@Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        switch(columnIndex){
            case 0:
                return list.get(rowIndex).getSpEmployeeTargetPK().getSzYear();
            case 1:
                return list.get(rowIndex).getSpEmployeeTargetPK().getSzMonth();
            case 2:
                return list.get(rowIndex).getIntWorkingDay();
            case 3:
                return list.get(rowIndex).getSzWorkPlaceId();
            default:
                return null;
        }
    }