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Now build the war (either by eclipse as was mentioned in previous tutorials) or via maven command line( : For those of us, who prefer to deploy and run from within eclipse, and might be facing difficulties setting Eclipse with tomcat, the detailed step-by-step solution can be found at : How to setup tomcat with Eclipse.
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Clients can specify (using HTTP Accept header) the resource type they are interested in, and server may return the resource , specifying Content-Type of the resource it is serving. While doing that, Spring will [behind the scenes] use HTTP Message converters to convert the return value to HTTP response body [serialize the object to response body], based on Content-Type present in request HTTP header. Good thing about it is that you can control anything that goes into it. It comes with several constructors to carry the information you want to sent in HTTP Response.
Origin is not allowed by Access-Control-Allow-Origin.” are common in such case. Basically, on server side, we can return additional CORS access control headers with response, which will eventually allow further inter-domain communication.
With Spring, we can write a simple filter which adds those CORS specific headers in each response.
Recall from step 4 that we have already provided the properties file(messages.properties) containing custom messages to be used in case of validation failure.
Rest of annotations are validation related (JSR303).This Stack Overflow link is a must read to understand REST in detail. As already mentioned, in Spring 4, you may stop using this annotation. @Path Variable This annotation indicates that a method parameter should be bound to a URI template variable [the one in ''].Following is one possible Rest based controller, implementing REST API. Basically, @Rest Controller , @Request Body, Response Entity & @Path Variable are all you need to know to implement a REST API in Spring 4. Request Method; import com.websystique.springmvc.model. Employee; import com.websystique.springmvc.service. Employee Service; @Controller @Request Mapping("/") public class App Controller contains the outcome of this validation and any error that might have occurred during this validation. If you like tutorials on this site, why not take a step further and connect me on Facebook , Google Plus & Twitter as well?