删除文件夹及其内容 AWS S3 java
Delete a folder and its content AWS S3 java
是否可以使用 java sdk for aws 通过单个 api 请求删除文件夹(在 S3 存储桶中)及其所有内容。对于浏览器控制台,我们只需单击一下即可删除文件夹及其内容,我希望使用 API 也能实现相同的行为。
S3中没有文件夹之类的东西;只有文件名中带有斜杠的文件。
浏览器控制台会将这些斜杠可视化为文件夹,但它们不是真实的。
您可以删除所有具有相同前缀的文件,但您需要先使用list_objects()查找它们,然后您才能批量删除它们。
使用 Java sdk 的代码片段请参考下面的文档
http://docs.aws.amazon.com/AmazonS3/latest/dev/DeletingMultipleObjectsUsingJava.html
您可以在 ListObjectsRequest 中指定 keyPrefix。
例如,考虑包含以下键的存储桶:
- foo/bar/baz
- foo/bar/bash
- foo/bar/bang
- foo/boo
并且您想从 foo/bar/baz.
中删除文件
if (s3Client.doesBucketExist(bucketName)) {
ListObjectsRequest listObjectsRequest = new ListObjectsRequest()
.withBucketName(bucketName)
.withPrefix("foo/bar/baz");
ObjectListing objectListing = s3Client.listObjects(listObjectsRequest);
while (true) {
for (S3ObjectSummary objectSummary : objectListing.getObjectSummaries()) {
s3Client.deleteObject(bucketName, objectSummary.getKey());
}
if (objectListing.isTruncated()) {
objectListing = s3Client.listNextBatchOfObjects(objectListing);
} else {
break;
}
}
}
在 java sdk 中没有提供文件夹名称或更具体的前缀来删除文件的选项。但是可以选择提供要删除的键数组。
Click for details
.
利用这个,我写了一个小方法,可以删除某个前缀对应的所有文件。
private AmazonS3 s3client = <Your s3 client>;
private String bucketName = <your bucket name, can be signed or unsigned>;
public void deleteDirectory(String prefix) {
ObjectListing objectList = this.s3client.listObjects( this.bucketName, prefix );
List<S3ObjectSummary> objectSummeryList = objectList.getObjectSummaries();
String[] keysList = new String[ objectSummeryList.size() ];
int count = 0;
for( S3ObjectSummary summery : objectSummeryList ) {
keysList[count++] = summery.getKey();
}
DeleteObjectsRequest deleteObjectsRequest = new DeleteObjectsRequest( bucketName ).withKeys( keysList );
this.s3client.deleteObjects(deleteObjectsRequest);
}
你可以试试这个
void deleteS3Folder(String bucketName, String folderPath) {
for (S3ObjectSummary file : s3.listObjects(bucketName, folderPath).getObjectSummaries()){
s3.deleteObject(bucketName, file.getKey());
}
}
您可以试试下面的方法,即使是截断的页面,它也会处理删除,并且会递归删除给定目录中的所有内容:
public Set<String> listS3DirFiles(String bucket, String dirPrefix) {
ListObjectsV2Request s3FileReq = new ListObjectsV2Request()
.withBucketName(bucket)
.withPrefix(dirPrefix)
.withDelimiter("/");
Set<String> filesList = new HashSet<>();
ListObjectsV2Result objectsListing;
try {
do {
objectsListing = amazonS3.listObjectsV2(s3FileReq);
objectsListing.getCommonPrefixes().forEach(folderPrefix -> {
filesList.add(folderPrefix);
Set<String> tempPrefix = listS3DirFiles(bucket, folderPrefix);
filesList.addAll(tempPrefix);
});
for (S3ObjectSummary summary: objectsListing.getObjectSummaries()) {
filesList.add(summary.getKey());
}
s3FileReq.setContinuationToken(objectsListing.getNextContinuationToken());
} while(objectsListing.isTruncated());
} catch (SdkClientException e) {
System.out.println(e.getMessage());
throw e;
}
return filesList;
}
public boolean deleteDirectoryContents(String bucket, String directoryPrefix) {
Set<String> keysSet = listS3DirFiles(bucket, directoryPrefix);
if (keysSet.isEmpty()) {
System.out.println("Given directory {} doesn't have any file "+ directoryPrefix);
return false;
}
DeleteObjectsRequest deleteObjectsRequest = new DeleteObjectsRequest(bucket)
.withKeys(keysSet.toArray(new String[0]));
try {
amazonS3.deleteObjects(deleteObjectsRequest);
} catch (SdkClientException e) {
System.out.println(e.getMessage());
throw e;
}
return true;
}
是否可以使用 java sdk for aws 通过单个 api 请求删除文件夹(在 S3 存储桶中)及其所有内容。对于浏览器控制台,我们只需单击一下即可删除文件夹及其内容,我希望使用 API 也能实现相同的行为。
S3中没有文件夹之类的东西;只有文件名中带有斜杠的文件。
浏览器控制台会将这些斜杠可视化为文件夹,但它们不是真实的。
您可以删除所有具有相同前缀的文件,但您需要先使用list_objects()查找它们,然后您才能批量删除它们。
使用 Java sdk 的代码片段请参考下面的文档
http://docs.aws.amazon.com/AmazonS3/latest/dev/DeletingMultipleObjectsUsingJava.html
您可以在 ListObjectsRequest 中指定 keyPrefix。
例如,考虑包含以下键的存储桶:
- foo/bar/baz
- foo/bar/bash
- foo/bar/bang
- foo/boo
并且您想从 foo/bar/baz.
中删除文件if (s3Client.doesBucketExist(bucketName)) {
ListObjectsRequest listObjectsRequest = new ListObjectsRequest()
.withBucketName(bucketName)
.withPrefix("foo/bar/baz");
ObjectListing objectListing = s3Client.listObjects(listObjectsRequest);
while (true) {
for (S3ObjectSummary objectSummary : objectListing.getObjectSummaries()) {
s3Client.deleteObject(bucketName, objectSummary.getKey());
}
if (objectListing.isTruncated()) {
objectListing = s3Client.listNextBatchOfObjects(objectListing);
} else {
break;
}
}
}
在 java sdk 中没有提供文件夹名称或更具体的前缀来删除文件的选项。但是可以选择提供要删除的键数组。 Click for details . 利用这个,我写了一个小方法,可以删除某个前缀对应的所有文件。
private AmazonS3 s3client = <Your s3 client>;
private String bucketName = <your bucket name, can be signed or unsigned>;
public void deleteDirectory(String prefix) {
ObjectListing objectList = this.s3client.listObjects( this.bucketName, prefix );
List<S3ObjectSummary> objectSummeryList = objectList.getObjectSummaries();
String[] keysList = new String[ objectSummeryList.size() ];
int count = 0;
for( S3ObjectSummary summery : objectSummeryList ) {
keysList[count++] = summery.getKey();
}
DeleteObjectsRequest deleteObjectsRequest = new DeleteObjectsRequest( bucketName ).withKeys( keysList );
this.s3client.deleteObjects(deleteObjectsRequest);
}
你可以试试这个
void deleteS3Folder(String bucketName, String folderPath) {
for (S3ObjectSummary file : s3.listObjects(bucketName, folderPath).getObjectSummaries()){
s3.deleteObject(bucketName, file.getKey());
}
}
您可以试试下面的方法,即使是截断的页面,它也会处理删除,并且会递归删除给定目录中的所有内容:
public Set<String> listS3DirFiles(String bucket, String dirPrefix) {
ListObjectsV2Request s3FileReq = new ListObjectsV2Request()
.withBucketName(bucket)
.withPrefix(dirPrefix)
.withDelimiter("/");
Set<String> filesList = new HashSet<>();
ListObjectsV2Result objectsListing;
try {
do {
objectsListing = amazonS3.listObjectsV2(s3FileReq);
objectsListing.getCommonPrefixes().forEach(folderPrefix -> {
filesList.add(folderPrefix);
Set<String> tempPrefix = listS3DirFiles(bucket, folderPrefix);
filesList.addAll(tempPrefix);
});
for (S3ObjectSummary summary: objectsListing.getObjectSummaries()) {
filesList.add(summary.getKey());
}
s3FileReq.setContinuationToken(objectsListing.getNextContinuationToken());
} while(objectsListing.isTruncated());
} catch (SdkClientException e) {
System.out.println(e.getMessage());
throw e;
}
return filesList;
}
public boolean deleteDirectoryContents(String bucket, String directoryPrefix) {
Set<String> keysSet = listS3DirFiles(bucket, directoryPrefix);
if (keysSet.isEmpty()) {
System.out.println("Given directory {} doesn't have any file "+ directoryPrefix);
return false;
}
DeleteObjectsRequest deleteObjectsRequest = new DeleteObjectsRequest(bucket)
.withKeys(keysSet.toArray(new String[0]));
try {
amazonS3.deleteObjects(deleteObjectsRequest);
} catch (SdkClientException e) {
System.out.println(e.getMessage());
throw e;
}
return true;
}