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- DispatcherServlet is the core of Spring MVC application. It loads Spring bean configuration file and initialize all the beans mentioned in config file.
- In case we have enabled annotations in Spring config file, it also scans the packages and configures any bean annotated with @Component, @Controller, @Repository or @Service annotations.
- ContextLoaderListener is a listener to start up and shut down Spring’s root WebApplicationContext. ContextLoaderListener links the lifecycle of ApplicationContext to the lifecycle of the ServletContext. It automates the creation of ApplicationContext. It can also be used to define shared beans used across different spring contexts.