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.apache.org/dtds/struts-2.0.dtd"> <struts> <!-- 默认的视图主题 --> <constant name="struts.ui.theme" value="simple" /> <!-- struts2在防止表单重复提交的拦截中有2个，分别是：token，tokenSession。tokenSession继承token而来。 通常情况下，使用tokenSession客户端感觉会比较友好。 --> <!-- 如果重复提交，会跳转到error.jsp页面 --> <package name="person" namespace="/test" extends="struts-default"> <action name="token" class="com.ljq.action.PersonAction"> <interceptor-ref name="defaultStack" /> <interceptor-ref name="token" /> <!-- 如果重复提交，跳转到error.jsp页面 --> <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" /> <!-- 如果重复提交，不会跳转到error.jsp页面 --> <result name="invalid.token">/WEB-INF/page/error.jsp</result> <result>/WEB-INF/page/message.jsp</result> </action> </package> </struts>
PersonAction类
package com.ljq.action; import java.util.ArrayList; import java.util.List; public class PersonAction { private String name; @SuppressWarnings("unchecked") //观看控制台 //如果token生效则不会在控制台输出name的值，而会输出如下警告： 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表单页面
<%@ 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>防止表单重复提交</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> </head> <body> <!-- 防止表单重复提交，记得在form表单里填上<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="发送"/> </s:form> </body> </html>
message.jsp返回成功页面
<%@ 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表单重复提交提示页面
<%@ 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> 您已经提交了表单，请不要重复提交。 </body> </html>