In the previous example, we fronted our BookRepository interface with a REST controller in order to expose the data behind it via a web RESTful API. While this is definitely a quick and easy way to make the data accessible, it does require us to manually create a controller and define the mappings for all the desired operations. To minimize the boilerplate code, Spring provides us with a more convenient way: spring-boot-starter-data-rest. This allows us to simply add an annotation to the repository interface and Spring will do the rest to expose it to the web.
We will continue from where we finished in the previous recipe, and so the entity models and the BookRepository interface should already exist.
