public void testMutiPartUpload(){

        File file = new File(filePath);

        long contentLength = file.length();

        long partSize = 5 * 1024 * 1024; // Set part size to 5 MB.

        try {

            ListpartETags = new ArrayList();

            // Initiate the multipart upload.

            InitiateMultipartUploadRequest initRequest = new InitiateMultipartUploadRequest(bucketName, objectName);

            InitiateMultipartUploadResult initResponse = s3.initiateMultipartUpload(initRequest);

            // Upload the file parts.

            long filePosition = 0;

            for (int i = 1; filePosition < contentLength; i++) {

                // Because the last part could be less than 5 MB, adjust the part size as needed.

                partSize = Math.min(partSize, (contentLength - filePosition));

                // Create the request to upload a part.

                UploadPartRequest uploadRequest = new UploadPartRequest()

                        .withBucketName(bucketName)

                        .withKey(objectName)

                        .withUploadId(initResponse.getUploadId())

                        .withPartNumber(i)

                        .withFileOffset(filePosition)

                        .withFile(file)

                        .withPartSize(partSize);

                // Upload the part and add the response's ETag to our list.

                UploadPartResult uploadResult = s3.uploadPart(uploadRequest);

                partETags.add(uploadResult.getPartETag());

                filePosition += partSize;

            }

            // Complete the multipart upload.

            CompleteMultipartUploadRequest compRequest = new CompleteMultipartUploadRequest(bucketName, objectName,

                    initResponse.getUploadId(), partETags);

            s3.completeMultipartUpload(compRequest);

        } catch (AmazonServiceException e) {

            System.err.println(e.getErrorMessage());

        }

    }

public void testAbortMutiPartUpload() {

        try {

            // Find all in-progress multipart uploads.

            ListMultipartUploadsRequest allMultipartUploadsRequest = new ListMultipartUploadsRequest(bucketName);

            MultipartUploadListing multipartUploadListing = s3.listMultipartUploads(allMultipartUploadsRequest);

            Listuploads = multipartUploadListing.getMultipartUploads();

            System.out.println("Before deletions, " + uploads.size() + " multipart uploads in progress.");

            // Abort each upload.

            for (MultipartUpload u : uploads) {

                System.out.println("Upload in progress: Key = \"" + u.getKey() + "\", id = " + u.getUploadId());

                s3.abortMultipartUpload(new AbortMultipartUploadRequest(bucketName, u.getKey(), u.getUploadId()));

                System.out.println("Upload deleted: Key = \"" + u.getKey() + "\", id = " + u.getUploadId());

            }

            // Verify that all in-progress multipart uploads have been aborted.

            multipartUploadListing = s3.listMultipartUploads(allMultipartUploadsRequest);

            uploads = multipartUploadListing.getMultipartUploads();

            System.out.println("After aborting uploads, " + uploads.size() + " multipart uploads in progress.");

        } catch (AmazonServiceException e) {

            System.err.println(e.getErrorMessage());

        }

    }

   public void testListMutiPartUpload() {

          try {

              // Retrieve a list of all in-progress multipart uploads.

              ListMultipartUploadsRequest allMultipartUploadsRequest = new ListMultipartUploadsRequest(bucketName);

              MultipartUploadListing multipartUploadListing = s3.listMultipartUploads(allMultipartUploadsRequest);

              Listuploads = multipartUploadListing.getMultipartUploads();

              // Display information about all in-progress multipart uploads.

              System.out.println(uploads.size() + " multipart upload(s) in progress.");

              for (MultipartUpload u : uploads) {

                  System.out.println("Upload in progress: Key = \"" + u.getKey() + "\", id = " + u.getUploadId());

              }

          } catch (AmazonServiceException e) {

              System.err.println(e.getErrorMessage());

          }

      }