Caught exception while loading file struts-default.xml - [unknown location]

Caught exception while loading file struts-default.xml - [unknown location]
文章分类:Java编程 

 严重: Exception starting filter Struts2 
Caught exception while loading file struts-default.xml - [unknown location] 
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:839) 
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadDocuments(XmlConfigurationProvider.java:131) 
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.init(XmlConfigurationProvider.java:100) 
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reload(DefaultConfiguration.java:130) 
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:52) 
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:395) 
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:452) 
at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:201) 
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:275) 
at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:397) 
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:108) 
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:3696) 
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4343) 
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3086) 
at org.apache.catalina.loader.WebappLoader.backgroundProcess(WebappLoader.java:404) 
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1309)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601) 
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610) 
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610) 
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590) 
at java.lang.Thread.run(Thread.java:619) 
Caused by: java.lang.ClassCastException: org.apache.xerces.parsers.XML11Configuration cannot be cast to org.apache.xerces.xni.parser.XMLParserConfiguration 
at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source) 
at org.apache.xerces.parsers.DOMParser.<init>(Unknown Source) 
at org.apache.xerces.jaxp.DocumentBuilderImpl.<init>(Unknown Source) 
at org.apache.xerces.jaxp.DocumentBuilderFactoryImpl.newDocumentBuilder(Unknown Source) 
at com.sun.org.apache.xalan.internal.xsltc.trax.SAX2DOM.<init>(SAX2DOM.java:69) 
at com.sun.org.apache.xalan.internal.xsltc.runtime.output.TransletOutputHandlerFactory.getSerializationHandler(TransletOutputHandlerFactory.java:187)

 

jar包有冲突, 应该是XML解析包有冲突. 检查发布后的WEB-INF/lib有两个XML解析包: xml-apis.jar和xerces-2.6.2.jar 这种错误真正原因不是JDK 6和Struts 2冲突, 而是 MyEclipse Hibernate 类库中多了两个包: xml-apis.jar和xerces-2.6.2.jar, 这两个包的功能和JDK的冲突了. 解决办法: 1. 删除发布后目录的 WEB-INF/lib/ 下的这两个文件; 2. 或者使用JDK 1.5来启动Tomcat 6.