springboot中使用templates 根据选择树结构id 动态查询 数据 并赋值到input中

需求  动态根据选择的题库id 查询题库数量 动态赋值给input 限制出题数量

# 树结构数据展示题库

<div class="form-group">
     <label class="col-sm-3 control-label">题型：</label>
     <div class="col-sm-8">
     　　<input name="questionName" onclick="selectTree()" id="treeName" type="text" placeholder="请选择题型" class="form-control" required autocomplete="off">
     </div>
</div>

#需要赋值的input框

<div class="form-group">
        <label class="col-sm-3 control-label">单选题数量：</label>
        <div class="col-sm-8">
        　　<input name="singleChoiceNum" class="form-control" type="number" min = 0 autocomplete="off" id="singleChoiceNum">
        </div>
</div>

<div class="form-group">
       <label class="col-sm-3 control-label">多选题数量：</label>
       <div class="col-sm-8">
       　　<input name="multipleChoiceNum" class="form-control" type="number" min = 0 autocomplete="off" id="multipleChoiceNum">
       </div>
</div>

#获取树结构数据信息

function selectTree() {
            var treeId = $("#treeId").val();
            var questionType = $.common.isEmpty(treeId) ? "100" : $("#treeId").val();
            var url = ctx + "exam/question/selectQuestionTree/" + questionType;
            var options = {
                title: '选择题型',
                 "380",
                url: url,
                callBack: doSubmit
            };
            $.modal.openOptions(options);
        }
        function doSubmit(index, layero){
            var tree = layero.find("iframe")[0].contentWindow.$._tree;
            if ($.tree.notAllowParents(tree)) {
                var body = layer.getChildFrame('body', index);
                $("#treeId").val(body.find('#treeId').val());
                $("#treeName").val(body.find('#treeName').val());
                var questionType = $("input[name='questionType']").val();
　　　　　　　　　 #根据选择的树结构数据，进行异步查询题库单选多选数量
                if(questionType != ''){
                    $.ajax({
                        //请求方式
                        type : "POST",
                        //请求的媒体类型
                        contentType: "application/json;charset=UTF-8",
                        //请求地址
                        url : ctx + "exam/question/findQuestionSum/?questionType="+questionType,

                        //请求成功
                        success : function(result) {
　　　　　　　　　　　　　　　　 #根据后台查询单选题数量进行赋值
                            document.getElementById('singleChoiceNum').max =  result.examQuestionType.singleChoiceSum;
　　　　　　　　　　　　　　　　 #根据后台查询多选题数量进行赋值
                            document.getElementById('multipleChoiceNum').max = result.examQuestionType.multipleChoiceSum;
                        },
                        //请求失败，包含具体的错误信息
                        error : function(e){
                            console.log(e.status);
                            console.log(e.responseText);
                        }
                    });
                }
                layer.close(index);
            }
        }

　#后台代码

@PostMapping("/findQuestionSum")
    @ResponseBody
    public Map<String,Object> findQuestionSum(ExamQuestionType examQuestionType) {

        examQuestionType.setSum1("0");
        ExamQuestionType findsingleChoiceSum = examQuestionTypeService.findsingleChoiceSum(examQuestionType);
        examQuestionType.setSum1("1");
        ExamQuestionType findmultipleChoiceSum = examQuestionTypeService.findsingleChoiceSum(examQuestionType);

        examQuestionType.setSingleChoiceSum(findsingleChoiceSum.getSum1());
        examQuestionType.setMultipleChoiceSum(findmultipleChoiceSum.getSum1());
        Map<String,Object> map = new HashMap<String,Object>();
        map.put("examQuestionType",examQuestionType);


        return map;
    }