struts1里struts-config.xml文件配置出错了

<?xml version="1.0" encoding="ISO-8859-1" ?>

<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
"http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">

<form-beans  name="calForm" type="com.yupei.struts.web.CalculateActionForm"/>

<action-mappings>
    <action path="/calculate" 
            type="com.yupei.struts.web.CalculateAction"
            name="calForm">
        <forward name="/index" path="index.jsp"></forward>
        <forward name="/ret" path="ret.jsp"></forward>
    </action>
</action-mappings>
<message-resources parameter="MessageResources" />

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为什么name属性会出错呢

http://blog.csdn.net/u014464597/article/details/41013659