Difference Betwixt @Restcontroller In Addition To @Controller Tone Inwards Leap Mvc In Addition To Rest

The @RestController notation inwards Spring MVC is aught but a combination of @Controller together with @ResponseBody annotation. It was added into Spring 4.0 to brand the evolution of RESTful Web Services inwards Spring framework easier. If yous are familiar amongst the REST spider web services yous know that the cardinal deviation betwixt a spider web application together with a REST API is that the response from a spider web application is mostly sentiment (HTML + CSS + JavaScript) piece REST API exactly render information inwards shape of JSON or XML. This deviation is equally good obvious inwards the @Controller together with @RestController annotation. The chore of @Controller is to create a Map of model object together with honor a sentiment but @RestController merely render the object together with object information is straight written into HTTP response equally JSON or XML.

This tin equally good endure done amongst traditional @Controller together with usage @ResponseBody notation but since this is the default conduct of RESTful Web services, Spring introduced @RestController which combined the conduct of @Controller together with @ResponseBody together.

In short, next ii code snippet are equal inwards Spring MVC:

@Controller @ResponseBody public class MVCController {     .. your logic }  @RestController public class RestFulController {    .... your logic }

Obviously, everybody would similar to declare exactly ane notation instead of two. Also, the @RestController is to a greater extent than obvious together with telling than the previous two.

What are @Controller together with @RestController inwards Spring?

In Spring framework, Influenza A virus subtype H5N1 Controller is a course of education which is responsible for preparing a model Map amongst information to endure displayed past times the sentiment equally good equally choosing the correct sentiment itself. It tin equally good straight write into response current past times using @ResponseBody notation together with consummate the request.

The conduct of writing straight into response current is rattling useful for responding calls to RESTful spider web services because their nosotros exactly render information instead of returning a sentiment equally explained inwards my before transportation virtually how Spring MVC industrial plant internally.

If yous conduct keep developed RESTful Web services before Spring four e.g. inwards Spring iii or Spring 3.1, yous would conduct keep been familiar amongst using a combination of @Controller together with @ResponseBody to create a RESTful response. Spring guys accept cognizant of this issues together with created @RestController.

Now, yous don't involve to usage @Controller together with @RestponseBody annotation, instead yous tin usage @RestController to render the same functionality. In short, it is a convenience controller which combines conduct of @Controler together with @Response trunk into one.

You tin farther bring together Eugen Paraschiv's REST amongst Spring Master class if yous are to a greater extent than curious virtually learning the advanced techniques to railroad train RESTFul Web Service inwards Spring.

Difference betwixt @RestController together with @Controller inwards Spring

Now that, yous are familiar amongst both of these annotations, it's a proficient fourth dimension to analyze roughly factual deviation betwixt @RestController together with @Controler. This is a rattling of import concept, non exactly from Interview dot of sentiment but equally good from Spring Core together with Spring Web Application developer Certification. If yous are preparing for Spring certifications, yous should familiar amongst such subtle differences. Additionally, yous tin equally good accept a expect at gratuitous Spring tests to acquire an thought virtually examination format together with grade of questions.

Anyway, let's acquire dorsum to the point, hither are roughly of import differences betwixt these ii annotations.

1. The @Controller is a mutual notation which is used to score a course of education equally Spring MVC Controller piece @RestController is a particular controller used inwards RESTFul spider web services together with the equivalent of @Controller + @ResponseBody.

2. The @RestController is relatively new, added entirely on Spring 4.0 but @Controller is an one-time annotation, exists since Spring started supporting annotation, officially it was added on Spring 2.5 version.

3. The @Controller notation indicates that the course of education is a "Controller" e.g. a spider web controller piece @RestController notation indicates that the course of education is a controller where @RequestMapping methods assume @ResponseBody semantics past times default i.e. servicing REST API.


4. The @Controller is a specialization of @Component notation piece @RestController is a specialization of @Controller annotation. It is truly a convenience controller annotated amongst @Controller together with @ResponseBody equally shown below.

@Target(value=TYPE)
@Retention(value=RUNTIME)
@Documented
@Controller
@ResponseBody
public @interface RestController

together with hither is how the proclamation of @Controller looks like:

@Target(value=TYPE)
@Retention(value=RUNTIME)
@Documented
@Component
public @interface Controller


5. One of the key deviation betwixt @Controler together with @RestCotroller inwards Spring MVC is that in ane lawsuit yous score a course of education @RestController therefore every method is written a domain object instead of a view. You tin meet Bryan Hassen's RESTful response yous involve to annotate each method amongst the @ResponseBody annotation, which is non required when yous usage @RestController. It non entirely makes your code to a greater extent than readable but equally good saves a distich of key strokes for you.


Here is a uncomplicated HelloWorld event using @RestController together with SpringBoot framework:

That's all virtually the difference betwixt @Controller together with @RestController notation inwards Spring MVC together with REST. @RestController is aught but the shortcut to usage both @Controller together with @ResponseBody notation together.

Spring purposefully added this notation inwards Spring four to brand the evolution of RESTful spider web services easier using Spring framework. It tin straight convert the response to JSON or XML depending upon MIME type of request.

So, if yous are creating a RESTful Web Services it's ameliorate to usage @RestController than combining @Controller to @ResponseBody.

If yous desire to acquire to a greater extent than virtually developing RESTful Web Services using Spring together with Spring Security framework, I advise yous bring together Eugen Paraschiv's REST amongst Spring Coaching class. Eugen has roughly proficient existent basis sense inwards developing together with securing RESTful spider web services inwards Java together with this course of education is a proficient chance to practise goodness from his immense experience.


Other Spring related articles yous may similar to explore this blog

• Spring Framework 5: Beginner to Guru (see)
• 23 Spring MVC Interview questions for 2 to iii years experienced (list)
• What is the usage of DispatcherServlet inwards Spring MVC? (answer)
• How to enable Spring safety inwards Java application? (answer)
• Does Spring certification handle inwards Job together with Career? (article)
• Top five Spring Certification Mock Exams (list)
• Difference between @Autowired together with @Injection annotations inwards Spring? (answer)
• 5 Spring together with Hibernate online courses for Java developers (list)
• Spring inwards Action past times Craig Walls fourth Edition (see)

Thanks for reading this article. If yous similar this article therefore delight part amongst your friends together with colleagues. If yous conduct keep whatever questions or feedback therefore delight drib a comment together with I'll endeavour to reply it equally shortly equally possible.

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