DeutschOne of the more significant library updates that come with Spring Boot 4 is Jackson 3, which is the default JSON processing library for Spring Boot.
If you’re using Jackson heavily in your application, particularly when it comes to customising its behaviour, chances are you’ll need to adapt your code to the new version
To help you with this transition, software engineer and Spring developer advocate Dan Vega has published this article on the subject of Jackson 3 in Spring Boot 4: JsonMapper, JSON Views, and What’s Changed