Connect Amazon S3 from Java code. Amazon S3 with Java. Amazon S3 Java code example using the AWS SDK. Upload single or multiple object using AWS Java SDK

Login to aws.amazon.com
Create one user from IAM and give access these things:
AWSConnector
AmazonS3FullAccess

And copy "Access Key" and "Secret Access Key" and it will using in your java code to establish connection.

Create one Maven Project in any Eclipse and add this below one dependency:


    com.amazonaws
    aws-java-sdk
    1.9.2

Then use below code to create bucket, create folder and upload some text file.

package AmazonS3.amazondemo;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.InputStream;

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

public class App
{

static String accessKey = "**********************************";
static String secretAccessKey = "********************************************";


    public static void main( String[] args )
    {
        System.out.println( "Demo for Amazon S3 connectivity from Standalone Java code!" );
        AWSCredentials awsCredentials = new BasicAWSCredentials(accessKey, secretAccessKey);
       
        AmazonS3 amazonS3Client = new AmazonS3Client(awsCredentials);
       
        System.out.println("Bucket is being created ..................");
        String bucketName = "bucktbyjavacode";
        amazonS3Client.createBucket(bucketName);
       
        for(Bucket bucket : amazonS3Client.listBuckets()){
        System.out.println("Bucket in Amazon S3 :"+bucket.getName());
        }
       
        System.out.println("Folder is being created ................");
        String newFolderName = "Folder_by_Java_Code";
        App demo = new App();
        //demo.createNewFolder(bucketName, newFolderName, amazonS3Client);
        String fileName = "demotextfile.txt";
        amazonS3Client.putObject(new PutObjectRequest(bucketName, fileName, new File("D:\\demotextfile.txt")));
       
        System.out.println("All Done ............");
       
    }
   
    private void createNewFolder(String bucketName, String newFolderName, AmazonS3 amazonClient){
    ObjectMetadata metaData = new ObjectMetadata();
    metaData.setContentLength(0);
   
    InputStream emptyContent = new ByteArrayInputStream(new byte[0]);
   
    PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, newFolderName, emptyContent, metaData);
   
    amazonClient.putObject(putObjectRequest);
    }
}