AmazonS3Example.java

public class AmazonS3Example {
	private static final String ACCESS_KEY="<your access key here>";
	private static final String SECRET_KEY="<your secret key here>";
	private static final String SUFFIX = "/";
	
	private AmazonS3 initS3Client() {
		AWSCredentials credentials = new BasicAWSCredentials(
				ACCESS_KEY, 
				SECRET_KEY);
		return new AmazonS3Client(credentials);
	}
	
	private void listAllBucket() {
		System.out.println("********LISTING ALL BUCKETS - START*************");
		AmazonS3 s3client = initS3Client();
		 for (Bucket bucket : s3client.listBuckets()) {
	            System.out.println(" * " + bucket.getName());
	        }
		 System.out.println("********LISTING ALL BUCKETS - END *************");
	}

	

	private void createFolder() {
		System.out.println("********CREATING A FOLDER ON THE BUCKET anishantony - START*************");
		AmazonS3 s3client = initS3Client();
		String folderName = "test";
		String bucketName = "anishantony";
		
		
		ObjectMetadata metadata = new ObjectMetadata();
	    metadata.setContentLength(0);
	    InputStream emptyContent = new ByteArrayInputStream(new byte[0]);
	    PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName,
	                folderName + SUFFIX, emptyContent, metadata);
	    s3client.putObject(putObjectRequest);
	    System.out.println("SUCCESS!!!! FOLDER ADDED.");
		System.out.println("********CREATING A FOLDER ON THE BUCKET anishantony - END*************");
		
	}
	
	private void addToBucket() {
		System.out.println("********ADDING A FILE ON THE BUCKET anishantony - START*************");
		AmazonS3 s3client = initS3Client();
		String localFile = "C:\\img.jpg";
		String folderName = "test";
		String bucketName = "anishantony";
		
		
		String fileName = "img.jpg";
        s3client.putObject(new PutObjectRequest(bucketName, fileName, 
                new File(localFile)));
		System.out.println("********ADDING A FILE ON THE BUCKET anishantony - END*************");
		
	}

	private void retrieveEntry() throws IOException {
		System.out.println("********RETRIEVING A FILE FROM THE BUCKET anishantony - START*************");
		String bucketName = "anishantony";
		String fileName = "test.txt";
		AmazonS3 s3client = initS3Client();
		
		S3Object object = s3client.getObject(new GetObjectRequest(bucketName, fileName));
		InputStream objectData = object.getObjectContent();
		// Process the objectData stream.
		BufferedReader reader = new BufferedReader(new InputStreamReader(objectData));
		String s = null;
		while ((s = reader.readLine()) != null)
		    {
		        System.out.println(s);
		    }
		objectData.close();
		System.out.println("********RETRIEVING A FILE FROM THE BUCKET anishantony - END*************");
	}

	
	
	public static void main(String[] args) throws IOException {
		AmazonS3Example example =  new AmazonS3Example();
		example.listAllBucket();
		example.createFolder();
		example.addToBucket();
		example.retrieveEntry();
		
	}

	


}