struts分发action下用Token解决重复提交问题

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一、写跳转用的发帖链接页面，点击后，对应的action中会对该次提交加上一个Token令牌

<%@ page language="java" pageEncoding="utf-8"%><%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %><%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %><%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %><%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %><html:html lang="true">  <head>    <html:base />    <title>forum.jsp</title>  </head>  <body>  <html:link action="/publish.do?status=forTopic">我要发帖</html:link>  </body></html:html>

二、Action中的forTopic方法给该提交加令牌Token

package com.test.struts.action;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionForward;import org.apache.struts.action.ActionMapping;import org.apache.struts.actions.DispatchAction;import com.test.struts.form.PublishForm;public class PublishAction extends DispatchAction {//这个方法给publishTopic-1.jsp的链接加上令牌public ActionForward forTopic(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) {PublishForm publishForm = (PublishForm) form;// TODO Auto-generated method stubSystem.out.println("forTopic...");this.saveToken(request);return mapping.findForward("publishTopic");}//用于检查令牌是否过时，并做出相应处理public ActionForward toTopic(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) {PublishForm publishForm = (PublishForm) form;// TODO Auto-generated method stubif(isTokenValid(request)){ //如果两个Token相匹配的话System.out.println("toTopic...");String title = request.getParameter("title");String content = request.getParameter("content");request.setAttribute("title", title);request.setAttribute("content", content);this.resetToken(request);return mapping.findForward("publishshow");}else{System.out.println("for resubmit error...");return mapping.findForward("error");}}}

三、发帖内容填写页面publishTopic.jsp

<%@ page language="java" pageEncoding="utf-8"%><%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %><%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %><%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %><%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html:html lang="true">  <head>    <html:base />        <title>publishTopic.jsp</title>  </head>    <body>     <html:form action="/publish.do?status=toTopic" method="post">    <input type="text" name="title"/><br>    <input type="text" name="content"/><br>    <input type="submit" value="发表"/>    <input type="reset" value="重置"/>    </html:form>     <h1>good!!</h1>  </body></html:html>

四、提交后成功时显示的页面publishshow.jsp

<%@ page language="java" pageEncoding="utf-8"%><%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %><%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %><%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %><%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html:html lang="true">  <head>    <html:base />        <title>publishshow.jsp</title>  </head>    <body>  <h1>发表后的文章信息：</h1>  <input type="text" value="<%=request.getAttribute("title") %>"/><br>  <input type="text" value="<%=request.getAttribute("content") %>"/>  </body></html:html>

五、后退浏览器重复提交后显示的页面error.jsp

<%@ page language="java" pageEncoding="utf-8"%><%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean" %><%@ taglib uri="http://struts.apache.org/tags-html" prefix="html" %><%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %><%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html:html lang="true">  <head>    <html:base />    <title>error.jsp</title>  </head>  <body>    <h1>重复提交了！！！</h1>  </body></html:html>

六、struts-config.xml中对应的配置

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd"><struts-config>  <data-sources />  <form-beans >    <form-bean name="publishForm" type="com.test.struts.form.PublishForm" />    <form-bean name="tokenActionForm" type="com.test.struts.form.TokenActionForm" />    </form-beans>  <global-exceptions />  <global-forwards />  <action-mappings >    <action      attribute="publishForm"      input="/error.jsp"      name="publishForm"      parameter="status"      path="/publish"      scope="request"      type="com.test.struts.action.PublishAction">      <forward name="publishTopic" path="/publishTopic.jsp"></forward>      <forward name="error" path="/error.jsp"></forward>      <forward name="publishshow" path="/publishshow.jsp"></forward>    </action>    <action    attribute="tokenActionForm"    parameter="status"    input="/error.jsp"     path="/tokenAction"      scope="request"     name="tokenActionForm"     type="com.test.struts.action.TokenActionAction">     <forward name="strutsToken1" path="/strutsToken1.jsp"></forward>    </action>  </action-mappings>  <message-resources parameter="com.test.struts.ApplicationResources" /></struts-config>

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