详解struts2的token机制和cookie来防止表单重复提交

 
<s:token></s:token> 

  <action name="token" class="com.xiaoluo.struts2.TokenAction"> 
    <result name="success">/tokenSuccess.jsp</result> 
    <result name="invalid.token">/tokenFail.jsp</result> //name必须是invalid.token 
         
    <interceptor-ref name="token"></interceptor-ref> 
    <interceptor-ref name="defaultStack"></interceptor-ref> 
  </action> 

 Cookie[] cookies = request.getCookies(); 
         
    for(Cookie cookie : cookies) 
    { 
      if(String.valueOf(vote.getId()).equals(cookie.getValue())) 
      { 
        response.sendRedirect("repeatSubmit.jsp"); 
      } 
      else 
      { 
        Cookie cookie2 = new Cookie("hasVote" + vote.getId(), String.valueOf(vote.getId())); 
             
        response.addCookie(cookie2); 
      } 
    }