使用角度js将json数据发送到struts

Question

I am receiving data as null in my struts2 action class.

以下代码写在jsp页面上。将lineDetails发送到struts2动作类。     var app = angular.module（'myApp'，['ngRoute']）;     app.controller（'MyController'，['$ scope'，'$ http'，函数（$ scope，$ http）     {           var lineDetails = {lineId：0};

      var data=angular.toJson(lineDetails);

 $http.post("ActionClassName",data, {headers: {'Content-Type': 'application/json'} }).success(function(data, status, headers, config) {

        }).error(function(data, status, headers, config) {
            alert( "failure message: " );
         });
}]);

In my action class in am accessing the data variable which is printing null
 Gson gs=new GsonBuilder().serializeNulls().create();
             System.out.println("data is:"+data);