原因：标签中的属性重复！
比如下面是我的错误：
下面的第三行，我粗心的为<form:form>标签写成了两个action属性，所以会提示：Attribute qualified names must be unique within an element
其中的element指的是<form:form> 而 Attribute 指的是action
<div class="tab_pane fade in active" id="showList"> <form:form action="searchForm" modelAttribute="order" action="${ctx}/sys/order/" method="post" class="breadcrumb form search"> <ul class="ul-form"> <li> <label for="orderId">订单编号</label> <form:input path="orderId" htmlEscape="false" maxlength="15" class="input-medium"/> </li> <li> <label for="goodId">商品编号</label> <form:input path="goodId" htmlEscape="false" maxlength="15" class="input-medium"/> </li> <li> <label for="shopperName">客户名称</label> <form:input path="shopperName" htmlEscape="false" maxlength="15" class="input-medium"/> </li> <%-- <li> <label for="saleTime">交易时间</label> <form:input path="saleTime" htmlEscape="false" maxlength="15" class="input-medium"/> </li> --%> </ul> <li class="btns"><input id="btnSubmit" class="btn btn-primary" type="submit" value="查询"></li> <li class="clearfix"></li> </form:form>
更正之后
<div class="tab_pane fade in active" id="showList"> <form:form id="searchForm" modelAttribute="order" action="${ctx}/sys/order/" method="post" class="breadcrumb form search"> <ul class="ul-form"> <li> <label for="orderId">订单编号</label> <form:input path="orderId" htmlEscape="false" maxlength="15" class="input-medium"/> </li> <li> <label for="goodId">商品编号</label> <form:input path="goodId" htmlEscape="false" maxlength="15" class="input-medium"/> </li> <li> <label for="shopperName">客户名称</label> <form:input path="shopperName" htmlEscape="false" maxlength="15" class="input-medium"/> </li> <%-- <li> <label for="saleTime">交易时间</label> <form:input path="saleTime" htmlEscape="false" maxlength="15" class="input-medium"/> </li> --%> </ul> <li class="btns"><input id="btnSubmit" class="btn btn-primary" type="submit" value="查询"></li> <li class="clearfix"></li> </form:form>
千万不要看见这个错误之后，误以为是自己bean的属性写重复了，如果是bean属性写重复了，并不会出现问题
证明如下
