struts 2 运行时提示以下错误，但是项目考到别人电脑就可以运行

Question

13:24:38.370 [localhost-startStop-1] ERROR org.apache.struts2.dispatcher.Dispatcher - Dispatcher initialization failed
com.opensymphony.xwork2.config.ConfigurationException: Unable to load configuration.
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:70) ~[xwork-core-2.3.24.jar:2.3.24]
at org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:967) ~[struts2-core-2.3.24.jar:2.3.24]
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:435) ~[struts2-core-2.3.24.jar:2.3.24]
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:479) [struts2-core-2.3.24.jar:2.3.24]
at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74) [struts2-core-2.3.24.jar:2.3.24]
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:57) [struts2-core-2.3.24.jar:2.3.24]
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279) [catalina.jar:7.0.82]
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260) [catalina.jar:7.0.82]
at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:105) [catalina.jar:7.0.82]
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4950) [catalina.jar:7.0.82]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5652) [catalina.jar:7.0.82]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145) [catalina.jar:7.0.82]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1700) [catalina.jar:7.0.82]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1690) [catalina.jar:7.0.82]
at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_131]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_131]
Caused by: com.opensymphony.xwork2.config.ConfigurationException: Action class [dao.mmda] not found
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyAction(XmlConfigurationProvider.java:486) ~[xwork-core-2.3.24.jar:2.3.24]
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:429) ~[xwork-core-2.3.24.jar:2.3.24]
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:556) ~[xwork-core-2.3.24.jar:2.3.24]
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:295) ~[xwork-core-2.3.24.jar:2.3.24]
at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:112) ~[struts2-core-2.3.24.jar:2.3.24]
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:264) ~[xwork-core-2.3.24.jar:2.3.24]
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67) ~[xwork-core-2.3.24.jar:2.3.24]
... 17 more
十二月 01, 2017 1:24:38 下午 org.apache.catalina.core.StandardContext filterStart
严重: Exception starting filter struts2
Unable to load configuration. - action - file:/D:/Program%20Files/apache-tomcat-7.0.82/webapps/HelloStrtus2/WEB-INF/classes/struts.xml:27:44
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:493)
at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:74)
at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:57)
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:279)
at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:260)
at org.apache.catalina.core.ApplicationFilterConfig.(ApplicationFilterConfig.java:105)
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4950)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5652)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1700)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1690)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: Unable to load configuration. - action - file:/D:/Program%20Files/apache-tomcat-7.0.82/webapps/HelloStrtus2/WEB-INF/classes/struts.xml:27:44
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:70)
at org.apache.struts2.dispatcher.Dispatcher.getContainer(Dispatcher.java:967)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:435)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:479)
... 14 more
Caused by: Action class [dao.mmda] not found - action - file:/D:/Program%20Files/apache-tomcat-7.0.82/webapps/HelloStrtus2/WEB-INF/classes/struts.xml:27:44
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyAction(XmlConfigurationProvider.java:486)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:429)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:556)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:295)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:112)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:264)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:67)
... 17 more

Answer 1

分析一下这里。
Action class [dao.mmda] not found - action - file:/D:/Program%20Files/apache-tomcat-7.0.82/webapps/HelloStrtus2/WEB-INF/classes/struts.xml:27:44