import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
 
import com.amazonaws.auth.profile.ProfileCredentialsProvider;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.AbortMultipartUploadRequest;
import com.amazonaws.services.s3.model.CompleteMultipartUploadRequest;
import com.amazonaws.services.s3.model.InitiateMultipartUploadRequest;
import com.amazonaws.services.s3.model.InitiateMultipartUploadResult;
import com.amazonaws.services.s3.model.PartETag;
import com.amazonaws.services.s3.model.UploadPartRequest;
 
public class UploadObjectMPULowLevelAPI {
 
    public static void main(String[] args) throws IOException {
        String existingBucketName  = "*** Provide-Your-Existing-BucketName ***"; 
        String keyName             = "*** Provide-Key-Name ***";
        String filePath            = "*** Provide-File-Path ***";   
 
        AmazonS3 s3Client = new AmazonS3Client(new ProfileCredentialsProvider());        
 
        // Create a list of UploadPartResponse objects. You get one of these
        // for each part upload.
        List<PartETag> partETags = new ArrayList<PartETag>();
 
        // Step 1: Initialize.
        InitiateMultipartUploadRequest initRequest = new 
             InitiateMultipartUploadRequest(existingBucketName, keyName);
        InitiateMultipartUploadResult initResponse = 
        	                   s3Client.initiateMultipartUpload(initRequest);
 
        File file = new File(filePath);
        long contentLength = file.length();
        long partSize = 5242880; // Set part size to 5 MB.
 
        try {
            // Step 2: Upload parts.
            long filePosition = 0;
            for (int i = 1; filePosition < contentLength; i++) {
                // Last part can be less than 5 MB. Adjust part size.
            	partSize = Math.min(partSize, (contentLength - filePosition));
 
                // Create request to upload a part.
                UploadPartRequest uploadRequest = new UploadPartRequest()
                    .withBucketName(existingBucketName).withKey(keyName)
                    .withUploadId(initResponse.getUploadId()).withPartNumber(i)
                    .withFileOffset(filePosition)
                    .withFile(file)
                    .withPartSize(partSize);
 
                // Upload part and add response to our list.
                partETags.add(
                		s3Client.uploadPart(uploadRequest).getPartETag());
 
                filePosition += partSize;
            }
 
            // Step 3: Complete.
            CompleteMultipartUploadRequest compRequest = new 
                         CompleteMultipartUploadRequest(
                                    existingBucketName, 
                                    keyName, 
                                    initResponse.getUploadId(), 
                                    partETags);
 
            s3Client.completeMultipartUpload(compRequest);
        } catch (Exception e) {
            s3Client.abortMultipartUpload(new AbortMultipartUploadRequest(
                    existingBucketName, keyName, initResponse.getUploadId()));
        }
    }
}

import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.List; import com.amazonaws.auth.profile.ProfileCredentialsProvider; import com.amazonaws.services.s3.AmazonS3; import com.amazonaws.services.s3.AmazonS3Client; import com.amazonaws.services.s3.model.AbortMultipartUploadRequest; import com.amazonaws.services.s3.model.CompleteMultipartUploadRequest; import com.amazonaws.services.s3.model.InitiateMultipartUploadRequest; import com.amazonaws.services.s3.model.InitiateMultipartUploadResult; import com.amazonaws.services.s3.model.PartETag; import com.amazonaws.services.s3.model.UploadPartRequest; public class UploadObjectMPULowLevelAPI { public static void main(String[] args) throws IOException { String existingBucketName = "*** Provide-Your-Existing-BucketName ***"; String keyName = "*** Provide-Key-Name ***"; String filePath = "*** Provide-File-Path ***"; AmazonS3 s3Client = new AmazonS3Client(new ProfileCredentialsProvider()); // Create a list of UploadPartResponse objects. You get one of these // for each part upload. List<PartETag> partETags = new ArrayList<PartETag>(); // Step 1: Initialize. InitiateMultipartUploadRequest initRequest = new InitiateMultipartUploadRequest(existingBucketName, keyName); InitiateMultipartUploadResult initResponse = s3Client.initiateMultipartUpload(initRequest); File file = new File(filePath); long contentLength = file.length(); long partSize = 5242880; // Set part size to 5 MB. try { // Step 2: Upload parts. long filePosition = 0; for (int i = 1; filePosition < contentLength; i++) { // Last part can be less than 5 MB. Adjust part size. partSize = Math.min(partSize, (contentLength - filePosition)); // Create request to upload a part. UploadPartRequest uploadRequest = new UploadPartRequest() .withBucketName(existingBucketName).withKey(keyName) .withUploadId(initResponse.getUploadId()).withPartNumber(i) .withFileOffset(filePosition) .withFile(file) .withPartSize(partSize); // Upload part and add response to our list. partETags.add( s3Client.uploadPart(uploadRequest).getPartETag()); filePosition += partSize; } // Step 3: Complete. CompleteMultipartUploadRequest compRequest = new CompleteMultipartUploadRequest( existingBucketName, keyName, initResponse.getUploadId(), partETags); s3Client.completeMultipartUpload(compRequest); } catch (Exception e) { s3Client.abortMultipartUpload(new AbortMultipartUploadRequest( existingBucketName, keyName, initResponse.getUploadId())); } } }