org.apache.jasper.JasperException: /WEB-INF/views/modules/goodMan/orderList.jsp (line: [30], column: [82]) Attribute qualified names must be unique within an element

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