struts2启动错误
严重: Exception starting filter struts2Unable to load configuration. - [unknown location]at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58)at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:360)at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:403)at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:190)at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:295)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:4072)at org.apache.catalina.core.StandardContext.start(StandardContext.java:4726)at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1079)at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1002)at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:506)at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065)at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)at org.apache.catalina.core.StandardService.start(StandardService.java:525)at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)at org.apache.catalina.startup.Catalina.start(Catalina.java:595)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)at java.lang.reflect.Method.invoke(Unknown Source)at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)Caused by: Unable to load jar:file:/C:/Program%20Files/Apache%20Software%20Foundation/Tomcat%206.0/webapps/manage/WEB-INF/lib/struts2-jquery-plugin-2.4.1.jar!/struts-plugin.xml - [unknown location]at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:890)at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadDocuments(XmlConfigurationProvider.java:144)at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.init(XmlConfigurationProvider.java:111)at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:164)at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)... 30 moreCaused by: struts.apache.org - [unknown location]at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:115)at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:885)... 34 moreCaused by: java.net.UnknownHostException: struts.apache.orgat java.net.PlainSocketImpl.connect(Unknown Source)at java.net.SocksSocketImpl.connect(Unknown Source)at java.net.Socket.connect(Unknown Source)at java.net.Socket.connect(Unknown Source)at sun.net.NetworkClient.doConnect(Unknown Source)at sun.net.www.http.HttpClient.openServer(Unknown Source)at sun.net.www.http.HttpClient.openServer(Unknown Source)at sun.net.www.http.HttpClient.<init>(Unknown Source)at sun.net.www.http.HttpClient.New(Unknown Source)at sun.net.www.http.HttpClient.New(Unknown Source)at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(Unknown Source)at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(Unknown Source)at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(Unknown Source)at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(Unknown Source)at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(Unknown Source)at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source)at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)at javax.xml.parsers.SAXParser.parse(Unknown Source)at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:113)... 35 more
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最后发现居然是因为不能联网，应该是导致struts不能验证<!DOCTYPE struts PUBLIC
? ? "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
? ? "http://struts.apache.org/dtds/struts-2.0.dtd">这个文件，所以报错。
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另外在查找这个问题的过程中，有人说：这个dtd文件的版本也可能会导致一些莫名其妙的错误。
