Unable to Run Spring Based Web Application

I have developed a simple web project using spring 3.1 framework named "FirstSpringApp". But my problem is whenever I'm hitting the url in the browser(localhost:8087/FirstSpringApp-war),I'm getting the [B]error message
Resource not found.

I have followed the Spring mvc architecture throughout my project.
I'm attaching my project herewith it is developed using NetBeans IDE-7.3.1.

My Controller class is something like this::

@Controller
public class SpringWelcomeController extends AbstractController {

@Override
public ModelAndView handleRequestInternal(HttpServletRequest request, HttpServletResponse response) throws ServletException {
ModelAndView modelAndView = new ModelAndView("helloworld");
modelAndView.addObject("welcome_message", "Happy Programming");
return modelAndView;
}
}

This is my:welcomedispatcher-servlet.xml file

<context:component-scan base-package="com.edifixio.spring.controller"/>
<bean name="/index.jsp" class="com.edifixio.spring.controller.SpringWelcom eController"/>
<bean id="viewResolver" class="org.springframework.web.servlet.view.Intern alResourceViewResolver"
p:viewClass="org.springframework.web.servlet.view. JstlView"
p:prefix="/WEB-INF/helloworld.jsp"
p:suffix=".jsp"/>

and in web.xml file i have given:

<servlet>
<servlet-name>welcomedispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherSe rvlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>welcomedispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

can any one help?????????