AWS S3：获取上次修改的时间戳 Java
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AWS S3 : Get Last Modified Timestamp Java
提问by Codex
I have written a java code to get the list of files in a AWS S3 bucket's folder as a list of strings. Is there any direct function that I could use to get the last modified timestamp of a file that we see in the s3 buckets.
我编写了一个 java 代码来获取 AWS S3 存储桶文件夹中的文件列表作为字符串列表。是否有任何直接函数可以用来获取我们在 s3 存储桶中看到的文件的最后修改时间戳。
回答by H6.
You can get the lastModifiedas a java.util.Datevia the S3ObjectSummaryobject.
您可以通过S3ObjectSummary对象获取lastModifiedas a 。java.util.Date
// ...
ListObjectsV2Request listObjectsV2Request = new ListObjectsV2Request()
.withBucketName("my-bucket")
.withMaxKeys(1000);
ListObjectsV2Result result = s3client.listObjectsV2(listObjectsV2Request);
for (S3ObjectSummary objectSummary : result.getObjectSummaries()) {
// objectSummary.getLastModified() as java.util.Date
}
回答by gil.fernandes
If you want to know the last modified timestamp of a specific file without listing the whole directory you can use a GetObjectRequestand then retrieve from it the ObjectMetadata. Here is an example:
如果您想知道特定文件的最后修改时间戳而不列出整个目录，您可以使用 aGetObjectRequest然后从中检索 ObjectMetadata。下面是一个例子：
S3Object fullObject = s3Client.getObject(new GetObjectRequest(bucketName, remoteFilePath));
ObjectMetadata objectMetadata = fullObject.getObjectMetadata();
Date lastModified = objectMetadata.getLastModified();
回答by koolhead17
You can alternatively use minio-javaclient library for same. Its Open Source and compatible with AWS S3 API.
您也可以使用minio-java客户端库。其开源并与 AWS S3 API 兼容。
Using ListBucketsAPI, you can easily implement it.
使用ListBucketsAPI，您可以轻松实现它。
try {
// List buckets that have read access.
List bucketList = minioClient.listBuckets();
for (Bucket bucket : bucketList) {
System.out.println(bucket.creationDate() + ", " + bucket.name());
}
} catch (MinioException e) {
System.out.println("Error occured: " + e);
}
Hope it helps.
希望能帮助到你。
Disclaimer: I work for Minio
免责声明：我为Minio工作
