Ray's Galactic Tech

Oct 10, 2025 · Backend Development

Step-by-Step Guide to Migrating Spring Boot 2.x to 3.x (2024)

This practical guide walks you through every stage of upgrading a Spring Boot 2.x application to 3.x, covering pre‑migration preparation, dependency changes, code refactoring, security configuration updates, configuration file adjustments, third‑party library compatibility, common pitfalls, verification steps, and optional native image building.