我想知道如何做到这一点。我查看了 sdk 文档并提供了一些示例，但对语法的一般情况感到困惑。
如果我想删除一个文件，我假设我使用
deleteObject(path, key)还有你如何删除一个目录？我似乎找不到这样做的方法。
这段代码对我有用。 folderPath 类似于“topDir/secondDir/”
void deleteObjectsInFolder(String bucketName, String folderPath) {
for (S3ObjectSummary file : s3.listObjects(bucketName, folderPath).getObjectSummaries()){
s3.deleteObject(bucketName, file.getKey());
}
}
S3中的“key”类似于文件路径：
http://bucket.s3.amazonaws.com/some/path/to/use
... 在一个名为
bucketsome/path/to/use它实际上不是路径，因为没有文件夹。 S3 密钥只是一个大目录（整个存储桶）中文件的文件名。 S3键可以包含
/delimiter换句话说，拥有一个名为
some/objectsome但是，您可以请求具有特定前缀的键，所以我可以说“给我所有以
some/path/to/some/path/to/use我可以很容易地这样命名：
somepathtousea
somepathtouseb
然后说“给我所有以
somepathtousesomepathtouseasomepathtouseb注意：S3 URL 有多种形式：
http://s3.amazonaws.com/bucket/key
http://bucket.s3.amazonaws.com/key
http://bucket/key (where bucket is a DNS CNAME record pointing to bucket.s3.amazonaws.com)
我看了
JavaDocs，这是我看到的函数签名（对于AmazonS3Client
）：
public void deleteObject(java.lang.String bucketName,
java.lang.String key)
throws AmazonClientException,
AmazonServiceException
再次编辑：
文件夹现在确实存在，作为内容类型为
application/x-directory
且键以
/结尾的零长度对象：
$ AWS_PROFILE=prod aws s3api head-object --bucket example-bucket --key example-directory/
{
"AcceptRanges": "bytes",
"LastModified": "Mon, 29 Apr 2019 14:59:36 GMT",
"ContentLength": 0,
"ETag": "\"d41d8cd98f00b204e9800998ecf8427e\"",
"ContentType": "application/x-directory",
"ServerSideEncryption": "AES256",
"Metadata": {}
}
这仍然只是约定俗成，没有什么可以阻止您拥有以
/
结尾的文件或不存在的“文件夹”中的文件。
example，以快速参考如何从 S3 中删除对象。
delete
的语法实际上是
deleteObject( bucketName, key )其中 bucketName 是您放置文件的存储桶，key 是您要在存储桶中删除的文件的名称。将桶视为您的硬盘驱动器，如 C:\、D:\ 等。并将键视为您要删除的文件的绝对路径名。
s3://my_bucket/Path/to/my/folder
然后，下面的代码应该可以工作。 */
String Bucket_Name = "my_bucket";
String key = "Path/to/my/folder";
ObjectListing objects = s3Client.listObjects(BUCKET_NAME, key);
for (S3ObjectSummary objectSummary : objects.getObjectSummaries())
{
s3Client.deleteObject(BUCKET_NAME, objectSummary.getKey());
}
AWS 参考）：
public void deleteBucket(final String bucketName) {
final AmazonS3 s3 = AmazonS3ClientBuilder.defaultClient();
try {
ObjectListing objectListing = s3.listObjects(bucketName);
while (true) {
for (Iterator<?> iterator = objectListing.getObjectSummaries().iterator(); iterator.hasNext(); ) {
S3ObjectSummary summary = (S3ObjectSummary) iterator.next();
s3.deleteObject(bucketName, summary.getKey());
}
if (objectListing.isTruncated()) {
objectListing = s3.listNextBatchOfObjects(objectListing);
} else {
break;
}
}
VersionListing versionListing = s3.listVersions(new ListVersionsRequest().withBucketName(bucketName));
while (true) {
for (Iterator<?> iterator = versionListing.getVersionSummaries().iterator(); iterator.hasNext(); ) {
S3VersionSummary vs = (S3VersionSummary) iterator.next();
s3.deleteVersion(bucketName, vs.getKey(), vs.getVersionId());
}
if (versionListing.isTruncated()) {
versionListing = s3.listNextBatchOfVersions(versionListing);
} else {
break;
}
}
s3.deleteBucket(bucketName);
} catch (AmazonServiceException e) {
System.err.println(e.getErrorMessage());
}
}
long start = System.currentTimeMillis();
long totalSize = 0;
int totalItems = 0;
String key ="path/to/folder/"
String bucket = "my-bucket"
final ListObjectsRequest listObjectsRequest = new ListObjectsRequest().withBucketName(bucketName).withPrefix(key);
ObjectListing objects = s3.listObjects(listObjectsRequest);
do {
for (S3ObjectSummary objectSummary : objects.getObjectSummaries()) {
totalSize += objectSummary.getSize();
totalItems++;
s3.deleteObject(bucketName, objectSummary.getKey());
}
objects = s3.listNextBatchOfObjects(objects);
} while (objects.isTruncated());
long stop = System.currentTimeMillis();
LOG.trace("User {} had {} items with {} Kb, took {} ms to delete", user.getName(), totalItems, totalSize / 1024, stop
- start);
private void deleteObjectsInFolder() {
try {
ListObjectsV2Result result;
do {
String folderPath = " ";
result = s3.listObjectsV2(Constants.BUCKET_NAME, folderPath);
Log.e("count:", result.getKeyCount() + "");
if (result.getKeyCount() != 0) {
for (S3ObjectSummary objectSummary :
result.getObjectSummaries()) {
s3.deleteObject(Constants.BUCKET_NAME, objectSummary.getKey());
}
}
System.out.println("Next Continuation Token : " + result.getNextContinuationToken());
} while (result.isTruncated() == true);
} catch (AmazonServiceException ase) {
System.out.println("Caught an AmazonServiceException, " +
"which means your request made it " +
"to Amazon S3, but was rejected with an error response " +
"for some reason.");
System.out.println("Error Message: " + ase.getMessage());
System.out.println("HTTP Status Code: " + ase.getStatusCode());
System.out.println("AWS Error Code: " + ase.getErrorCode());
System.out.println("Error Type: " + ase.getErrorType());
System.out.println("Request ID: " + ase.getRequestId());
} catch (AmazonClientException ace) {
System.out.println("Caught an AmazonClientException, " +
"which means the client encountered " +
"an internal error while trying to communicate" +
" with S3, " +
"such as not being able to access the network.");
System.out.println("Error Message: " + ace.getMessage());
}
}
public void deleteObjects(String bucketName, List<String> keys) {
List<KeyVersion> bulk = new ArrayList<>();
for (int i = 0; i < keys.size(); i++) {
bulk.add(new KeyVersion(keys.get(i)));
if (i % 100 == 0) {
try {
s3Client.deleteObjects(new DeleteObjectsRequest(bucketName).withKeys(bulk));
} catch (Exception e) {
System.err.println(e.getErrorMessage());
}
bulk.clear();
}
}
if (bulk.size() > 0) {
try {
s3Client.deleteObjects(new DeleteObjectsRequest(bucketName).withKeys(bulk));
} catch (Exception e) {
System.err.println(e.getErrorMessage());
}
}
}
来源：
http://codeflex.co/delete-objects-from-amazon-s3-bucket-using-aws-sdk-for-java/
keyName
是文件名：
s3Client.deleteObject(new DeleteObjectRequest(bucketName, keyName));
class S3(
var bucketName: String? = null,
var key: String? = null,
val accessKey: String? = null,
val secretKey: String? = null,
val region: String? = null
)
fun delete(
s3: S3,
keyword: String = "",
) {
with(s3) {
val client = client(accessKey, secretKey, region)
var objects = client.listObjects(bucketName, key)
while (true) {
for (i in objects.objectSummaries) {
if (!i.key.contains(keyword)) {
continue
}
client.deleteObject(bucketName, i.key)
}
if (objects.isTruncated) {
objects = client.listNextBatchOfObjects(objects)
} else {
break
}
}
var versions = client.listVersions(bucketName, key)
while (true) {
for (i in versions.versionSummaries) {
if (!i.key.contains(keyword)) {
continue
}
client.deleteVersion(bucketName, i.key, i.versionId)
}
if (versions.isTruncated) {
versions = client.listNextBatchOfVersions(versions)
} else {
break
}
}
}
}
这需要时间，但最终会删除所有文件和文件夹。
public static void deleteObjects(AmazonS3 s3Client, String bucketName, String folderPath)
{
while(getFilesListInBucket(s3Client, bucketName, folderPath).size()>0) {
for (S3ObjectSummary file : s3Client.listObjects(bucketName, folderPath).getObjectSummaries()) {
s3Client.deleteObject(bucketName, file.getKey());
}
}
}