Struts-配置struts2时启动总是报java.lang.ClassNotFoundException:StrutsPrepareAndExecuteFilter

Question

我的struts2的配置为（struts是2.2.3的）

jar包：

struts.xml配置为
<?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>
<!--
<constant name="struts.action.extension" value="do" />
<constant name="struts.devMode" value="false" />
<constant name="struts.enable.DynamicMethodInvocation" value="false" />

<include file="mailreader-default.xml"/>

<include file="mailreader-support.xml"/>
-->
<include file="struts-default.xml"/>
<package name="struts2" extends="struts-default">
<action name="login" class="com.test.action.LoginAction">
<result name="success">/result.jsp</result>
</action>
</package>

</struts>

web.xml的配置为
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0"
metadata-complete="true">

<display-name>Struts 2 Mailreader</display-name>

<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
<init-param>
<param-name>actionPackages</param-name>
<param-value>com.test.action</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

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

</web-app>

但是每次启动都报错：
java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
有谁知道是什么原因吗？

Answer 1

这个类在struts2-core-2.2.3.jar中，你的jar文件是在WEB-INF/lib麽?
WEB-INF/lib是要有这个jar的。