用struts的validator怎么验证密码长度?

Question

请问用struts的validator怎么验证密码长度?
还有我能不能把提示的内容不写在资源文件中,而是直接写在xml中,我用resource="false"好象还是不行....
               <field property="password" depends="required,maxlength">
                   <arg0 key="password.require" name="requied" resource="false"/>
                   <arg1 key="密码不能超过12位" name="maxlength" resource="false"/>
                   <var>
                      <var-name>maxlength</var-name>
                      <var-value>12</var-value>
                   </var>
               </field>