AmazonS3Client(AWSCredentials awsCredentials) Constructs a new Amazon S3 client using the specified AWS credentials to access Amazon S3. AmazonS3Client(AWSCredentials awsCredentials, ClientConfiguration clientConfiguration) Constructs a new Amazon S3 client using the specified AWS credentials and client configuration to access Amazon S3. では1つずつ見て行きたいと思います。 AmazonS3Client() 引数ありの他のコンストラクタと違ってAWSサービ