Unable to load configuration. - action异常

严重: Exception starting filter struts2

Unable to load configuration. - action - file:/D:/Documents%20and%20Settings/Administrator/Workspaces/MyEclipse%208.6/.metadata/.me_tcat/webapps/SH/WEB-INF/classes/struts.xml:9:43

at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:450)

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: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:3693)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:4340)

at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)

at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)

at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)

at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:920)

at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:883)

at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)

at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1138)

at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)

at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)

at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)

at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)

at org.apache.catalina.core.StandardService.start(StandardService.java:516)

at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)

at org.apache.catalina.startup.Catalina.start(Catalina.java:566)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:601)

at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)

at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)

Caused by: Unable to load configuration. - action - file:/D:/Documents%20and%20Settings/Administrator/Workspaces/MyEclipse%208.6/.metadata/.me_tcat/webapps/SH/WEB-INF/classes/struts.xml:9:43

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:437)

... 29 more

Caused by: Action class [studentAction.AddMessageAction] not found - action - file:/D:/Documents%20and%20Settings/Administrator/Workspaces/MyEclipse%208.6/.metadata/.me_tcat/webapps/SH/WEB-INF/classes/struts.xml:9:43

at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyAction(XmlConfigurationProvider.java:434)

at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:378)

at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:495)

at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:286)

at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:112)

at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:234)

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

... 31 more

通常碰见这种问题大多数原因是struts.xml配置出现了问题。

<package name="default" extends="struts-default" namespace="/">

<action name="lookMessageAction"

class="studentAction.AddMessageAction">

<result name="success">lookMessage.jsp</result>

<result name="input">/student/index.jsp</result>

</action>

</package>

检查1：这里的<result name="..">是不是被改成了<result type="..">

检查2：class 引用的包名有没有出错。

对于大多数初学者（比如我），常常因为在学习的过程中，复制粘贴学习借鉴，而忘记了改包名，于是犯了第二种错误。。十分难过。