1）最少需要导入的jar包：

commons-fileupload-1.2.1.jar、commons-logging-1.0.4.jar、

freemarker-2.3.15.jar、ognl-2.7.3.jar、struts2-core-2.1.8.jar、

xwork-core-2.1.6.jar

2）web.xml文件的配置：

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter
.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>

	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>

</web-app>

3）struts.xml文件的配置：

<?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>

</struts>

运行程序，若控制台无错误提示，则struts2环境搭建成功。