struts2 一個form，多個submit 問題

sendUI.jsp

      <s:form action="sendOrSaveToDraftBox" method="post" namespace="/MessageAction" name="send">
   <s:select label="層級" name="priority" list="#{0:'普通',1:'重要'}"  headerKey="-1" headerValue="請選擇層級"/>
   <s:select label="收件者" name="receiverId" list="receiversList" multiple="true" listKey="id" listValue="name"/>
   <s:textfield label="標題" name="title" />
   <s:textarea label="訊息內容" name="content" cols="50" rows="10" ></s:textarea>
   <s:submit value="發送"  method="send"></s:submit>
   <s:submit value="儲存草稿"  method="saveToDraftBox"></s:submit>
   <s:reset></s:reset>
   </s:form>

struts.xml

      <constant name="struts.enable.DynamicMethodInvocation" value="true" />重要

        <action name="sendOrSaveToDraftBox" class="cn.itcast.oa.web.action.MessageAction" >
     <result type="redirectAction" name="toOutBox">outBox</result>
     <result type="redirectAction" name="toDraftBox">draftBox</result>
     </action>

MessageAction

/**發送訊息*/
public String send() throws Exception {

//......

    
return "toOutBox";

}

/**儲存草稿*/

  public String saveToDraftBox() throws Exception {

//......
return "toDraftBox";
}