Welcome file not working with html file in spring

Try adding <mvc:default-servlet-handler/> in your dispatcher-servlet.xml.

See here for details.

You have mapped all your incoming requests to the dispatcher here,

<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

So all your URL requests for the application goes inside the dispatcher as '/' maps all incoming requests . check for the stacktraces in your application server log

update:

You get the below warning because there are no handler for the '/' pattern,

WARNING: No mapping found for HTTP request with URI [/AccelFlow/] in DispatcherServlet with name 'dispatcher'

You can do either of below options ,

1. Map a url with '/' to the controller
2. Add a specific URL pattern to the spring dispatcher such as .htm or .do as you wish

Modify your web.xml,

<servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>*.htm</url-pattern>
    </servlet-mapping>  

And in your controller,

@RequestMapping(value = "/test.htm", method = RequestMethod.GET)
public @ResponseBody Response display() throws Exception {
    accelFlowFacade.disaply();
    Response res = new Response();
    return res;
}

At the startup by default all incoming requests are mapping to '/' pattern as you write in the web.xml:

<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

update:

1. Try to map a Controller method for the default view:

   @RequestMapping(value = "/", method = GET)
   public String welcome() {
       return "index";
   }
   

2. Add viewresolver to dispather-servlet.xml:

   <bean id="viewResolver"
         class="org.springframework.web.servlet.view.InternalResourceViewResolver"
         p:prefix="/"
         p:suffix=".jsp" />
   

3. Remove welcome file from the web.xml as automatically spring will search for index page by default:

   <welcome-file-list>
       <welcome-file>index.jsp</welcome-file>
   </welcome-file-list>