controller

    @GetMapping("/getlist")
    public Map<String, Object> getAllQuestionWithStudentByPage() { 
        Map<String, Object> map = new HashMap<>();
        List<UserRecordVo> list=userRecordService.getListstate();
        if (null != list) {
            map.put("list", list);
        } else {
            map.put("success", false);
        }
        return map;
    }

html

    <select  id="state" name="state" style="width: 150px;height: 35px;"> </select>

ajax

        $.ajax({
            type : 'get',
            url : '/UserRecord/getlist',
            dataType : 'json',
            success : function(data) {
                data.list.map(function (item, index) {
                    $("#state").append("<option value="+(index+1)+">"+item.state+"</option>");
                });
            },
            error : function() {
            }
        });