angular send post request but servlet keep showing nul value

i have angular controller which triggered with ng-click:

app.controller('showAllWorkersContoller', function($scope, $http){
$http.get("/SafetyManager/workers").success(function(response){
    $scope.workers = response;
    $scope.workerInfo = function(id){
        $http({
            url: '/SafetyManager/workers',
            method: "POST",
            data: { 'ID' : id },
        }).success(function(response){
                $scope.info = response;
            });
    };
});

});

and when i check on chrome debug it sends in form data: {'ID':"1"} (or any other id num according to the worker i click on)

but when the Servlet get the request:

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    System.out.println("post request to Workers (get worker by id )");
    String id = request.getParameter("ID");
    System.out.println("this id is: " + id);


}

its print :

post request to Workers (get worker by id )

this id is: null

how can i get the ID value in the servlet?