当你想删除oss服务中某个bucket下的文件夹时，文件夹中又包含了太多文件，递归删除太过耗时，又必须删除时，此时就要用oss的文件删除策略，如下所示：

OSSClient client = new OSSClient(endpoint, accessId, accessKey);SetBucketLifecycleRequest req = new SetBucketLifecycleRequest(bucketName);// 添加Lifecycle规则req.AddLifecycleRule(new LifecycleRule("delete obsoleted files", "obsoleted/", RuleStatus.Enabled, 3)); req.AddLifecycleRule(new LifecycleRule("delete temporary files", "temporary/", RuleStatus.Enabled, DateUtil.parseIso8601Date("2022-10-12T00:00:00.000Z"))); // 设置Bucket Lifecycle client.setBucketLifecycle(req);