【发布时间】：2012-09-08 04:46:39
【问题描述】：
尝试在 Eclipse 中运行我的应用程序时出现以下异常。
Caused by: Unable to load configuration. - Class: java.net.AbstractPlainSocketImpl
File: AbstractPlainSocketImpl.java
Method: connect
Line: 158 - java/net/AbstractPlainSocketImpl.java:158:-1
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418)
... 20 more
Caused by: Unable to load jar:file:/var/lib/tomcat6/webapps/webapps/cute/WEB- INF/lib /struts2-jfreechart-plugin-2.3.4.jar!/struts-plugin.xml - Class: java.net.AbstractPlainSocketImpl
File: AbstractPlainSocketImpl.java
Method: connect
Line: 158 - java/net/AbstractPlainSocketImpl.java:158:-1
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:898)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadDocuments(XmlConfigurationProvider.java:143)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.init(XmlConfigurationProvider.java:110)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:168)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
... 22 more
Caused by: struts.apache.org - Class: java.net.AbstractPlainSocketImpl
File: AbstractPlainSocketImpl.java
Method: connect
Line: 158 - java/net/AbstractPlainSocketImpl.java:158:-1
at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:115)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:893)
... 26 more
Caused by: java.net.UnknownHostException: struts.apache.org
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:158)
at java.net.Socket.connect(Socket.java:546)
at java.net.Socket.connect(Socket.java:495)
at sun.net.NetworkClient.doConnect(NetworkClient.java:174)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:409)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:530)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:240)
at sun.net.www.http.HttpClient.New(HttpClient.java:321)
at sun.net.www.http.HttpClient.New(HttpClient.java:338)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:814)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:755)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:680)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1005)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(XMLEntityManager.java:653)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(XMLEntityManager.java:1291)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(XMLEntityManager.java:1258)
at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(XMLDTDScannerImpl.java:259)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(XMLDocumentScannerImpl.java:1167)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(XMLDocumentScannerImpl.java:1064)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(XMLDocumentScannerImpl.java:977)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:624)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:116)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:486)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:810)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:740)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:110)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1208)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:525)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:392)
at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:113)
... 27 more
我已经在 Eclipse 中配置了默认服务器，并将 jar 文件添加到路径中。将 jar 文件放在 lib 文件夹中。
【问题讨论】：
-
hmmm，当它试图检索配置文件的
.dtd时，几乎看起来好像问题正在发生。也许您可以尝试将 DTD 复制并粘贴到配置文件的顶部，然后查看错误是否消失。当然，这不是一个很好的“解决方案”，但如果它有效，那么你就有了一些有效的方法，并且知道问题出在哪里。 -
我认为我没有解决方案。我没有使用任何 DTD。
-
您没有使用 struts.xml 文件吗？如果您正在使用它，那么它可能会以
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd">的形式引用顶部的 dtd。将其替换为 dtd 内容（您可以从 URL 下载）。对您拥有的任何配置文件、struts.xml、validation.xml 文件等执行此操作。 -
顺便说一句，openjdk 中的事情有时会变得很奇怪。我最近遇到了一些关于播放框架 + jasper 报告仅在 openjdk 上无法正确解析 bean 的问题，我们必须创建一个自定义解析器。哦，快乐！
-
是的，你是对的。互联网连接是问题。下载了 DTD，现在没问题..Thanks@rees
标签： linux struts2 tomcat6 jfreechart openjdk