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struts.xml配置文件
 <?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts./dtds/struts-2.0.dtd">
<struts>
<!-- 默認(rèn)的視圖主題 -->
<constant name="struts.ui.theme" value="simple" />
<!-- struts2在防止表單重復(fù)提交的攔截中有2個(gè)，分別是：token，tokenSession。tokenSession繼承token而來(lái)。
通常情況下，使用tokenSession客戶端感覺(jué)會(huì)比較友好。 -->
<!-- 如果重復(fù)提交，會(huì)跳轉(zhuǎn)到error.jsp頁(yè)面 -->
<package name="person" namespace="/test" extends="struts-default">
<action name="token" class="com.ljq.action.PersonAction">
<interceptor-ref name="defaultStack" />
<interceptor-ref name="token" />
<!-- 如果重復(fù)提交，跳轉(zhuǎn)到error.jsp頁(yè)面 -->
<result name="invalid.token">/WEB-INF/page/error.jsp</result>
<result>/WEB-INF/page/message.jsp</result>
</action>
<action name="tokenSession" class="com.ljq.action.PersonAction">
<interceptor-ref name="defaultStack" />
<interceptor-ref name="tokenSession" />
<!-- 如果重復(fù)提交，不會(huì)跳轉(zhuǎn)到error.jsp頁(yè)面 -->
<result name="invalid.token">/WEB-INF/page/error.jsp</result>
<result>/WEB-INF/page/message.jsp</result>
</action>
</package>
</struts>
PersonAction類
package com.ljq.action;
import java.util.ArrayList;
import java.util.List;
public class PersonAction {
private String name;
@SuppressWarnings("unchecked")
//觀看控制臺(tái)
//如果token生效則不會(huì)在控制臺(tái)輸出name的值，而會(huì)輸出如下警告： 2011-3-14 20:45:32 com.opensymphony.xwork2.util.logging.commons.CommonsLogger
//warn 警告: Form token EDZ4S96RNDN5VD8B1CQTK6FTHIJUPC66 does not match the session token null.
public String execute() {
List ls = new ArrayList();
ls.add(name);
for (int i = 0; i < ls.size(); i++) {
System.out.println(ls.get(i));
}
return "success";
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
index.jsp表單頁(yè)面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>防止表單重復(fù)提交</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
</head>
<body>
<!-- 防止表單重復(fù)提交，記得在form表單里填上<s:token></s:token> -->
<!-- action="token"、action="tokenSession" -->
<s:form action="token" namespace="/test" method="post">
姓名:<s:textfield name="name"/><s:token></s:token>
<input type="submit" value="發(fā)送"/>
</s:form>
</body>
</html>
message.jsp返回成功頁(yè)面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
</head>
<body>
<s:property value="name"/><br/>
<%=new Date() %>
</body>
</html>
error.jsp表單重復(fù)提交提示頁(yè)面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<%
String path = request.getContextPath();
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 'error.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
您已經(jīng)提交了表單，請(qǐng)不要重復(fù)提交。
</body>
</html>
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