public static String getUrl(String fileId) {
		FastdfsClient fastdfsClient = null;
		String url = null;
		try {
			fastdfsClient = FastdfsClientFactory.getFastdfsClient();
			url = fastdfsClient.getUrl(fileId);	
		} catch (Exception e) {
			logger.error("获取图片发生异常", e);
		} finally {
			fastdfsClient.close();
		}
		return url;
		
	}