利用Token解决重复提交问题

最新推荐文章于 2024-11-15 15:35:39 发布

jhlisprimer

最新推荐文章于 2024-11-15 15:35:39 发布

阅读量170

点赞数

CC 4.0 BY-SA版权

分类专栏： Struts1.x 文章标签： Struts Apache HTML JSP Bean

本文链接：https://blog.youkuaiyun.com/jhlisprimer/article/details/83694359

Struts1.x 专栏收录该内容

9 篇文章

订阅专栏

1、定义一个InsertForm类

package com.sunrex.demo01.form;

import org.apache.struts.action.ActionForm;

@SuppressWarnings("serial")
public class InsertForm extends ActionForm {
	private String username;
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
}

2、定义InsertAction类

package com.sunrex.demo01.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;

public class InsertAction extends DispatchAction {

	@Override
	protected ActionForward unspecified(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		//根据时间戳，保存session的Globals.TRANSACTION_TOKEN_KEY中
		//还可以更新session的Globals.TRANSACTION_TOKEN_KEY
		saveToken(request);
		
		return mapping.findForward("init");
	}
	
	public ActionForward insert(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
	throws Exception {
		//isTokenValid是将页面中出来的参数，与session中的
		//Globals.TRANSACTION_TOKEN_KEY的值比较， 如果相等，表示不是重复提交。
		if(isTokenValid(request)) {
			System.out.println("---不是重复提交---");
			resetToken(request);//第一次提交时，isTokeValid(request)为true
		} else {
			System.out.println("--重复提交---");
			saveToken(request);
			
		}
		return mapping.findForward("insert");
	}
}

3、配置Struts-config.xml文件

<?xml version="1.0" encoding="ISO-8859-1" ?>

<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
          "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">

<struts-config>
	<form-beans>
		<form-bean name="insertForm" type="com.sunrex.demo01.form.InsertForm"/>
	</form-beans>
	<action-mappings>
		<action path="/insert"
			type="com.sunrex.demo01.action.InsertAction"
			scope="request"
			name="insertForm"
			parameter="method"
		>
			<forward name="init" path="/WEB-INF/demo01/index.jsp"></forward>
			<forward name="insert" path="/WEB-INF/demo01/insert.jsp"></forward>
		</action>
	</action-mappings>
	
</struts-config>

4、定义index.jsp页面

<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB18030"%>
<%@ taglib prefix="html" uri="http://struts.apache.org/tags-html" %>    
<%@ taglib prefix="bean" uri="http://struts.apache.org/tags-bean" %>    
<!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=GB18030">
<title>Insert title here</title>
</head>
<body>
	<html:form action="/insert.do?method=insert">
		<html:text property="username"></html:text>
		<html:submit value="提交"></html:submit>
	</html:form>
</body>
</html>

运行时：首先访问到index.jsp页面，其生成的源码如下：

<!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=GB18030">
<title>Insert title here</title>
</head>
<body>
	<form name="insertForm" method="post" action="/Struts1_002/insert.do?method=insert"><div><input type="hidden" name="org.apache.struts.taglib.html.TOKEN" value="b466e3fe1bb04a3a05b7de6cff56b522"></div>
		<input type="text" name="username" value="">
		<input type="submit" value="提交">
	</form>
</body>
</html>