What's the intended use of `servlet-context.xml`, `root-context.xml` and `web.xml`?

Question

I a new to Java Spring MVC web development. I am kind of confused by the 3 config files below. They are auto created by the STS webmvc project template.

• What\'s t

Answer 1

Create a file name "javax.servlet.ServletContainerInitializer" (without quotes) the file content will be fully qualified name of the class implementing this interface, put the file here /META-INF/services

You may implement ServletContainerInitializer and override the method like this

public class CourtServletContainerInitializer implements ServletContainerInitializer {

    @Override
    public void onStartup(Set> c, ServletContext ctx) throws ServletException {
        AnnotationConfigWebApplicationContext applicationContext = new AnnotationConfigWebApplicationContext();
        applicationContext.register(CourtConfiguration.class);

        DispatcherServlet dispatcherServlet = new DispatcherServlet(applicationContext);

        ServletRegistration.Dynamic registration = ctx.addServlet("court", dispatcherServlet);
        registration.setLoadOnStartup(1);
        registration.addMapping("/");

    }

}

After this you do not need web.xml

Do remember if you are using maven to build your application mention this in pom.xml

        false

Before that you have to write a configuration class using @Configuration and @Bean annotations

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@ComponentScan(basePackages = "com.practice.learnspringmvc.*")

public class CourtConfiguration {

    @Bean
    public InternalResourceViewResolver internalResourceViewResolver() {
        InternalResourceViewResolver internalResourceViewResolver = new InternalResourceViewResolver();
        internalResourceViewResolver.setPrefix("/WEB-INF/views/");
        internalResourceViewResolver.setSuffix(".jsp");
        return internalResourceViewResolver;
    }
}

This configuration class replaces your initializers from servlet-context.xml