phpExcel将读取的单元格信息保存在内存中,我们可以通过
<BR>PHPExcel_Settings::setCacheStorageMethod()<BR>
来设置不同的缓存方式,已达到降低内存消耗的目的!
1、将单元格数据序列化后保存在内存中
<BR>PHPExcel_CachedObjectStorageFactory::cache_in_memory_serialized; <BR>
2、将单元格序列化后再进行Gzip压缩,然后保存在内存中
<BR>PHPExcel_CachedObjec<strong style="color:transparent">本&文来源gao@daima#com搞(%代@#码网@</strong><textarea>搞gaodaima代码</textarea>tStorageFactory::cache_in_memory_gzip; <BR>
3、缓存在临时的磁盘文件中,速度可能会慢一些
<BR>PHPExcel_CachedObjectStorageFactory::cache_to_discISAM;<BR>
4、保存在php://temp
<BR>PHPExcel_CachedObjectStorageFactory::cache_to_phpTemp; <BR>
5、保存在memcache中
PHPExcel_CachedObjectStorageFactory::cache_to_memcache<BR>
举例:
第4中方式:
<BR>$cacheMethod = PHPExcel_CachedObjectStorageFactory:: cache_to_phpTemp; <BR>$cacheSettings = array( ' memoryCacheSize ' => '8MB' <BR> ); <BR>PHPExcel_Settings::setCacheStorageMethod($cacheMethod, $cacheSettings); <BR>
第5种:
<BR>$cacheMethod = PHPExcel_CachedObjectStorageFactory::cache_to_memcache; <BR>$cacheSettings = array( 'memcacheServer' => 'localhost', <BR> 'memcachePort' => 11211, <BR> 'cacheTime' => 600 <BR> ); <BR>PHPExcel_Settings::setCacheStorageMethod($cacheMethod, $cacheSettings);<BR>
其它的方法
第一个方法,你可以考虑生成多个sheet的方式,不需要生成多个excel文件,根据你数据总量计算每个sheet导出多少行, 下面是PHPExcel生成多个sheet方法:
面是PHPExcel生成多个sheet方法:
<BR>$sheet = $objPHPExcel->getActiveSheet(); <BR>$sheet->setCellValue('A1',$x); <BR>$sheet->setCellValue('B1',$y);<BR>
第二个方法,你可以考虑ajax来分批导出,不用每次刷新页面。
<BR>export to Excel <BR>$('#export').click(function() { <BR> $.ajax({ <BR> url: "export.php", <BR> data: getData(), //这个地方你也可以在php里获取,一般读数据库 <BR> success: function(response){ <BR> window.location.href = response.url; <BR> } <BR> }) <BR>});<BR>
<BR><?php <BR>//export.php <BR>$data = $_POST['data'];<BR>$xls = new PHPExcel(); <BR>$xls->loadData($formattedData);<BR>$xls->exportToFile('excel.xls');<BR>$response = array( <BR>'success' => true, <BR>'url' => $url <BR>); <BR>header('Content-type: application/json'); <BR>echo json_encode($response); <BR>?><BR>
数据量很大的话,建议采用第二种方法,ajax来导出数据,上面方法简单给了个流程,具体你自己补充!