Spring 3.1 WebApplication Initialization

ContextInitializer.java

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

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

public class ContextInitializer implements WebApplicationInitializer {
  public void onStartup(ServletContext servletContext) throws ServletException {
    AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
    ctx.register(AppConfig.class);
    Dynamic servlet = servletContext.addServlet("dis", new DispatcherServlet(ctx));
    servlet.setLoadOnStartup(1);
    servlet.addMapping("/");
  }
}