<div class="panel-group" id="accordion04">
<div class="panel panel-info">
<div class="panel-heading">
<div class="panel-title">
<a data-toggle="collapse" data-parent="#accordion"
href="#valueFilterCollapse"> + 测试</a>
</div>
</div>
<div id="valueFilterCollapse" class="panel-collapse collapse">
<div class="panel-body">
<div class="form-group col-md-3">
<form:select path="userName" class="form-control">
<form:option value="">
<spring:message code="ui.option-select" /> <!--請選擇-->
</form:option>
<form:option value=""> 测试1
</form:option>
<form:option value=""> 测试2
</form:option>
</form:select>
</div>
<div class="form-group col-md-3">
<form:select path="userName" class="form-control">
<form:option value="">
<spring:message code="ui.option-select" /> <!--請選擇-->
</form:option>
<form:option value=""> > </form:option>
<form:option value=""> >= </form:option>
<form:option value=""> = </form:option>
<form:option value=""> != </form:option>
<form:option value=""> < </form:option>
<form:option value=""> <= </form:option>
<form:option value=""> like </form:option>
</form:select>
</div>
<div class="form-group col-md-3">
<form:input path="account" class="form-control" maxlength="20" />
</div>
<!-- 加减 -->
<div class="form-group col-md-1">
<a href="#"><i class="fa fa-plus"></i></a>
   
<a href="#"><i class="fa fa-minus"></i></a>
</div>
<div class="form-group col-md-1">
</div>
</div>
</div>
</div>
</div>
给题主提供一个思路：
1.将需要重复添加的dom在初始化页面时，用一个变量进行存储；
2.当需要增加时，找到添加元素的父级元素，将保存dom变量进行插入；