How to empty Amazon S3 Bucket using AWS Java SDK? - amazon-web-services

Question

I was unable to find any documentation on how to empty an Amazon S3 bucket programmatically in Java. Any help will be appreciated.

Answer 1

To delete Amazon S3 objects using Java, you can use the AWS SDK for Java V2. To empty a bucket, first get a list of all objects in the Bucket using this code:
public static void listBucketObjects(S3Client s3, String bucketName ) {
try {
ListObjectsRequest listObjects = ListObjectsRequest
.builder()
.bucket(bucketName)
.build();
ListObjectsResponse res = s3.listObjects(listObjects);
List<S3Object> objects = res.contents();
for (ListIterator iterVals = objects.listIterator(); iterVals.hasNext(); ) {
S3Object myValue = (S3Object) iterVals.next();
System.out.print("\n The name of the key is " + myValue.key());
System.out.print("\n The object is " + calKb(myValue.size()) + " KBs");
System.out.print("\n The owner is " + myValue.owner());
}
} catch (S3Exception e) {
System.err.println(e.awsErrorDetails().errorMessage());
System.exit(1);
}
}
For each object, you can delete it using this code:
public static void deleteBucketObjects(S3Client s3, String bucketName, String objectName) {
ArrayList<ObjectIdentifier> toDelete = new ArrayList<ObjectIdentifier>();
toDelete.add(ObjectIdentifier.builder().key(objectName).build());
try {
DeleteObjectsRequest dor = DeleteObjectsRequest.builder()
.bucket(bucketName)
.delete(Delete.builder().objects(toDelete).build())
.build();
s3.deleteObjects(dor);
} catch (S3Exception e) {
System.err.println(e.awsErrorDetails().errorMessage());
System.exit(1);
}
System.out.println("Done!");
}
You can find these examples and many others in AWS Github here:
Amazon S3 Java code examples