How do you upload and download files to Google Cloud Storage in Spring Boot?

Table of Contents

• Introduction
• Uploading Files to Google Cloud Storage
  • Step 1: Add Dependencies
  • Step 2: Configure Google Cloud Credentials
  • Step 3: Implement File Upload Logic
  • Example Usage
• Downloading Files from Google Cloud Storage
  • Step 1: Implement File Download Logic
  • Example Usage
• Practical Example: REST Controller for File Upload and Download
• Conclusion

Introduction

Google Cloud Storage is a robust solution for managing files in the cloud. In Spring Boot, you can easily upload and download files using the Google Cloud Storage client library. This guide demonstrates how to implement file upload and download functionalities with practical examples.

Uploading Files to Google Cloud Storage

Step 1: Add Dependencies

Add the required dependency for Google Cloud Storage in your pom.xml:

Step 2: Configure Google Cloud Credentials

Ensure the service account credentials JSON file is configured in application.properties:

Alternatively, set the GOOGLE_APPLICATION_CREDENTIALS environment variable:

Step 3: Implement File Upload Logic

Use the Storage client to upload files to a specific bucket:

Example Usage

Downloading Files from Google Cloud Storage

Step 1: Implement File Download Logic

Use the Storage client to retrieve files from a bucket:

Example Usage

Practical Example: REST Controller for File Upload and Download

You can expose file operations via REST APIs:

Conclusion

Uploading and downloading files to Google Cloud Storage in Spring Boot is straightforward with the Google Cloud Storage client library. By configuring your credentials and utilizing the Storage client, you can efficiently manage files in your application. The examples provided here, including a REST controller, demonstrate how to build robust file-handling functionalities.