Amazon S3 with Spring Boot Application

today's tasty java bite

1. Introduction

In this sample application, you will learn

• Create an Amazon IAM use with permission to read/write on S3 bucket
• Create/Delete S3 Bucket from CLI and Java
• Retrieve and delete files in S3 Bucket

2. Prerequisites

To use this application, we need to have below software and access

• Intellij IDE with AWS plugins
• Java
• Maven
• AWS account logins

3. Maven Dependencies

We are using spring boot starter parent to include all spring boot related dependencies

<parent>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-parent</artifactId>
	<version>2.7.2</version>
</parent>

Amazon SDK and spring cloud dependency

<dependency>
	<groupId>org.springframework.cloud</groupId>
	<artifactId>spring-cloud-aws-context</artifactId>
	<version>2.2.6.RELEASE</version>
</dependency>

<dependency>
	<groupId>com.amazonaws</groupId>
	<artifactId>aws-java-sdk</artifactId>
	<version>1.12.272</version>
</dependency>

4. Intellij AWS ToolKit Plugin

• Goto File->Settings->Plugins
• Install AWS Toolkit plugin

5. Select AWS Profile and User credentials

• In bottom right corner, select aws profile
• In bottom right corner, select aws profile
• search for aws_access_key_id and replace with IAM User key id
• search for aws_secret_access_key and replace with IAM User key id

5. Application Configuration

Create Amazon S3 client to interact with S3

    @Bean
    public AmazonS3 s3client() {
        AmazonS3 amazonS3Client = AmazonS3ClientBuilder.standard()
                .withRegion(Regions.fromName(region))
                .withCredentials(new ProfileCredentialsProvider("default"))
                .build();
        return amazonS3Client;
    }

AWS SDK CLI

Install AWS SDK Cli

• Update entries in the file C:\Users<>.aws
• run below command to list all buckets

aws s3 ls

create S3 bucket

aws s3api create-bucket --bucket <bucket unique name> --region <region ex:us-east-1>

License

MIT

Free Software, Hell Yeah!