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List; import org.springframework.beans.factory.annotation. At the at end of day, it’s just a plain controller class, part of a deploy-able application.[Complete downloadable application code is shown further down in post which you can deploy straight-away in your container].
Retrieve all users Open POSTMAN tool, select request type [GET for this usecase], specify the operation uri.
Of course sometime we do need to adapt our API/application as well.Under the hood, @Rest Controller is itself annotated with @Response Body, and can be considered as combination of @Controller and @Response Body.We will also test those services using external clients.Since spring finds this library in class path, it invokes inbuilt Mapping Jackson2Http Message Converter converter to convert the response (List of objects) into JSON.
Uri Components Builder; import com.websystique.springmvc.model. This annotation eliminates the need of annotating each method with @Response Body.Again, one may decide not to send the updated details in response body, and just send the location header(as in create).