struts.apache.org

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　　造成错误的原因：struts-config.xml文件中引入的dtd文件和Struts包的版本不匹配比如你在struts-config.xml中引入的文件是struts-config_1_2.dtd，你可以去org.apache.struts.resources包下看有没有struts-config_1_2.dtd文件，如果没有放一个进去放进去，之后还报这个错误，就看看Struts包的版本是不是1.2
　　有的时候工程中有错误也会报这个错误
　　09:17:17,906 ERROR [ActionServlet] Parsing error processing resource path java.net.UnknownHostException: struts.apache.org at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:153) at java.net.Socket.connect(Socket.java:452) at java.net.Socket.connect(Socket.java:402) at sun.net.NetworkClient.doConnect(NetworkClient.java:139) at sun.net.www.http.HttpClient.openServer(HttpClient.java:402) at sun.net.www.http.HttpClient.openServer(HttpClient.java:618) at sun.net.www.http.HttpClient.(HttpClient.java:306) at sun.net.www.http.HttpClient.(HttpClient.java:267) at sun.net.www.http.HttpClient.New(HttpClient.java:339) at sun.net.www.http.HttpClient.New(HttpClient.java:320) at sun.net.www.http.HttpClient.New(HttpClient.java:315) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:512) at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:489) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:617) at java.net.URL.openStream(URL.java:913) at org.apache.xerces.readers.DefaultReaderFactory.createReader(DefaultReaderFactory.java:149) at org.apache.xerces.readers.DefaultEntityHandler.startReadingFromExternalEntity(DefaultEntityHandler.java:767) at org.apache.xerces.readers.DefaultEntityHandler.startReadingFromExternalSubset(DefaultEntityHandler.java:566) at org.apache.xerces.framework.XMLDTDScanner.scanDoctypeDecl(XMLDTDScanner.java:1139) at org.apache.xerces.framework.XMLDocumentScanner.scanDoctypeDecl(XMLDocumentScanner.java:2145) at org.apache.xerces.framework.XMLDocumentScanner.access$0(XMLDocumentScanner.java:2100) at org.apache.xerces.framework.XMLDocumentScanner$PrologDispatcher.dispatch(XMLDocumentScanner.java:831) at org.apache.xerces.framework.XMLDocumentScanner.parseSome(XMLDocumentScanner.java:381) at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:1081) at org.apache.commons.digester.Digester.parse(Digester.java:1572) at org.apache.struts.action.ActionServlet.initModuleConfig(ActionServlet.java:944) at org.apache.struts.action.ActionServlet.init(ActionServlet.java:468) at javax.servlet.GenericServlet.init(GenericServlet.java:256) at org.mortbay.jetty.servlet.ServletHolder.start(ServletHolder.java:219) at org.mortbay.jetty.servlet.ServletHandler.initializeServlets(ServletHandler.java:436) at org.mortbay.jetty.servlet.WebApplicationHandler.initializeServlets(WebApplicationHandler.java:150) at org.mortbay.jetty.servlet.WebApplicationContext.start(WebApplicationContext.java:442) at org.mortbay.j2ee.J2EEWebApplicationContext.start(J2EEWebApplicationContext.java:85) at org.jboss.jetty.JBossWebApplicationContext.start(JBossWebApplicationContext.java:89) at org.jboss.jetty.Jetty.deploy(Jetty.java:331) at org.jboss.jetty.JettyService.performDeploy(JettyService.java:242) at org.jboss.web.AbstractWebContainer.start(AbstractWebContainer.java:357) at org.jboss.deployment.MainDeployer.start(MainDeployer.java:832) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:640) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:613) at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:549) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177) at $Proxy7.deploy(Unknown Source) at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:302) at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:476) at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:200) at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:273) at org.jboss.system.ServiceMBeanSupport.start(ServiceMBeanSupport.java:192) 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:324) at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:549) at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:966) at $Proxy0.start(Unknown Source) at org.jboss.system.ServiceController.start(ServiceController.java:392) at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:549) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177) at $Proxy5.start(Unknown Source) at org.jboss.deployment.SARDeployer.start(SARDeployer.java:226) at org.jboss.deployment.MainDeployer.start(MainDeployer.java:832) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:640) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:613) at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:597) 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:324) at org.jboss.mx.capability.ReflectedMBeanDispatcher.invoke(ReflectedMBeanDispatcher.java:284) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:549) at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:177) at $Proxy6.deploy(Unknown Source) at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:365) at org.jboss.system.server.ServerImpl.start(ServerImpl.java:272) at org.jboss.Main.boot(Main.java:150) at org.jboss.Main$1.run(Main.java:388) at java.lang.Thread.run(Thread.java:534)