Minio Object Store with Spring Boot 3

In this story, we’ll explore how to integrate MinIO with Spring Boot to perform bucket and object operations to any Amazon S3-compatible object storage service.

· Prerequisites
· Overview
∘ What is Minio?
∘ Key Benefits of Using Minio
· Setup Minio: MinIO Object Storage for Container
∘ Access MinIO
∘ Create a Bucket
· Spring Boot API
∘ Configure MinIO in Spring Boot
∘ Upload Object
∘ Download the file
∘ FileController
· Test the REST APIs
· Conclusion
· References

Prerequisites

This is the list of all the prerequisites:

• Spring Boot 3+
• Maven 3.6.3
• Java 21
• Docker / Docker-compose installed (optional if you’ve already downloaded and installed MinIO from https://min.io)
• Postman

Overview

What is Minio?

MinIO is a high-performance object storage released under dual licenses, GNU Affero General Public License v3.0 and MinIO Commercial License. It is API compatible with Amazon S3 cloud storage service. MinIO is built to deploy anywhere — public or private cloud, bare-metal infrastructure, orchestrated environments, and edge infrastructure.

Key Benefits of Using Minio

The benefits of Minio are listed below:

• S3 API Compatibility — Minio supports the Amazon S3 API, making it easy to integrate with existing S3-compatible applications.
• Data Redundancy — Using erasure coding, Minio ensures that data is replicated and distributed across multiple drives, protecting against data loss.
• High Availability — Minio can run in a distributed mode, ensuring continuous access even if some nodes or disks fail.
• Horizontal and Vertical Scaling — Minio scales out by adding more servers…