What is the use of ContextLoaderListener in Spring MVC?
ContextLoaderListener creates a root web-application-context for the web-application and puts it in the ServletContext. This context can be used to load and unload the spring-managed beans ir-respective of what technology is being used in the controller layer(Struts or Spring MVC).
What is DispatcherServlet What is the role of IT in Spring MVC?
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.
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.
Can we have multiple DispatcherServlet?
You can have as many DispatcherServlets as you want. Basically what you need to do is duplicate the configuration and give the servlet a different name (else it will overwrite the previous one), and have some separate configuration classes (or xml files) for it.
Can we have more than one DispatcherServlet in Spring MVC?
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.
Does Spring boot have DispatcherServlet?
Can we use RestController in Spring MVC?
The @RestController annotation in Spring MVC is nothing but a combination of the @Controller and the @ResponseBody annotation. It was added into Spring 4.0 to make the development of RESTful Web Services in Spring framework easier.
What is contextloaderlistener in DispatcherServlet?
When DispatcherServlet starts up, it creates a Spring application context and starts loading it with beans declared in the configuration files or classes that it’s given. But in Spring web applications, there’s often another application context. This other application context is created by ContextLoaderListener
What is servletcontext in DispatcherServlet?
DispatcherServlet entries create one child application context per servlet entry. Child contexts can access beans defined in root context. Beans in root context cannot access beans in child contexts (directly). All contexts are added to ServletContext.
What beans are included in DispatcherServlet’s web application context?
Well, general beans such as services and DAOs make their way in root Web Application Context, and more web-specific beans such as controllers are included in DispatcherServlet’s Web Application Context. Show activity on this post.
How can I have multiple dispatcherservlets in an application?
One can have multiple DispatcherServlet instances in an application, and each will have its own WebApplicationContext. The root WebApplicationContext is shared across the application, so if you have a root WebApplicationContext and multiple DispatcherServlets, the DispatcherServlets will share the root WebApplicationContext.