Spring 5 RC1 will support Java 8+, but, basically, it aims to track and support greatly to the new bee Java 9. It will also support reactive programming Spring 5 with focus on HTTP 2.0. It also aims to focus on reactive programming through reactive architecture. Spring 5.0.RC1 supports reactive multipart request, Jackson 2.9. The access to the request and response objects has been simplified in WebClient. It also supports reactive types in return values by the Spring Controllers. It supports the JSON binding API. The mock.staticmock from spring-aspects, web.view.tiles2, has been dropped. No more support for Portlet, Velocity, JasperReports, XMLBeans, JDO, and Guava.

It can be summarized, as shown in the following figure: