https://devops-monk.com/tags/migration/Recent content in Migration on Devops MonkHugoen-usSun, 03 May 2026 00:00:00 +0000https://devops-monk.com/tutorials/spring-boot/spring-boot-3-to-4-migration/Sun, 03 May 2026 00:00:00 +0000https://devops-monk.com/tutorials/spring-boot/spring-boot-3-to-4-migration/Migrating from Spring Boot 3.x to 4.0 is straightforward if you’ve kept up with deprecation warnings. This guide walks through every step — from dependency updates to API changes — with before/after examples. Pre-Migration: Fix Boot 3 Deprecations Before bumping the version, fix all deprecation warnings in your current Boot 3.x project. Every deprecated API in Boot 3 is removed in Boot 4. In IntelliJ IDEA: Analyze → Code Cleanup with “Remove deprecated usages” enabled.https://devops-monk.com/2026/05/spring-boot-migration-guide/Sun, 03 May 2026 00:00:00 +0000https://devops-monk.com/2026/05/spring-boot-migration-guide/Many teams are still running Spring Boot 2.7.x. Spring Boot 2.x reached end of life in November 2023, which means no more security patches. The jump to 4.0 is two generations, and the breaking changes are real — but they are also well-documented and mostly automatable. This guide walks through the migration in stages: 2.x → 3.0 first, then 3.x incremental updates, then 4.0. Each section lists what breaks and how to fix it.