struts2结合ext参数传递

								$dir = "images/thumbs/";
				$images = array();
				$d = dir($dir);
				while($name = $d->read()){
				    if(!preg_match('/\.(jpg|gif|png)$/', $name)) continue;
				    $size = filesize($dir.$name);
				    $lastmod = filemtime($dir.$name)*1000;
				    $images[] = array('name'=>$name, 'size'=>$size, 
							'lastmod'=>$lastmod, 'url'=>$dir.$name);
				}
				$d->close();
				$o = array('images'=>$images);
				echo json_encode($o);
				?>