Sample client and server using content type negotiation in Spring MVC.
Server is a Spring Boot application, run ./gradlew server:bootRun to start it.
Uncomment additional controller method in com.adjectivecolournoun.contenttype.server.controllers.ThingController to enable version 3 Things.
A Swagger UI describing the API is available at http://localhost:8080/sdoc.jsp courtesy of swagger-springmvc.
Client is a Groovy script supporting version one, two and three Things. Run ./gradlew client:runClient to request Things from server