validator不验证
不知道为什么，我怎么也找不到不验证的原来。请各位大虾帮帮忙看看。
struts-config.xml中的代码是：

<?xml   version= "1.0 "   encoding= "UTF-8 "?>
<!DOCTYPE   struts-config   PUBLIC   "-//Apache   Software   Foundation//DTD   Struts   Configuration   1.2//EN "   "http://struts.apache.org/dtds/struts-config_1_2.dtd ">

<struts-config>
    <data-sources   />
    <form-beans   >
        <form-bean   name= "loginForm "   type= "com.yourcompany.struts.form.LoginForm "   />

    </form-beans>

    <global-exceptions   />
    <global-forwards   />
    <action-mappings   >
        <action
            attribute= "loginForm "
            input= "/login.jsp "
            name= "loginForm "
            path= "/login "
            scope= "request "
            validate= "true "
            type= "com.yourcompany.struts.action.LoginAction ">
<forward   name= "success "   path= "/index.jsp "   />
  </action>
    </action-mappings>

    <message-resources   parameter= "com.yourcompany.struts.ApplicationResources "   />
<plug-in   className= "org.apache.struts.validator.ValidatorPlugIn ">
    <set-property   property= "pathnames "
        value= "/WEB-INF/validator-rules.xml,
        /WEB-INF/validation.xml "/>
    </plug-in>
</struts-config>


validation.xml中的代码是：

<?xml   version= "1.0 "   encoding= "UTF-8 "?>
<!DOCTYPE   form-validation   PUBLIC
                    "-//Apache   Software   Foundation//DTD   Commons   Validator   Rules   Configuration   1.1.3//EN "
                    "http://jakarta.apache.org/commons/dtds/validator_1_1_3.dtd ">
<form-validation>
<formset>
<form   name= "loginForm ">
            <field   property= "userName "   depends= "required ">
                <arg   key= "registrationForm.userName.displayname "   position= "0 "/>
            </field>
        </form>
</formset>
</form-validation>


jsp中的代码是：
<%@   page   contentType= "text/html;charset=UTF-8 "   %>
<%@   taglib   uri= "/tags/struts-bean "   prefix= "bean "   %>
<%@   taglib   uri= "/tags/struts-html "   prefix= "ht