Migrating a Spring Boot 2 application
If you already have applications based on Spring Boot 2, you might be interested in understanding what it takes to migrate to Spring Boot 3.0. Here is a list of actions you need to take:
- Pivotal recommends first upgrading Spring Boot 2 applications to the latest v2.7.x release since their migration guide assumes you are on v2.7.
- Ensure you have Java 17 or later installed, in both your development and runtime environments. If your Spring Boot applications are deployed as Docker containers, you need to ensure that your company approves the usage of Docker images based on Java 17 or newer releases.
- Remove calls to deprecated methods in Spring Boot 2.x. All deprecated methods are removed in Spring Boot 3.0, so you must ensure that your application does not call any of these methods. To see exactly where calls are being made in your application, you can enable the
lint:deprecationflag in the Java compiler using the following (assuming the use of Gradle...
