防止表单重复提交

主要内容：

1、在login.jsp页面使用token标签。

2、在配置文件struts.xml文件内添加token拦截器到拦截器栈中。

3、在配置文件struts.xml文件内action下要有一个result（name=" invalid.token"），当重复提交后的错误访问。

范例：

login.jsp

<%@ page language = "java" contentType = "text/html; charset=UTF-8"

    pageEncoding = "UTF-8" %>

<%@ taglib uri = "/struts-tags" prefix = "s" %>

<! DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" " http://www.w3.org/TR/html4/loose.dtd" ; >

< html >

< head >

< meta http-equiv = "Content-Type" content = "text/html; charset=UTF-8" >

< title > Insert title here </ title >

</ head >

< body >

< form action = "login.action" method = "post" >

< s:token />

用户名： < input type = "text" name = "name" >< br >

手机号： < input type = "text" name = "phone" >< br >

< input type = "submit" value = "提交" >

</ form >

</ body >

</ html >

struts.xml

<? xml version = "1.0" encoding = "UTF-8" ?>

<! DOCTYPE struts PUBLIC

   "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"

   " http://struts.apache.org/dtds/struts-2.5.dtd" ; >

< struts >

      < package name = "user" namespace = "/" extends = "struts-default" >

     

          < interceptors >

            < interceptor-stack name = "myInterceptor" >

              < interceptor-ref name = "token" />

              < interceptor-ref name = "defaultStack" ></ interceptor-ref >

            </ interceptor-stack >

          </ interceptors >

          < default-interceptor-ref name = "myInterceptor" />

     

          < action name = "login" class = "com.action.LoginAction" >

             < result name = "success" > /welcome.jsp </ result >

             < result name = "invalid.token" > /500. jsp </ result >

          </ action >

      </ package >

   </ struts >