jQuery select三级联动

/**
     * 三级联动
     * @param id 父类id
     * @return
     */
    @RequestMapping(value = "/Options", method = { RequestMethod.POST, RequestMethod.GET})
    @ResponseBody
    public List<Map<String, Object>> Options(int id){
        List<Map<String, Object>> dataList=new ArrayList<Map<String,Object>>();
        try {
            if(id!=null && id!=0){
                List<Item> items=itemService.getAllName(id);
                for (Item i : items) {
                    Map<String, Object> map=new HashMap<String, Object>();
                    map.put("id", i.getId());
                    map.put("name", i.getName());    
                    dataList.add(map);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dataList;
    }        

$().ready(function() {

    $("#oneId").on("change",function(){
        var oneId = $("#oneId").val();
        $("#twoId").html("<option value=‘0‘>--请选择--</option>");
        $("#threeId").html("<option value=‘0‘>--请选择--</option>");
        $.ajax({
            url: "Options.action",
            type: "POST",
            data: {
                itemCatId:oneId //一级类目id
            },
            dataType: "json",
            success: function(data) {
                $.each(data, function(idx, obj) {
                    $("#twoId").append("<option value=‘"+obj.id+"‘>" + obj.name + "</option>");
                });
            }
        });    
    });
    $("#twoId").change(function () {
        var twoId = $("#twoId").val();
        $("#threeId").html("<option value=‘0‘>--请选择--</option>");
        $.ajax({
            url: "Options.action",
            type: "POST",
            data: {
                itemCatId:twoId//二级类目id
            },
            success: function(data) {
                $.each(data, function(idx, obj) {
                    $("#threeId").append("<option value=‘"+obj.id+"‘>" + obj.name+ "</option>");
                });
            }
        });    
    });
});   

页面代码就不贴了，此三级联动是在绑定好一级分类的基础上进行的，oneId，twoId，threeId分别指一，二，三级select的id