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# 在 Snowball Edge 上的 Snowball Edge 上列出与亚马逊 S3 兼容存储空间中的存储段中的对象
<a name="objects-list-s3-snow"></a>

以下示例使用列出了 Snowball Edge 存储段上与 Amazon S3 兼容存储空间中的对象。 Amazon CLI SDK 命令为 `s3-snow:ListObjectsV2`。要使用此命令，请将每个用户输入占位符替换为您自己的信息。

```
aws s3api list-objects-v2 --bucket sample-bucket --endpoint-url s3api-endpoint-ip --profile your-profile
```

有关此命令的更多信息，请参阅《*Amazon CLI 命令参考*》中的 [list-objects-v2](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/s3api/list-objects-v2.html)。

以下 Snowball Edge 上与 Amazon S3 兼容的存储示例列出了使用适用于 Java 的 SDK 的存储桶中的对象。要使用此命令，请将每个用户输入占位符替换为您自己的信息。

此示例使用 [ListObjectsV2](https://docs.amazonaws.cn/AmazonS3/latest/API/API_ListObjectsV2.html)，这是 ListObjects API 操作的最新修订版。我们建议您使用此修订后的 API 操作进行应用程序开发。为了实现向后兼容，Amazon S3 继续支持此 API 操作的先前版本。

```
import com.amazonaws.AmazonServiceException;
import com.amazonaws.SdkClientException;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.ListObjectsV2Request;
import com.amazonaws.services.s3.model.ListObjectsV2Result;
import com.amazonaws.services.s3.model.S3ObjectSummary;

public class ListObjectsV2 {

    public static void main(String[] args) {
        String bucketName = "*** Bucket name ***";

        try {
            // This code expects that you have AWS credentials set up per:
            // https://docs.aws.amazon.com/sdk-for-java/v1/developer-guide/setup-credentials.html
            AmazonS3 s3Client = AmazonS3ClientBuilder.standard()
                    .enableUseArnRegion()
                    .build();

            System.out.println("Listing objects");

            // maxKeys is set to 2 to demonstrate the use of
            // ListObjectsV2Result.getNextContinuationToken()
            ListObjectsV2Request req = new ListObjectsV2Request().withBucketName(bucketName).withMaxKeys(2);
            ListObjectsV2Result result;

            do {
                result = s3Client.listObjectsV2(req);

                for (S3ObjectSummary objectSummary : result.getObjectSummaries()) {
                    System.out.printf(" - %s (size: %d)\n", objectSummary.getKey(), objectSummary.getSize());
                }
                // If there are more than maxKeys keys in the bucket, get a continuation token
                // and list the next objects.
                String token = result.getNextContinuationToken();
                System.out.println("Next Continuation Token: " + token);
                req.setContinuationToken(token);
            } while (result.isTruncated());
        } catch (AmazonServiceException e) {
            // The call was transmitted successfully, but Amazon S3 couldn't process
            // it, so it returned an error response.
            e.printStackTrace();
        } catch (SdkClientException e) {
            // Amazon S3 couldn't be contacted for a response, or the client
            // couldn't parse the response from Amazon S3.
            e.printStackTrace();
        }
    }
}
```