How to send request from angularjs controller to spring controller?

See more:

MVC4

AngularJs

Spring

i am making SPA using AngularJS in Spring 4 with Hibernate 5. i can't able to send request from AngularJS controller to Spring Controller.

execution coming inside submit() function successfully, but it's going fail.

error shows in browser console:

angular.js:12011 POST http://localhost:8050/Spring_Hibernate_MVC/registerStudent 404 (Not Found)

my project structure is like below.

Spring_Hibernate_MVC

=src
-com->karmesh->mvcApp->controller->register->RegisterController.java
=WebContent
-js->app->RegisterController.js
-Views->Register.html

Register.html

<div id="DivRegisterMain" ng-controller="RegisterController as ctrl">

    <form name="myForm" novalidate>
    :
    :
    :
    <input type="submit" value="Submit" ng-click="submit()" ><br>
</form>
</div>

app.js

var routeApp=angular.module("RouteApp",['ngRoute']);

RegisterController.js

routeApp.controller("RegisterController", function($scope, $http) {
:::://some code is here
$scope.submit = function() {

        var req = {
                 method: 'POST',
                 url: '/registerStudent',               
                 data: $scope.studentList
                };

        $http(req).
        then(function(response){
            console.log(response.status);
            console.log("in success");
            $scope.studentList=[];
        }, function(response){
            console.log(response.status);
            console.log("in fail");     
        });
    };
});

web.xml

<servlet>
        <servlet-name>springServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/spring.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springServlet</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

RegisterController.java

@RestController
@RequestMapping("/")
public class RegisterController {

    @Autowired
    private RegisterService registerService;


    @RequestMapping(value="/registerStudent", method = RequestMethod.POST)  
    public ResponseEntity<RegisterDTO> registerStudent(@RequestBody List<RegisterDTO> stdList) {    


        if (registerService.isStudentExist(stdList)) {
            return new ResponseEntity<RegisterDTO>(HttpStatus.CREATED);
        }

        return new ResponseEntity<RegisterDTO>(HttpStatus.CREATED);

    }
}

What I have tried:

i tried to giving full url,

url: 'http://localhost:8050/Spring_Hibernate_MVC/registerStudent'

but it's also not working