S3Object 获取更新时间

S3Object 可以通过调用 getMetadata() 方法来获取更新时间。其中 getMetadata() 方法会返回一个 Metadata 对象，包含了包括更新时间在内的对象元数据信息。您可以使用 Metadata 对象的 getUserMetadata() 方法来获取您在上传对象时指定的元数据信息。

相关问题

S3Object是什么东西

回答: S3Object是指存储在Amazon S3中的对象。Amazon S3是一种云存储服务，用于存储和检索大量数据。S3Object可以是任何类型的文件，例如文本文件、图像文件、视频文件等。您可以使用AWS命令行界面或API来管理S3Object，例如复制、移动、删除等操作。\[1\]在VPC中访问S3时，可以使用S3端点来实现无需Internet网关的访问。\[2\]此外，您还可以设置自定义域名来将S3Object作为网站进行访问。\[3\]
#### 引用[.reference_title]
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- *3* [amazon s3_在Amazon S3上托管网站](https://blog.csdn.net/culuo8053/article/details/107931826)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
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Amazon S3 Java获取上传 ID

在使用Amazon S3 Java SDK上传文件时，可以通过在`PutObjectResult`对象中获取上传ID。示例如下：

import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3ClientBuilder;
import com.amazonaws.services.s3.model.PutObjectRequest;
import com.amazonaws.services.s3.model.PutObjectResult;

public class S3UploadExample {
    private static final String BUCKET_NAME = "your-bucket-name";
    private static final String OBJECT_KEY = "your-object-key";
    private static final String FILE_PATH = "path-to-your-file";

    public static void main(String[] args) {
        AmazonS3 s3Client = AmazonS3ClientBuilder.defaultClient();

        PutObjectRequest request = new PutObjectRequest(BUCKET_NAME, OBJECT_KEY, new File(FILE_PATH));
        PutObjectResult result = s3Client.putObject(request);

        String uploadId = result.getUploadId();
        System.out.println("Upload ID: " + uploadId);
    }
}

在上面的示例中，`result.getUploadId()`方法将返回上传ID。请注意，上传ID仅在使用分段上传时才会返回。如果您使用的是简单上传，则不会有上传ID返回。