What is a DispatcherServlet?
The DispatcherServlet is the front controller in Spring web applications. It’s used to create web applications and REST services in Spring MVC. In a traditional Spring web application, this servlet is defined in the web. xml file.
Does Spring boot have DispatcherServlet?
A typical MVC database driven Spring MVC application requires a lot of configuration such as dispatcher servlet, a view resolver, Jackson, data source, transaction manager, among many others. Spring Boot auto-configures a Dispatcher Servlet if Spring MVC jar is on the classpath.
How dispatcher servlet is initialized in Spring?
Initialize the DispatcherServlet in the web server container and map the URL. After the initialization, DispatcherServlet will use org. springframework. web….Initialize and configure DispatcherServlet in Spring MVC
- Use the web. xml file.
- Use the web-fragment. xml file.
- Use javax. servlet. ServletContainerInitializer.
What are true with DispatcherServlet?
The Dispatcher servlet is the bit that “knows” to call that method when a browser requests the page, and to combine its results with the matching JSP file to make an html document. How it accomplishes this varies widely with configuration and Spring version. There’s also no reason the end result has to be web pages.
What is a DispatcherServlet Mcq?
Explanation: A Spring MVC controller—often referred to as a Dispatcher Servlet—implements one of Sun’s core Java EE design patterns called front controller. 2. Class used to give a class behavior of a Dispatcher Servlet.
Is web xml is DispatcherServlet?
The DispatcherServlet is an actual Servlet (it inherits from the HttpServlet base class), and as such is declared in the web. xml of your web application. Requests that you want the DispatcherServlet to handle will have to be mapped using a URL mapping in the same web. xml file.
What is DispatcherServlet where reside?
DispatcherServlet acts as front controller for Spring based web applications. It provides a mechanism for request processing where actual work is performed by configurable, delegate components. It is inherited from javax. servlet.
What is @ResponseBody?
The @ResponseBody annotation tells a controller that the object returned is automatically serialized into JSON and passed back into the HttpResponse object.
What is use of @RestController?
RestController: RestController is used for making restful web services with the help of the @RestController annotation. This annotation is used at the class level and allows the class to handle the requests made by the client.
What is @RequestBody and ResponseBody?
By using @RequestBody annotation you will get your values mapped with the model you created in your system for handling any specific call. While by using @ResponseBody you can send anything back to the place from where the request was generated. Both things will be mapped easily without writing any custom parser etc.
What is difference @controller and @RestController?
@Controller is used to mark classes as Spring MVC Controller. @RestController annotation is a special controller used in RESTful Web services, and it’s the combination of @Controller and @ResponseBody annotation. It is a specialized version of @Component annotation.
What is the purpose of @ResponseBody?