Getting null bean value in java rest while passing JSON array through $http in angularJs

Question

I want to send JSON array to my java rest metrthod which contains two same bean properties. Here's my Angular $http method

                  //Some code here
                  
                  tempJsonData = JSON.stringify(result);
	                jsonData="{\"employees\":"+tempJsonData+"}";
	                console.log(jsonData);
	                
	               //Get the first column first cell value
	               
	            };
	            
	            $http({
		    	    url: "rest/admin/upload",
		    	    method: "POST",
		    	    data: jsonData,
		    	    headers: {'Content-Type': 'application/json'}
		        
		        }).success(function(data, status, headers, config) {
		            if (data) {
		            
		                $scope.data = data;
		                //$("#popupmodal1").openModal();
		               
		            }
		        }).error(function(data, status, headers, config) {
		            alert("error");
		        })

And my Json (var jsonData in angular) Looks like:

{"employees":[{"key1":"value1","key2":"value2"},{"key1":"value3","key2":"value4"}]}

Here's my bean class:

import java.util.ArrayList;
import java.util.List;

public class EmployeeList {

    private ArrayList<EmployeeBean> employees;

    public ArrayList<EmployeeBean> getEmployees() {
        return employees;
    }

    public void setEmployees(ArrayList<EmployeeBean> employees) {
        this.employees = employees;
    }

}

This has only one property which is list of EmployeeBean. Here's my REST method:

@POST
@Path("/upload")
@Consumes({ MediaType.APPLICATION_JSON})
@Produces({ "application/json" })
public String upload(EmployeeList employees) {

if(employees!=null){
    for(EmployeeBean e:employees.getEmployees())
        System.out.println(e.getSignum());
}
else
    System.out.println("No data passed");

    return "{}";
}

But EmployeeList is not being populated, EmployeeList employees is always Null.

P.S.:

1)I have tried not creating separate class for List and passed List as a parameter to the rest directly, but still not working.

2)I have modified my JSON data from [{"key1":"value1"},{"key1":"value2"}] to {"employees":[{"key1":"value1"},{"key1":"value2"}]} Both not working.