struts2.3错误: "严重: Dispatcher initialization failed Unable to load configuration"

错误的详细信息：

严重: Dispatcher initialization failed

Unable to load configuration. - Class: com.sun.org.apache.xml.internal.serializer.OutputPropertiesFactory

File: OutputPropertiesFactory.java

Method: getDefaultMethodProperties

Line: 320 - com/sun/org/apache/xml/internal/serializer/OutputPropertiesFactory.java:320:-1

at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:69)

at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:390)

at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:436)

at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)

at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)

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.deployDescriptor(HostConfig.java:675)

at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:601)

at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)

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(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: Caught exception while loading file struts-default.xml - Class: com.sun.org.apache.xml.internal.serializer.OutputPropertiesFactory

File: OutputPropertiesFactory.java

Method: getDefaultMethodProperties

Line: 320 - com/sun/org/apache/xml/internal/serializer/OutputPropertiesFactory.java:320:-1

at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:950)

at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadDocuments(XmlConfigurationProvider.java:155)

at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.init(XmlConfigurationProvider.java:122)

at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:205)

at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)

... 31 more

Caused by: com.sun.org.apache.xml.internal.serializer.utils.WrappedRuntimeException: 无法为输出方法“xml”装载属性文件“output_xml.properties”（检查 CLASSPATH）

at com.sun.org.apache.xml.internal.serializer.OutputPropertiesFactory.getDefaultMethodProperties(OutputPropertiesFactory.java:320)

at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.setDefaults(TransformerImpl.java:1119)

at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.createOutputProperties(TransformerImpl.java:1080)

at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.<init>(TransformerImpl.java:246)

at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.<init>(TransformerImpl.java:237)

at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTransformer(TransformerFactoryImpl.java:592)

at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl.newTransformerHandler(TransformerFactoryImpl.java:883)

at com.opensymphony.xwork2.util.DomHelper$DOMBuilder.setup(DomHelper.java:198)

at com.opensymphony.xwork2.util.DomHelper$DOMBuilder.<init>(DomHelper.java:190)

at com.opensymphony.xwork2.util.DomHelper$DOMBuilder.<init>(DomHelper.java:181)

at com.opensymphony.xwork2.util.DomHelper$DOMBuilder.<init>(DomHelper.java:167)

at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:107)

at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:941)

... 35 more

2012-5-18 16:18:32 org.apache.catalina.core.StandardContext filterStart

严重: Exception starting filter struts2

Unable to load configuration. - Class: com.sun.org.apache.xml.internal.serializer.OutputPropertiesFactory

File: OutputPropertiesFactory.java

Method: getDefaultMethodProperties

Line: 320 - com/sun/org/apache/xml/internal/serializer/OutputPropertiesFactory.java:320:-1

at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:449)