Wait拦截器（execAndWait）友好提示
前台表单提交登录请求（login.jsp, login.action,wait.jsp）
login.jsp
<form action="login.action" method="post"> username:<input type="text" name="username"><br> password:<input type="password" name="password"><br> <input type="submit" value="submit"> </form>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();//当前页面当时刷新3秒response.setHeader("refresh","3;URL=login.action");String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>"> <title>My JSP 'login.jsp' starting page</title> <!-- 定时刷新3秒，当前页面 --><meta http-equiv="refresh" content="3;URL=login.action"> </head> <body> <h1>数据已经提交，正在等待服务器返回信息，请耐心等待。。。。。。</h1> </body> </html><action name="login" exception="com.test.exception.UsernameException"></exception-mapping><result name="success">/result.jsp</result><result name="usernameInvalid">/usernameInvalid.jsp</result><!-- 这里的name一定要为wait --><result name="wait">/wait.jsp</result><interceptor-ref name="defaultStack"></interceptor-ref><!-- exec拦截器必须在所有拦截器的最后 --><interceptor-ref name="execAndWait"></interceptor-ref></action>