Spring Boot Spring Version Upgrade

Upgrading Spring Boot is straightforward. The easiest method uses Spring Initializr (start.spring.io) to generate a new project with your desired Spring Boot version. Compare the `pom.xml` (Maven) or `build.gradle` (Gradle) files to identify dependency changes. **Maven (`pom.xml`) example:** ```xml org.springframework.boot spring-boot-starter-web 3.1.0 ``` **Gradle (`build.gradle`) example:** ```gradle dependencies { implementation("org.springframework.boot:spring-boot-starter-web:3.1.0") // Update version here } ``` Manually updating existing projects requires: 1. **Changing the parent POM:** Update the Spring Boot parent version in your `pom.xml` `` tag. For example, `org.springframework.bootspring-boot-starter-parent3.1.0`. 2. **Updating dependencies:** Check for updated dependencies in the release notes (search "Spring Boot [new version] release notes"). Manually change versions accordingly. 3. **Addressing deprecations:** The compiler and IDE will highlight deprecated APIs. Refactor your code to use updated alternatives. 4. **Testing:** Thoroughly test your application after upgrading to ensure everything works as expected. Remember to always consult the official Spring Boot release notes for detailed upgrade instructions and potential breaking changes. Use a version control system (e.g., Git) for easy rollback if needed.