新人问一下这个struts2的配置缺了什么

 <?xml version="1.0" encoding="UTF-8"?>
   <!DOCTYPE struts PUBLIC 
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <package name="struts2login" extends="struts-default"/>
    <constant name="struts.devMode" value="true"/>
        <action name="login" class="controller.Login">
            <result name="toOKJSP">/ok.jsp</result>
            <result name="toNOJSP">/no.jsp</result>
        </action>
</struts>

想做一个简单的登录，但一直提示strut2报错

 <?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
    <package name="ssh" extends="struts-default" namespace="/">
        <action name="userAction" class="UserAction">
            <result name="success">/index.jsp</result>
        </action>
    </package>
</struts>

报错信息呢？

 "controller.Login"

这个路径前面没有com.XXX什么的吗？

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.5.dtd">



/index.jsp

struts 换个高版本的 2.0不行

    <!DOCTYPE struts PUBLIC 
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.5.dtd">