code: public static Object getService(String name, ServletContext sc) {
  		AppContextWrapper acw = new ServletContextWrapper(sc);
  		ServiceFacade serviceFacade = new ServiceFacade();
  		ServiceFactory serviceFactory = serviceFacade.getServiceFactory(acw);
  		return serviceFactory.getService(name, acw);
  	}
docs: Difference with getComponentInstance method: 1. this method return new
  service instance each times.
  
  2. call methods of the return service instance, will active interceptors.
  execept some interceptors about session, such as Stateful disable.
  
  3. not support session ,if you need your jsp page not create cookie with
  JSESSIONID, use this method.
  
  
  @param name
  @param sc
  @return