Spring MVC - WebApplicationInitializer Examples

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

public class MyWebInitializer implements WebApplicationInitializer {

    @Override
    public void onStartup (ServletContext servletContext) throws ServletException {
        AnnotationConfigWebApplicationContext ctx =
                  new AnnotationConfigWebApplicationContext();
        ctx.register(MyWebConfig.class);
        ctx.setServletContext(servletContext);

        ServletRegistration.Dynamic servlet =
                  servletContext.addServlet("springDispatcherServlet",
                                            new DispatcherServlet(ctx));

        servlet.setLoadOnStartup(1);
        servlet.addMapping("/");
    }
}