Upload an Object Using the AWS SDK for Java

Example
The following example creates two objects. The first object has a text string as data, and the second object is a file. The example creates the first object by specifying the bucket name, object key, and text data directly in a call to AmazonS3Client.putObject(). The example creates the second object by using a PutObjectRequest that specifies the bucket name, object key, and file path. The PutObjectRequest also specifies the ContentType header and title metadata.
For instructions on creating and testing a working sample, see Testing the Amazon S3 Java Code Examples.

import com.amazonaws.AmazonServiceException;

import com.amazonaws.SdkClientException;

import com.amazonaws.regions.Regions;

import com.amazonaws.services.s3.AmazonS3;

import com.amazonaws.services.s3.AmazonS3ClientBuilder;

import com.amazonaws.services.s3.model.ObjectMetadata;

import com.amazonaws.services.s3.model.PutObjectRequest;

import java.io.File;

import java.io.IOException;

public class UploadObject {

public static void main(String[] args) throws IOException {

Regions clientRegion = Regions.DEFAULT_REGION;

String bucketName = "*** Bucket name ***";

String stringObjKeyName = "*** String object key name ***";

String fileObjKeyName = "*** File object key name ***";

String fileName = "*** Path to file to upload ***";

try {

//This code expects that you have AWS credentials set up per:

// https://docs.aws.amazon.com/sdk-for-java/v1/developer-guide/setup-credentials.html

AmazonS3 s3Client = AmazonS3ClientBuilder.standard()

.withRegion(clientRegion)

.build();

// Upload a text string as a new object.

s3Client.putObject(bucketName, stringObjKeyName, "Uploaded String Object");

// Upload a file as a new object with ContentType and title specified.

PutObjectRequest request = new PutObjectRequest(bucketName, fileObjKeyName, new File(fileName));

ObjectMetadata metadata = new ObjectMetadata();

metadata.setContentType("text/plain");

metadata.addUserMetadata("x-amz-meta-title", "someTitle");

request.setMetadata(metadata);

s3Client.putObject(request);

} catch (AmazonServiceException e) {

// The call was transmitted successfully, but Amazon S3 couldn't process

// it, so it returned an error response.

e.printStackTrace();

} catch (SdkClientException e) {

// Amazon S3 couldn't be contacted for a response, or the client

// couldn't parse the response from Amazon S3.

e.printStackTrace();

}

}

}