In Eclipse (STS) I created a project as follows: File -> New -> Spring Starter Project
The settings are (among others): Type: Maven Project Packaging: War Java Version: 1.8 Language: Java Boot Version: 1.3.0 Dependencies: Web
In the project facets it leads to Dynamic Web Module = 3.1, however I need 3.0.
Manually setting it to 3.0 leads to "Cannot change version of project facet Dynamic Web Module to 3.0". Besides this error message I am sure this is not the right way to change it because the project will be shared to others.
I guess there is a maven way. Maybe the solution is somewhere here: http://docs.spring.io/spring-boot/docs/1.3.0.RELEASE/maven-plugin/plugin-info.html.
Unfortunately Spring Boot and Maven are not my special topics (yet).