However when the class NumbersOfNewEvents is serialized it still contains all attributes in the json. One important point to note is, minimum requirement to using Spring 4 is Java SE6. I included the custom objectmapper as described here. Spring 4.0 Features Many improvements to Spring Core Container like generics as autowiring qualifiers, conditional annotation, ordered auto. You can find the source code for the article on GitHub.

What’s new in 2.4 Config File Processing (application properties and YAML files) Spring Boot 2.4 has improved the way that application.properties and application. For full upgrade instructions and new and noteworthy features please see the release notes. We've covered useful annotations that eliminate boilerplate, new helpful methods of dependency lookup and injection and several substantial improvements within the web and caching facilities. This release adds a significant number of new features and improvements.

My goal is to configure the objectMapper in the way that it only serialises element which are annotated with order to do so I followed this explanation which says how to configurate the objectmapper. In this article, we discussed some of the new features introduced with Spring 4.3.

Spring 4 new features