How to create and delete folder and files from AWS S3 bucket in Java

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.InputStream;
import java.util.List;
import com.amazonaws.auth.AWSCredentials;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.Bucket;
import com.amazonaws.services.s3.model.CannedAccessControlList;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.amazonaws.services.s3.model.PutObjectRequest;
import com.amazonaws.services.s3.model.S3ObjectSummary;
public class AmazonS3Example {

private static final String SUFFIX = "/";

public static void main(String[] args) {
// credentials object identifying user for authentication
// user must have AWSConnector and AmazonS3FullAccess for
// this example to work
AWSCredentials credentials = new BasicAWSCredentials("AKIAJKQUCPNKR7SMLKHA", "fqt2QoaJSy4xE95lk+d29MoilYDk1MZj+Wjny7Qk");

// create a client connection based on credentials
AmazonS3 s3client = new AmazonS3Client(credentials);

// create bucket - name must be unique for all S3 users
String bucketName = "uploads.cdn.placester.net";
s3client.createBucket(bucketName);

// list buckets
for (Bucket bucket : s3client.listBuckets()) {
System.out.println(" - " + bucket.getName());
}

// create folder into bucket
String folderName = "testfolder";
createFolder(bucketName, folderName, s3client);

// upload file to folder and set it to public
String fileName = folderName + SUFFIX + "build.xml";
s3client.putObject(new PutObjectRequest(bucketName, fileName,
new File("E:\\jets jar\\jets3t-0.9.4\\build.xml"))
.withCannedAcl(CannedAccessControlList.PublicRead));

deleteFolder(bucketName, folderName, s3client);

// deletes bucket
s3client.deleteBucket(bucketName);
}

public static void createFolder(String bucketName, String folderName, AmazonS3 client) {
// create meta-data for your folder and set content-length to 0
ObjectMetadata metadata = new ObjectMetadata();
metadata.setContentLength(0);
// create empty content
InputStream emptyContent = new ByteArrayInputStream(new byte[0]);
// create a PutObjectRequest passing the folder name suffixed by /
PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName,
folderName + SUFFIX, emptyContent, metadata);
// send request to S3 to create folder
client.putObject(putObjectRequest);
}
/**
* This method first deletes all the files in given folder and than the
* folder itself
*/
public static void deleteFolder(String bucketName, String folderName, AmazonS3 client) {
List fileList =
client.listObjects(bucketName, folderName).getObjectSummaries();
for (S3ObjectSummary file : fileList) {
client.deleteObject(bucketName, file.getKey());
}
client.deleteObject(bucketName, folderName);
}
}