What Is The Difference Between Controller And RestController In Spring?

What is difference between @PathVariable and @RequestParam in spring?

1) The @RequestParam is used to extract query parameters while @PathVariable is used to extract data right from the URI.

Even though both are used to extract data from URL, @RequestParam is used to retrieve query parameters, anything after .

in the URL, while @PathVariable is used to retrieve values from URI itself..

What is the use of @configuration in spring?

Spring @Configuration annotation is part of the spring core framework. Spring Configuration annotation indicates that the class has @Bean definition methods. So Spring container can process the class and generate Spring Beans to be used in the application.

Does spring boot use Spring MVC?

So, Spring MVC is a framework to be used in web applications and Spring Boot is a Spring based production-ready project initializer. You might find useful visiting the Spring MVC tag wiki as well as the Spring Boot tag wiki in SO.

What is @PathVariable in spring?

@PathVariable is a Spring annotation which indicates that a method parameter should be bound to a URI template variable. If the method parameter is Map then the map is populated with all path variable names and values. It has the following optional elements: name – name of the path variable to bind to.

What is the difference between Spring MVC and rest?

Spring’s annotation based MVC framework simplifies the process of creating RESTful web services. … While the traditional MVC controller relies on the View technology, the RESTful web service controller simply returns the object and the object data is written directly to the HTTP response as JSON/XML.

What is use of @autowired in spring?

Advertisements. The @Autowired annotation provides more fine-grained control over where and how autowiring should be accomplished. The @Autowired annotation can be used to autowire bean on the setter method just like @Required annotation, constructor, a property or methods with arbitrary names and/or multiple arguments …

What is @RequestParam in spring?

@RequestParam is a Spring annotation used to bind a web request parameter to a method parameter. It has the following optional elements: defaultValue – used as a fallback when the request parameter is not provided or has an empty value. name – name of the request parameter to bind to.

What is a RestController spring?

The @RestController annotation was introduced in Spring 4.0 to simplify the creation of RESTful web services. It’s a convenience annotation that combines @Controller and @ResponseBody – which eliminates the need to annotate every request handling method of the controller class with the @ResponseBody annotation.

What does a rest controller do?

Spring RestController annotation is a convenience annotation that is itself annotated with @Controller and @ResponseBody . … Spring RestController annotation is used to create RESTful web services using Spring MVC. Spring RestController takes care of mapping request data to the defined request handler method.

Is Spring MVC still used?

Yes, Java Spring is still relevant and popular in the development of highly secure, robust, scalable web application. But, with the continuous popularity in the JavaScript from past few years, it will be interesting to see whether the MEAN Stack and other emerging JavaScript framework like Node. JS can beat it or not.

What is @service annotation in spring?

@Controller annotation is an annotation used in Spring MVC framework (the component of Spring Framework used to implement Web Application). The @Controller annotation indicates that a particular class serves the role of a controller. … This class perform the business logic (and can call the services) by its method.

What is @qualifier in spring?

Advertisements. There may be a situation when you create more than one bean of the same type and want to wire only one of them with a property. In such cases, you can use the @Qualifier annotation along with @Autowired to remove the confusion by specifying which exact bean will be wired.

What are different types of Autowiring in spring?

Spring @Autowired Annotationautowire byName – For this type of autowiring, setter method is used for dependency injection. … autowire byType – For this type of autowiring, class type is used. … autowire by constructor – This is almost similar to autowire byType, the only difference is that constructor is used to inject the dependency.More items…•

Why do we use Spring MVC?

Rapid development – The Spring MVC facilitates fast and parallel development. Reusable business code – Instead of creating new objects, it allows us to use the existing business objects. Easy to test – In Spring, generally we create JavaBeans classes that enable you to inject test data using the setter methods.

What is @ResponseBody in spring?

@ResponseBody is a Spring annotation which binds a method return value to the web response body. It is not interpreted as a view name. It uses HTTP Message converters to convert the return value to HTTP response body, based on the content-type in the request HTTP header.