通过java代码展示阿里云对象存储列举桶内对象功能的实现

在Java中使用阿里巴巴云OSS (Object Storage Service) API来列举桶内的对象，你可以通过` OSSClient` 类的 `listObjects()` 或者 `listObjectsV2()` 方法来实现。这里是一个简单的示例：

import com.aliyuncs.IAcsClient;
import com.aliyuncs.OSSDomainClient;
import com.aliyuncs.exceptions.ClientException;
import com.aliyuncs.exceptions.ServerException;

public class ListObjectsExample {
    private static final String AccessKeyId = "your_access_key_id";
    private static final String AccessKeySecret = "your_access_key_secret";
    private static final String Endpoint = "your_oss_endpoint"; // 例如：http://oss-cn-hangzhou.aliyuncs.com
    private static final String BucketName = "your_bucket_name";

    public static void main(String[] args) {
        IAcsClient iAcsClient = new IAcsClient(AccessKeyId, AccessKeySecret, Endpoint);
        try {
            OSSDomainClient ossClient = iAcsClient.getOSSDomainClientBuilder().build();
            ListObjectsResponse response = ossClient.listObjects(new ListObjectsRequest()
                    .withBucketName(BucketName)
                    .withMaxKeys(10)); // 指定最多获取10个对象

            if (response.getObjectSummaries() != null && !response.getObjectSummaries().isEmpty()) {
                for (OSSObjectSummary objectSummary : response.getObjectSummaries()) {
                    System.out.printf("Object Name: %s, LastModified: %s%n", objectSummary.getKey(), objectSummary.getLastModified());
                }
            } else {
                System.out.println("No objects in the bucket.");
            }

        } catch (ClientException e) {
            e.printStackTrace();
        } catch (ServerException e) {
            e.printStackTrace();
        } finally {
            iAcsClient.shutdown();
        }
    }
}

在这个例子中，你需要替换`AccessKeyId`, `AccessKeySecret`, 和 `BucketName` 为你自己的阿里云账号信息和实际的桶名。运行这个程序会列出指定桶中的前10个对象及其最后修改时间。