表单重复提交处理总结

一、重复提交的处理方式

1.在进行请求之后重定向到查询或者其他不操作数据库的请求
2.将页面事件执行的按钮置灰，防止重复点击触发请求
3.自定义设置token，在请求之前将随机的token值放入session中，执行请求时候讲session中的token值删除，重复提交时候因为session中的token值不存在，判断该请求已经提交过不处理
4.数据库层加锁，对该记录的操作锁表，其余对该记录操作的请求要等待

二、struts2的token配置与项目实例

Struts标签库里面有<s:token/>标签，在页面隐藏域中添加随机值得token参数，提交表单后一起作为参数传递到后台放入session，struts配置token后不允许相同tbken的表单提交。
期待结果：
请求http://localhost:8080/token/index.action



点击按钮：



刷新页面：



Struts2的token设置记录（maven、jetty）：



pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion>
<groupId>cn.dx</groupId>
<artifactId>struts2token</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>struts2token Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>

<!-- junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>

<!-- struts2 -->
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
<version>2.3.24.1</version>
</dependency>
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-json-plugin</artifactId>
<version>2.3.24.1</version>
</dependency>

<!-- jsp-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>

</dependencies>
<build>
<finalName>struts2token</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>utf8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>8.0.0.M3</version>
</plugin>

</plugins>

</build>
</project>

struts.xml配置:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>

<package name="dx-default" extends="json-default" namespace="/">

<interceptors>
<interceptor name="loginInterceptor" class="cn.dx.interceptor.LoginInterceptor"/>
<interceptor-stack name="dxStack">
<interceptor-ref name="loginInterceptor" />
<!-- <interceptor-ref name="SysVisitStatusInterceprot" /> -->
<interceptor-ref name="defaultStack"></interceptor-ref>
</interceptor-stack>
</interceptors>

<default-interceptor-ref name="dxStack"/>

</package>

<include file="struts/dx-stoken.xml" />

</struts>

dx-token.xml配置：

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

<package name="dx-token" extends="dx-default" namespace="/token">
<action name="index" class="cn.dx.action.TokenAction" method="index">
<result name="index">index.jsp</result>
</action>
<action name="addTest" class="cn.dx.action.TokenAction" method="addTest">
<result name="success">success.jsp</result>
<result name="invalid.token">error.jsp</result>
<interceptor-ref name="defaultStack"/>
<interceptor-ref name="token"/>
</action>
</package>

</struts>

web.xml配置：

<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
<display-name>struts2token</display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
<init-param>
<param-name>config</param-name>
<param-value>struts-default.xml,struts-plugin.xml,struts/struts.xml</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

拦截器LoginInterceptor：

package cn.dx.interceptor;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
import org.apache.struts2.ServletActionContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
* Created by liuxiongwei on 2015/12/22.
*/
public class LoginInterceptor extends AbstractInterceptor{

@Override
public String intercept(ActionInvocation actionInvocation) throws Exception {
HttpServletRequest request=ServletActionContext.getRequest();
HttpServletResponse response= ServletActionContext.getResponse();
HttpSession session=request.getSession();
String reqURI = request.getRequestURI();
System.out.println("reqURI = " + reqURI);
/* if(reqURI.endsWith("index.action")){
return actionInvocation.invoke();
}else{
if(session.getAttribute("currentUser")!=null){
return  actionInvocation.invoke();
}else{
response.sendRedirect(request.getContextPath()+"/login.jsp");
}
}*/
actionInvocation.invoke();
return null;
}
}

action：TokenAction

package cn.dx.action;

import com.opensymphony.xwork2.ActionSupport;

/**
* Created by liuxiongwei on 2015/12/22.
*/
public class TokenAction extends ActionSupport{
public String name;
public String address;

public String index() {
System.out.println("进入首页成功！");
return "index";
}

public String addTest(){
System.out.println("token");
System.out.println("name: "+name);
System.out.println("address: "+address);
return SUCCESS;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getAddress() {
return address;
}

public void setAddress(String address) {
this.address = address;
}
}

index.jsp

<%--
Created by IntelliJ IDEA.
User: liuxiongwei
Date: 2015/12/22
Time: 21:49
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="s" uri="/struts-tags" %>

<html>
<head>
<title>token测试</title>
</head>
<body>

<s:form action="addTest" method="get">
<s:token/>
<s:submit type="button">测试token</s:submit>
</s:form>

</body>
</html>

success.jsp

<%--
Created by IntelliJ IDEA.
User: liuxiongwei
Date: 2015/12/22
Time: 22.58
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>token第一次提交结果</title>
</head>
<body>
<h1>token第一次提交结果!</h1>
</body>
</html>

error.jsp

<%--
Created by IntelliJ IDEA.
User: liuxiongwei
Date: 2015/12/22
Time: 23:01
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>token重复提交</title>
</head>
<body>
<h1 style="color: red">token重复提交！</h1>
</body>
</html>