Annotated Controller

I am trying to convert SimpleFormController to Annotated Controller 
(@Controoler). Can some one tell me how to convert the following code?

    private AppService appService;
    protected ServletContext g_application;

    public void initApplicationContext()
    {
       WebApplicationContext wac = getWebApplicationContext();
       this.appService = (AppService) 
wac.getBean(App_Const.APP_SERVICE_BEAN);
       g_application = this.getServletContext();
       g_application.removeAttribute(App_Const.APP_OBJECT);
       g_application.setAttribute(App_Const.APP_OBJECT, "0");
    }

I do need to get WebApplicationContext and ServletContext. Is there any 
way to do the same thing like initApplicationContext()?

-Henry

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