Struts2利用token和tokenSession拦截器防止重复提交

1 <@ taglib prefix="s" uri="/struts-tags" /> 
2  
3 <s:form action="testToken" namespace="/" method="post">
4     <s:token></s:token><!--表单中插入token标签-->
5     <s:textfield name="userName" label="Username"/>
6     <s:submit></s:submit>
7 </s:form>

<action ="testToken" class="com.test.UserAction">
        <interceptor-ref name="defaultStack"></interceptor-ref>
           <interceptor-ref name="token"></interceptor-ref>
        <result>/success.jsp</result>
        <result name="invalid.token">/error.jsp?message=重复提交         </result><!--配置name为invalid.token的result 重复提交时跳转到此页面--->
</action>    

 1 public class UserAction extends ActionSupport{//一定要继承ActionSupport
 2            private String userName;
 3            public void execute(){
 4                 return "success";
 5             }
 6            public void setUserName(String userName) {
 7         　　　　 this.userName = userName;
 8       　　  }
 9      　　  public String getUserName() {
10        　　　　 return userName;
11        　　 }
12 }