练习struts2框架所遇到的问题2

出现的第一个错误是：

严重: Exception starting filter struts2
java.lang.ClassNotFoundException: org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:269)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4001)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4651)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2013-7-9 11:49:17 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2013-7-9 11:49:17 org.apache.catalina.core.StandardContext start
严重: Context [/Prodemo1] startup failed due to previous errors

解决方法：可以看看发布后的lib目录中，是否有struts-core包，如果有，把包打开，看里面有没有这个类，如果没有删除tomcat里的wapps文件夹里的同名项目，在myeclipse里重新配置tomcat。重新启动就可以了。

第二个错误：

还是书上的同一个例子，因为在web.xml里配置的是

<filter-class>org.apache.Struts2.dispatcher.FilterDispatcher</filter-class>

web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
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_2_5.xsd">

<display-name>Struts2的配置</display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.Struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>Struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>
</web-app>

struts2.xml：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN"
"http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
<include file="struts-default.xml" />
<package name="struts2_login" extends="struts-default" namespace="/login">
<action name="checkLogin" class="com.chen.action.LoginAction" method="checkLogin">
<result name="success">/index.jsp</result>
<result name="login">/login.jsp</result>
</action>
</package>


</struts>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

<title>My JSP 'login.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

</head>

<body>
This is my JSP page. <br>

<h2>欢迎进入登录页面！</h2> <br/>
<s:textfield name="username" label="登录名称" />
<s:password name="password" label="登录密码" />
<s:submit value="登录" />
</body>
</html>

LoginAction.java:

package com.chen.action;

import com.opensymphony.xwork2.ActionSupport;

public class LoginAction extends ActionSupport{

private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}

public String checkLogin(){
if(this.username.equals("admin") && this.password.equals("abc")){
return SUCCESS;
}else{
return LOGIN;
}
}
}

所出现的错误是：

2013-7-10 9:05:08 org.apache.catalina.core.AprLifecycleListener init
信息: Loaded APR based Apache Tomcat Native library 1.1.20.
2013-7-10 9:05:08 org.apache.catalina.core.AprLifecycleListener init
信息: APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true].
2013-7-10 9:05:09 org.apache.coyote.http11.Http11AprProtocol init
信息: Initializing Coyote HTTP/1.1 on http-8080
2013-7-10 9:05:09 org.apache.coyote.ajp.AjpAprProtocol init
信息: Initializing Coyote AJP/1.3 on ajp-8009
2013-7-10 9:05:09 org.apache.catalina.startup.Catalina load
信息: Initialization processed in 1110 ms
2013-7-10 9:05:09 org.apache.catalina.core.StandardService start
信息: Starting service Catalina
2013-7-10 9:05:09 org.apache.catalina.core.StandardEngine start
信息: Starting Servlet Engine: Apache Tomcat/6.0.29
2013-7-10 9:05:09 org.apache.catalina.startup.HostConfig deployDescriptor
信息: Deploying configuration descriptor host-manager.xml
2013-7-10 9:05:09 org.apache.catalina.startup.HostConfig deployDescriptor
信息: Deploying configuration descriptor manager.xml
2013-7-10 9:05:10 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory bcims
2013-7-10 9:05:12 org.apache.catalina.core.ApplicationContext log
信息: Set web app root system property: 'webapp.root.bcims' = [D: oolsapache-tomcat-6.0.29webappscims]
2013-7-10 9:05:12 org.apache.catalina.core.ApplicationContext log
信息: Set web app root system property: 'webapp.root.bcims' = [D: oolsapache-tomcat-6.0.29webappscims]
2013-7-10 9:05:12 org.apache.catalina.core.ApplicationContext log
信息: Initializing log4j from [classpath:log4j.properties]
2013-7-10 9:05:12 org.apache.catalina.core.ApplicationContext log
信息: Initializing Spring root WebApplicationContext
2013-07-10 09:05:12,261 [main] INFO org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization started
2013-07-10 09:05:12,534 [main] INFO org.springframework.web.context.support.XmlWebApplicationContext - Refreshing Root WebApplicationContext: startup date [Wed Jul 10 09:05:12 CST 2013]; root of context hierarchy
2013-07-10 09:05:12,796 [main] INFO org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from file [D: oolsapache-tomcat-6.0.29webappscimsWEB-INFclassesapplicationContext.xml]
2013-07-10 09:05:13,042 [main] INFO org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [context-jdbc.xml]
2013-07-10 09:05:13,212 [main] INFO org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from class path resource [context-ehcache.xml]
2013-07-10 09:05:13,278 [main] INFO org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from file [D: oolsapache-tomcat-6.0.29webappscimsWEB-INFclassesconfigspringmanagers.xml]
2013-07-10 09:05:13,293 [main] INFO org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from file [D: oolsapache-tomcat-6.0.29webappscimsWEB-INFclassesconfigspring epository.xml]
2013-07-10 09:05:13,311 [main] INFO org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from file [D: oolsapache-tomcat-6.0.29webappscimsWEB-INFclassesconfigspringdaos.xml]
2013-07-10 09:05:13,335 [main] INFO org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from file [D: oolsapache-tomcat-6.0.29webappscimsWEB-INFclassesconfigspringactions.xml]
2013-07-10 09:05:15,037 [main] INFO org.springframework.beans.factory.config.PropertyPlaceholderConfigurer - Loading properties file from URL [file:/D:/tools/apache-tomcat-6.0.29/webapps/bcims/WEB-INF/classes/jdbc.properties]
2013-07-10 09:05:15,183 [main] INFO org.springframework.beans.factory.support.DefaultListableBeanFactory - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1787395: defining beans [propertyConfigurer,sqlMapClient,transactionManager,dataSource,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,org.springframework.cache.annotation.AnnotationCacheDefinitionSource#0,org.springframework.cache.interceptor.CacheInterceptor#0,org.springframework.cache.config.internalCacheAdvisor,cacheManagerFactory,cacheManager,sessionContextUtil,messageUtil,pageIteratorSolver,jsonTree,treeView,bmuserDirector,accountDirector,bmgroupDirector,bmmenuDirector,bmprourlcustomDirector,bmroleDirector,accountDao,bmUserDao,bmGroupDao,bmAttachDao,bmMenuDao,bProtectUrlAttachDao,bmProurlcustomDao,bmRoleDao,bRoleAttachDao,bAccountRoleDao,treeStructDao,entryRegistrationDao,receivedSmsInfoDao,phoneNoInfoDao,simCardInfoDao,hlrMatchDao,packagesTypeDao,shopAddDao,setMealBusinessDao,bmInformDao,rechargeDao,loginAccountUpdatePwdAction,ajaxSessionUpdateAction,accountAction,bmuserAction,bmgroupAction,bmgrouptreelistAction,bmgrouptreeviewAction,bmgrouptreeviewrecurAction,bmattachAction,bmmenuAction,bmmenutreelistAction,bmmenutreeAction,roleMenuAction,bprotecturlattachAction,bmprourlcustomAction,bmroleAction,broleattachAction,baccountroleAction,receivedsmsinfoAction,packagesTypeAction,shopAddAction,SetMealBusinessAction,bminformAction,rechargeAction]; root of factory hierarchy
2013-07-10 09:05:15,297 [main] INFO com.mchange.v2.log.MLog - MLog clients using log4j logging.
2013-07-10 09:05:15,426 [main] INFO com.mchange.v2.c3p0.C3P0Registry - Initializing c3p0-0.9.1.2 [built 21-May-2007 15:04:56; debug? true; trace: 10]
2013-07-10 09:05:16,866 [main] INFO org.springframework.cache.ehcache.EhCacheManagerFactoryBean - Initializing EHCache CacheManager
2013-07-10 09:05:16,988 [main] INFO org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 4721 ms
2013-07-10 09:05:17,387 [main] INFO com.opensymphony.xwork2.config.providers.XmlConfigurationProvider - Parsing configuration file [struts-default.xml]
2013-07-10 09:05:17,714 [main] INFO com.opensymphony.xwork2.config.providers.XmlConfigurationProvider - Parsing configuration file [struts-plugin.xml]
2013-07-10 09:05:17,783 [main] INFO com.opensymphony.xwork2.config.providers.XmlConfigurationProvider - Parsing configuration file [struts.xml]
2013-07-10 09:05:17,799 [main] INFO org.apache.struts2.config.BeanSelectionProvider - Loading global messages from config/i18n/globalMessages
2013-07-10 09:05:18,028 [main] INFO org.apache.struts2.spring.StrutsSpringObjectFactory - Initializing Struts-Spring integration...
2013-07-10 09:05:18,028 [main] INFO com.opensymphony.xwork2.spring.SpringObjectFactory - Setting autowire strategy to name
2013-07-10 09:05:18,028 [main] INFO org.apache.struts2.spring.StrutsSpringObjectFactory - ... initialized Struts-Spring integration successfully
2013-7-10 9:05:18 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory docs
2013-7-10 9:05:19 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory examples
2013-7-10 9:05:19 org.apache.catalina.core.ApplicationContext log
信息: ContextListener: contextInitialized()
2013-7-10 9:05:19 org.apache.catalina.core.ApplicationContext log
信息: SessionListener: contextInitialized()
2013-7-10 9:05:19 org.apache.catalina.startup.HostConfig deployDirectory
信息: Deploying web application directory Prodemo2
2013-7-10 9:05:19 org.apache.tomcat.util.digester.Digester endElement
严重:End event threw exception

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.tomcat.util.IntrospectionUtils.callMethod1(IntrospectionUtils.java:928)
at org.apache.tomcat.util.digester.SetNextRule.end(SetNextRule.java:193)
at org.apache.tomcat.util.digester.Rule.end(Rule.java:229)
at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:1138)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:601)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1774)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2930)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1642)
at org.apache.catalina.startup.ContextConfig.applicationWebConfig(ContextConfig.java:365)
at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1076)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4540)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: java.lang.IllegalArgumentException: Filter mapping specifies an unknown filter name Struts2
at org.apache.catalina.core.StandardContext.addFilterMap(StandardContext.java:2438)
... 46 more
2013-7-10 9:05:19 org.apache.catalina.startup.ContextConfig applicationWebConfig
严重: Parse error in application web.xml file at jndi:/localhost/Prodemo2/WEB-INF/web.xml
java.lang.IllegalArgumentException: Filter mapping specifies an unknown filter name Struts2
at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2806)
at org.apache.tomcat.util.digester.Digester.createSAXException(Digester.java:2832)
at org.apache.tomcat.util.digester.Digester.endElement(Digester.java:1141)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:601)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1774)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2930)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
at org.apache.tomcat.util.digester.Digester.parse(Digester.java:1642)
at org.apache.catalina.startup.ContextConfig.applicationWebConfig(ContextConfig.java:365)
at org.apache.catalina.startup.ContextConfig.start(ContextConfig.java:1076)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:261)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4540)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2013-7-10 9:05:19 org.apache.catalina.startup.ContextConfig applicationWebConfig
严重: Occurred at line 16 column 19
2013-7-10 9:05:19 org.apache.catalina.startup.ContextConfig start
严重: Marking this application unavailable due to previous error(s)
2013-7-10 9:05:20 org.apache.catalina.core.StandardContext start
严重: Error getConfigured
2013-7-10 9:05:20 org.apache.catalina.core.StandardContext start
严重: Context [/Prodemo2] startup failed due to previous errors

解决方法：把web.xml里的<filter-name>Struts2</filter-name>Struts2改成struts2就好了

第三个错误：

严重: Exception starting filter struts2
java.lang.ClassNotFoundException: org.apache.Struts2.dispatcher.FilterDispatcher
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1645)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1491)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:269)
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:422)
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:115)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4001)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4651)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1041)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:964)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
2013-7-10 14:46:38 org.apache.catalina.core.StandardContext start
严重: Error filterStart
2013-7-10 14:46:38 org.apache.catalina.core.StandardContext start
严重: Context [/Prodemo2] startup failed due to previous errors

解决方法：把web.xml中的

<filter-class>org.apache.Struts2.dispatcher.FilterDispatcher</filter-class>改成

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

因为在程序中找不到FilterDispatcher类，

注:struts2.0用的filter用的是：org.apache.struts2.dispatcher.FilterDispatcher,

而struts2.1以后版本采用的是：org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter

第四个错误：

2013-7-10 15:04:26 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: No configuration found for the specified action: 'checkLogin' in namespace: '/login'. Form action defaulting to 'action' attribute's literal value.
2013-7-10 15:04:27 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: No configuration found for the specified action: 'checkLogin' in namespace: '/login'. Form action defaulting to 'action' attribute's literal value.
2013-7-10 15:04:27 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: No configuration found for the specified action: 'checkLogin' in namespace: '/login'. Form action defaulting to 'action' attribute's literal value.
2013-7-10 15:04:27 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: No configuration found for the specified action: 'checkLogin' in namespace: '/login'. Form action defaulting to 'action' attribute's literal value.
2013-7-10 15:04:31 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: No configuration found for the specified action: 'checkLogin' in namespace: '/login'. Form action defaulting to 'action' attribute's literal value.
2013-7-10 15:04:31 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: No configuration found for the specified action: 'checkLogin' in namespace: '/login'. Form action defaulting to 'action' attribute's literal value.
2013-7-10 15:04:38 com.opensymphony.xwork2.util.logging.commons.CommonsLogger warn
警告: Could not find action or result
There is no Action mapped for namespace / and action name checkLogin. - [unknown location]
at com.opensymphony.xwork2.DefaultActionProxy.prepare(DefaultActionProxy.java:177)
at org.apache.struts2.impl.StrutsActionProxy.prepare(StrutsActionProxy.java:61)
at org.apache.struts2.impl.StrutsActionProxyFactory.createActionProxy(StrutsActionProxyFactory.java:39)
at com.opensymphony.xwork2.DefaultActionProxyFactory.createActionProxy(DefaultActionProxyFactory.java:47)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:458)
at org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:861)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1584)
at java.lang.Thread.run(Thread.java:619)

解决方法：