关于struts 提交form后无法调用action解决办法

<html:form action="/userAction/showUserList.do">      <html:submit>显示所有用户</html:submit>      </html:form>   <html:form action="/userAction/showUserList.do">    <html:submit>显示所有用户</html:submit>    </html:form>

<action path="/userAction/showUserList"          type="usermodule.UserAction"          name="userForm"          parameter="showUserList"          scope="request"          input="/root/user/userlist.jsp">           <forward name="success" path="/root/user/userlist.jsp"></forward>   </action>  

<table>           <tr>             <td>登陆名 </td>             <td>真实姓名 </td>             <td>EMAIL</td>           </tr>              <logic:present name="userList">              <logic:iterate id="UserForm" name="userList" type="usermodule.DBUser">                <tr>                  <td>                    <bean:write name="UserForm" property="username"/>                  </td>                  <td>                    <bean:write name="UserForm" property="realname"/>                  </td>                  <td>                    <bean:write name="UserForm" property="email"/>                  </td>                </tr>              </logic:iterate>              </logic:present>              <tr><td>              <html:form action="/userAction/showUserList.do">                <html:submit>显示所有用户</html:submit>              </html:form>              </td></tr>       </table>  <table>        <tr>          <td>登陆名 </td>          <td>真实姓名 </td>          <td>EMAIL</td>        </tr>           <logic:present name="userList">           <logic:iterate id="UserForm" name="userList" type="usermodule.DBUser">             <tr>               <td>                 <bean:write name="UserForm" property="username"/>               </td>               <td>                 <bean:write name="UserForm" property="realname"/>               </td>               <td>                 <bean:write name="UserForm" property="email"/>               </td>             </tr>           </logic:iterate>           </logic:present>           <tr><td>           <html:form action="/userAction/showUserList.do">             <html:submit>显示所有用户</html:submit>           </html:form>           </td></tr>    </table>