Scala code for accessing Amazon S3 using AWS SDK for Java. Add dependency to sbt libraryDependencies: "com.amazonaws" % "aws-java-sdk" % "1.3.32"

S3Access.scala

import com.amazonaws.auth.BasicAWSCredentials
import com.amazonaws.services.s3.AmazonS3Client
import com.amazonaws.AmazonClientException
import com.amazonaws.AmazonServiceException
import java.io.File
import java.io.BufferedReader
import java.io.InputStreamReader
import java.io.FileOutputStream
import org.apache.commons.io.IOUtils 

val BUCKET_NAME = "###"
val FILE_PATH = "###"
val FILE_NAME = "###"
val AWS_ACCESS_KEY = "******************"
val AWS_SECRET_KEY = "******************"
 
try {
  val awsCredentials = new BasicAWSCredentials(AWS_ACCESS_KEY, AWS_SECRET_KEY)
  val amazonS3Client = new AmazonS3Client(awsCredentials)
  
  // create a new bucket
  amazonS3Client.createBucket(BUCKET_NAME)
  
  // upload file
  val file = new File(FILE_PATH)
  amazonS3Client.putObject(BUCKET_NAME, FILE_NAME, file)
  
  // download file and read line by line
  val obj = amazonS3Client.getObject(BUCKET_NAME, FILE_NAME)
  val reader = new BufferedReader(new InputStreamReader(obj.getObjectContent()))
  var line = reader.readLine
  while (line!=null) {
    println(line)
    line = reader.readLine
  }
  
  // download file and write to local file system
  val obj = amazonS3Client.getObject(BUCKET_NAME, FILE_NAME)
  val bytes = IOUtils.toByteArray(obj.getObjectContent())
  val file = new FileOutputStream(FILE_NAME)
  file.write(bytes)
  
} catch {
  case ase: AmazonServiceException => System.err.println("Exception: " + ase.toString)
  case ace: AmazonClientException => System.err.println("Exception: " + ace.toString) 
}