我能找到上次值更改的时间戳吗？

import com.qcloud.cos.COSClient;
import com.qcloud.cos.model.ObjectMetadata;
import com.qcloud.cos.model.GetObjectMetadataRequest;

public class GetLastModifiedTime {
    public static void main(String[] args) {
        String bucketName = "your-bucket-name";
        String key = "your-object-key";

        COSClient cosClient = new COSClient("your-appid", "your-secret-id", "your-secret-key");
        GetObjectMetadataRequest request = new GetObjectMetadataRequest(bucketName, key);
        ObjectMetadata metadata = cosClient.getObjectMetadata(request);
        String lastModified = metadata.getLastModified().toString();
        System.out.println("Last modified time: " + lastModified);

        cosClient.shutdown();
    }
}