JSP页面中的下拉框不能显示取到的值

下拉框取不到返回的值
代码如下

<td>
                                    <select id="enterpriseNature" >
                                        <option value="">-请选择-</option>
                                    </select>
                                </td>

jquery代码：

    <script type="text/javascript" src="${pageContext.request.contextPath }/js/jquery-1.11.3.min.js"></script>
<script type="text/javascript">
    $(function(){
        //页面加载函数就会执行，页面加载函数就会执行查询字典

        $.post("${pageContext.request.contextPath }/baseDict_findByTypeCode.action",{"dict_type_code":"007"},function(data){
            //遍历JSON数据
            $(date).each(function(i,n){
                $("#enterpriseNature").append("<option value='"+n.dict_id+"'>"+n.dict_item_name+"</option>");
            });
        },"json");
    });
</script>

控制台也打印出值了

BaseDictAction中的findByTypeCode方法执行了....
Hibernate: 
    select
        basedict0_.dict_id as dict_id1_0_,
        basedict0_.dict_type_code as dict_typ2_0_,
        basedict0_.dict_type_name as dict_typ3_0_,
        basedict0_.dict_item_name as dict_ite4_0_,
        basedict0_.dict_item_code as dict_ite5_0_,
        basedict0_.dict_sort as dict_sor6_0_,
        basedict0_.dict_enable as dict_ena7_0_,
        basedict0_.dict_memo as dict_mem8_0_ 
    from
        base_dict basedict0_ 
    where
        basedict0_.dict_type_code=?
[{"dict_id":"16","dict_item_code":"","dict_item_name":"私营","dict_type_code":"007","dict_type_name":"企业性质"},{"dict_id":"17","dict_item_code":"","dict_item_name":"国企","dict_type_code":"007","dict_type_name":"企业性质"}]

求大神帮帮小白

应该是i.dict_id

n[i].dict_id