jeesite #form中获取控件的值，以绑定的treeselect为例

<div class="form-group">
                    <#form:form id="searchForm" model="${iotDevice}" action="${ctx}/iot/iotItem/listGroupData" method="post" class="form-inline "
                    data-page-no="${parameter.pageNo}" data-page-size="${parameter.pageSize}" data-order-by="${parameter.orderBy}">
                    <div class="form-group">
                        <label class="control-label" title="">${text('设备分组')}：</label>
                        <div class="control-inline">
                            <#form:treeselect id="parent" title="${text('设备分组')}"
                            path="groupCode" labelPath="groupName"
                            url="${ctx}/iot/iotGroup/treeData"
                            allowClear="true" canSelectRoot="false" canSelectParent="false" />
                        </div>
                    </div>
                    <div class="form-group">
                        <button type="button" onclick="$('#dataGridItem').dataGrid('reloadGrid');initConfigGroup();" class="btn btn-primary btn-sm">查询</button>
                    </div>
                    </div>

 console.log($("#parentName")[0].value);