Spring MVN Controller works in GET but does not in POST - spring-mvc

Question

I have this simple Controller
#Controller
#RequestMapping("/login")
public class LoginController {
private ModelAndView model;
#RequestMapping(value="/loginUser/{username}/{password}", method=RequestMethod.GET)
public ModelAndView loginUser(#PathVariable(value="username") String username, #PathVariable(value="password") String password) {
try {
if( checkCredential( username , password ) ) {
model = new LoginResult( "loginOK" );
model.addObject( "msg" , username );
} else {
model = new LoginResult( "loginKO" );
model.addObject( "msg" , "Impossible to login the user " + username );
}
} catch(Exception e) {
e.printStackTrace();
}
return model;
}
}
and this simple JSP to execute the login
<form method="get" action="/login/loginUser">
<div class="div-top-end-space"> </div>
<div>
<label class="form-label"><i class="fa fa-chevron-right fa-1"></i> USERNAME:</label>
<input class="form-input" type="text" name="username" ng-model="username" />
</div>
<div>
<label class="form-label"><i class="fa fa-chevron-right fa-1"></i> PASSWORD:</label>
<input class="form-input" type="password" name="password" ng-model="password" />
</div>
<div class="div-separator"></div>
<div>
<input type="submit" value="LOGIN" ng-disabled="checkCredential()"/>
</div>
<div class="div-top-end-space"> </div>
</form>
This code works properly, but I have to put into the URL
http://localhost:9001/MY_APP/login/loginUser/aaa/bbb
But I do not want that username and password are shown into the browser's URL.
So I change the method into the form in method="post" and into the controller, method="RequestMethod.POST".
When I run my application and I insert my username and password, it does not work, and into the URL I see this
http://localhost:9001/login/loginUser
Where did my application's name go???
How I can solve it?
Thanks to everybody.
Daniele.