes/PHPExcel.php";
     
     
        
        // Create new PHPExcel object   
        $objPHPExcel=new PHPExcel();  
        
      
             
        
        
        // Set properties   
        $objPHPExcel->getProperties()->setCreator("ctos")  
            ->setLastModifiedBy("ctos")  
            ->setTitle("Office 2007 XLSX Test Document")  
            ->setSubject("Office 2007 XLSX Test Document")  
            ->setDescription("Test document for Office 2007 XLSX, generated using PHP classes.")  
            ->setKeywords("office 2007 openxml php")  
            ->setCategory("Test result file");  
  
        //set width   
        $objPHPExcel->getActiveSheet()->getColumnDimension('A')->setWidth(15);  
        $objPHPExcel->getActiveSheet()->getColumnDimension('B')->setWidth(12);  
        $objPHPExcel->getActiveSheet()->getColumnDimension('C')->setWidth(15);  
        $objPHPExcel->getActiveSheet()->getColumnDimension('D')->setWidth(12);  
        $objPHPExcel->getActiveSheet()->getColumnDimension('E')->setWidth(15);  
        $objPHPExcel->getActiveSheet()->getColumnDimension('F')->setWidth(10);  
        $objPHPExcel->getActiveSheet()->getColumnDimension('G')->setWidth(15);  
        $objPHPExcel->getActiveSheet()->getColumnDimension('H')->setWidth(12);  
        $objPHPExcel->getActiveSheet()->getColumnDimension('I')->setWidth(12);  
        $objPHPExcel->getActiveSheet()->getColumnDimension('J')->setWidth(10);  
        //$objPHPExcel->getActiveSheet()->getColumnDimension('K')->setWidth(10); 
  
        //设置行高度   
        $objPHPExcel->getActiveSheet()->getRowDimension('1')->setRowHeight(22);  
  
        $objPHPExcel->getActiveSheet()->getRowDimension('2')->setRowHeight(20);  
  
        //set font size bold   
        $objPHPExcel->getActiveSheet()->getDefaultStyle()->getFont()->setSize(10);  
        $objPHPExcel->getActiveSheet()->getStyle('A2:J2')->getFont()->setBold(true);  
  
        $objPHPExcel->getActiveSheet()->getStyle('A2:J2')->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_CENTER);  
        $objPHPExcel->getActiveSheet()->getStyle('A2:J2')->getBorders()->getAllBorders()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN);  
  
        //设置水平居中   
        $objPHPExcel->getActiveSheet()->getStyle('A1')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_LEFT);  
        $objPHPExcel->getActiveSheet()->getStyle('A')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);  
        $objPHPExcel->getActiveSheet()->getStyle('B')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);  
        $objPHPExcel->getActiveSheet()->getStyle('D')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);  
        $objPHPExcel->getActiveSheet()->getStyle('F')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);  
        $objPHPExcel->getActiveSheet()->getStyle('G')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);  
        $objPHPExcel->getActiveSheet()->getStyle('H')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);  
        $objPHPExcel->getActiveSheet()->getStyle('I')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER);  
         //  $objPHPExcel->getActiveSheet()->getStyle('K')->getAlignment()->setHorizontal(PHPExcel_Style_Alignment::HORIZONTAL_CENTER); 
          
        $objPHPExcel->getActiveSheet()->mergeCells('A1:J1');  
  
        // set table header content   
        $objPHPExcel->setActiveSheetIndex(0)  
            ->setCellValue('A1',iconv("UTF-8", "UTF-8",'邦杰外语课程汇总  时间:'.date('Y-m-d H:i:s')))  
            ->setCellValue('A2',iconv("UTF-8", "UTF-8",'咨询日期')) 
            ->setCellValue('B2',iconv("UTF-8", "UTF-8",'科目'))  
            ->setCellValue('C2',iconv("UTF-8", "UTF-8",'课程级别'))  
            ->setCellValue('D2',iconv("UTF-8", "UTF-8",'班别'))  
            ->setCellValue('E2',iconv("UTF-8", "UTF-8",'学员姓名'))  
            ->setCellValue('F2',iconv("UTF-8", "UTF-8",'性别'))  
            ->setCellValue('G2',iconv("UTF-8", "UTF-8",'学员手机'))  
            ->setCellValue('H2',iconv("UTF-8", "UTF-8",'推荐校区'))  
            ->setCellValue('I2',iconv("UTF-8", "UTF-8",'接电员码'))  
            ->setCellValue('J2',iconv("UTF-8", "UTF-8",'联系状态'));
           // ->setCellValue('K2', '接电员码');
  
        // Miscellaneous glyphs, UTF-8   
        for($i=0;$i<count($OrdersData)-1;$i++){  
            $objPHPExcel->getActiveSheet(0)->setCellValue('A'.($i+3), iconv("UTF-8", "UTF-8",$OrdersData[$i]['start']));  
            $objPHPExcel->getActiveSheet(0)->setCellValue('B'.($i+3), iconv("UTF-8", "UTF-8",$OrdersData[$i]['kemu']));  
            $objPHPExcel->getActiveSheet(0)->setCellValue('C'.($i+3), iconv("UTF-8", "UTF-8",$OrdersData[$i]['jibie']));  
            $objPHPExcel->getActiveSheet(0)->setCellValue('D'.($i+3), iconv("UTF-8", "UTF-8",$OrdersData[$i]['banbie']));  
            $objPHPExcel->getActiveSheet(0)->setCellValue('E'.($i+3), iconv("UTF-8", "UTF-8",$OrdersData[$i]['name']));  
            $objPHPExcel->getActiveSheet(0)->setCellValue('F'.($i+3), iconv("UTF-8", "UTF-8",$OrdersData[$i]['sex']));  
            $objPHPExcel->getActiveSheet(0)->setCellValue('G'.($i+3), iconv("UTF-8", "UTF-8",$OrdersData[$i]['tel']));  
            $objPHPExcel->getActiveSheet(0)->setCellValue('H'.($i+3), iconv("UTF-8", "UTF-8",$OrdersData[$i]['tuijianschool']));  
            $objPHPExcel->getActiveSheet(0)->setCellValue('I'.($i+3), iconv("UTF-8", "UTF-8",$OrdersData[$i]['jiedianhua']));  
            $objPHPExcel->getActiveSheet(0)->setCellValue('J'.($i+3), iconv("UTF-8", "UTF-8",$OrdersData[$i]['chenggong'])); 
           // $objPHPExcel->getActiveSheet(0)->setCellValue('K'.($i+3), $OrdersData[$i]['chenggong']);  
          // $objPHPExcel->getActiveSheet()->getStyle('A'.($i+3).':K'.($i+3))->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_CENTER);  
            $objPHPExcel->getActiveSheet()->getStyle('A'.($i+3).':J'.($i+3))->getAlignment()->setVertical(PHPExcel_Style_Alignment::VERTICAL_CENTER);  
            $objPHPExcel->getActiveSheet()->getStyle('A'.($i+3).':J'.($i+3))->getBorders()->getAllBorders()->setBorderStyle(PHPExcel_Style_Border::BORDER_THIN);  
            $objPHPExcel->getActiveSheet()->getRowDimension($i+3)->setRowHeight(16);  
        }  
  
  
        // Rename sheet   
        $objPHPExcel->getActiveSheet()->setTitle('bangjieup');  
  
  
        // Set active sheet index to the first sheet, so Excel opens this as the first sheet   
        $objPHPExcel->setActiveSheetIndex(0);  
  
  
        // Redirect output to a client’s web browser (Excel5)   
        header('Content-Type: application/vnd.ms-excel');  
        header('Content-Disposition: attachment;filename="bangjieup('.date('Ymd-His').').xls"');  
        header('Cache-Control: max-age=0');  
  
        $objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');  
        $objWriter->save('php://output');  

    }