public class MyWebApplicationInitializer implements WebApplicationInitializer {

    @Override

    public void onStartup(ServletContext servletCxt) {

        // Load Spring web application configuration

        AnnotationConfigWebApplicationContext ac = new AnnotationConfigWebApplicationContext();

        ac.register(AppConfig.class);

        ac.refresh();

        // Create and register the DispatcherServlet

        DispatcherServlet servlet = new DispatcherServlet(ac);

        ServletRegistration.Dynamic registration = servletCxt.addServlet("app", servlet);

        registration.setLoadOnStartup(1);

        registration.addMapping("/app/*");

    }

}

<web-app>

    <listener>

        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

    </listener>

    <context-param>

        <param-name>contextConfigLocation</param-name>

        <param-value>/WEB-INF/app-context.xml</param-value>

    </context-param>

    <servlet>

        <servlet-name>app</servlet-name>

        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <init-param>

            <param-name>contextConfigLocation</param-name>

            <param-value></param-value>

        </init-param>

        <load-on-startup>1</load-on-startup>

    </servlet>

    <servlet-mapping>

        <servlet-name>app</servlet-name>

        <url-pattern>/app/*</url-pattern>

    </servlet-mapping>

</web-app>

<servlet>

        <servlet-name>app</servlet-name>

        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <init-param>

            <param-name>contextConfigLocation</param-name>

            <param-value></param-value>

        </init-param>

        <load-on-startup>1</load-on-startup>

    </servlet>

    <servlet-mapping>

        <servlet-name>app</servlet-name>

        <url-pattern>/app/*</url-pattern>

    </servlet-mapping>