velocity下拉框选中状态

velocity下拉框，点击搜索按钮后，下拉框被选中依然是帅选条件的值
/**supplierCode该名称必须得在action中存在get,set方法，否则下拉框的值不会被选中*/

<select name="supplierCode" id="supplierCode">
	                <option value=""></option>
		            <#foreach vo in platformNameList>
	                    <#if "${vo.supplier_code}" == "${supplierCode?if_exists}">
						   <option selected="selected" value="${vo.supplier_code?if_exists}">${vo.supplier_name?if_exists?html}</option>
					    <#else>
		                  <option value="${vo.supplier_code?if_exists}">${vo.supplier_name?if_exists?html}</option>
					    </#if> 
		            </#foreach>
		        </select>