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What are the different types of controllers in Spring MVC?
Spring MVC also offers several controller classes designed for specific purposes, including:
- AbstractUrlViewController.
- MultiActionController.
- ParameterizableViewController.
- ServletForwardingController.
- ServletWrappingController.
- UrlFilenameViewController.
What is a controller class in spring?
Controller – A controller contains the business logic of an application. Here, the @Controller annotation is used to mark the class as the controller. Front Controller – In Spring Web MVC, the DispatcherServlet class works as the front controller. It is responsible to manage the flow of the Spring MVC application.
Why controller is used in spring?
This is a good thing to perform the separation of concerns pattern. @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.
Can we have multiple controllers in Spring MVC?
In Spring MVC, we can create multiple controllers at a time. It is required to map each controller class with @Controller annotation.
Where we can declare Spring MVC controller?
Our conventional servlet based Spring MVC application with a simple controller is ready, just export it as the WAR file and deploy on Tomcat or any other servlet container. Then go to URL https://localhost:8080/Spring-Controller/hello and you should see the following screen as output.
What does @service do Spring?
The @Component annotation marks a java class as a bean so the component-scanning mechanism of spring can pick it up and pull it into the application context. The @Service annotation is also a specialization of the component annotation.
Can we have more than one DispatcherServlet in Spring MVC?
Yes, a Spring MVC web application can have more than one DispatcherServlets. Each DispatcherServlet has to operate in its own namespace. It has to load its own ApplicationContext with mappings, handlers, etc. Only the root application context will be shared among these Servlets.
How many controllers can we have in Spring?
Is it a good practice to have multiple controllers in spring MVC application? – Quora. It is always a good practice to separate business into multiple logical modules and for each module, you can have one controller. Example: For admin module, you can create one single controller with all required action methods.
How to create multiple controllers in Spring MVC?
In Spring MVC, we can create multiple controllers at a time. It is required to map each controller class with @Controller annotation. Here, we see a Spring MVC example of multiple controllers. The steps are as follows:
Which is the backbone of Spring MVC applications?
Spring Controller is the backbone of Spring MVC applications. This is where our business logic starts. Furthermore, RestController helps us in creating rest based web services easily. You can download the example project code from our GitHub Repository. Building a Dockerfile – All you need to know!
What does The DispatcherServlet mean in Spring MVC?
Meet the DispatcherServlet. Spring MVC’s DispatcherServlet handles every incoming HTTP request (that’s it is also called front controller ). Now, what does handle mean, exactly? Imagine a “register user workflow”, where a user fills out a form and submits it to the server to get a nice little success HTML page back.
What does spring @ restcontroller annotation do in spring?
Spring @RestController is a convenience annotation that is itself annotated with @Controller and @ResponseBody. This annotation is used to mark a class as request handler for RESTful web services.