Struts2 struts 2包是否必须扩展“struts默认值”？

我在struts.xml中声明了一个包。但tomcat6无法启动，因为我添加了它。struts.xml中的配置为：

/success.jsp /success.jsp 启动tomcat6时，异常的堆栈跟踪是：

INFO: Choosing bean (struts) for interface org.apache.struts2.dispatcher.StaticContentLoader
三月 14, 2013 10:07:52 下午 com.opensymphony.xwork2.util.logging.jdk.JdkLogger info
INFO: Choosing bean (struts) for interface com.opensymphony.xwork2.UnknownHandlerManager
三月 14, 2013 10:07:53 下午 com.opensymphony.xwork2.util.logging.jdk.JdkLogger error
SEVERE: Dispatcher initialization failed
Unable to load configuration. - result - file:/C:/tomcat6/webapps/sstart/WEB-INF/classes/struts.xml:57:27
    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:69)
    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.deployDirectory(HostConfig.java:1079)
    at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1002)
    at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:506)
    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: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:289)
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: No result type specified for result named 'success', perhaps the parent package does not specify the result type? - result - file:/C:/tomcat6/webapps/sstart/WEB-INF/classes/struts.xml:57:27
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.buildResults(XmlConfigurationProvider.java:636)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadGlobalResults(XmlConfigurationProvider.java:807)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:477)
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:278)
    at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:112)
    at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:204)
    at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:66)
    ... 31 more

三月 14, 2013 10:07:53 下午 org.apache.catalina.core.StandardContext start
SEVERE: Error filterStart
三月 14, 2013 10:07:53 下午 org.apache.catalina.core.StandardContext start
SEVERE: Context [/sstart] startup failed due to previous errors
三月 14, 2013 10:07:53 下午 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap

一旦我在包中添加extends='struts-default'作为

/success.jsp /success.jsp tomcat6可以正常启动

所以我的问题是当我在struts.xml中添加一个包时。包是否必须从struts默认包扩展？我在谷歌上搜索了这个，但extends属性只是package元素的一个option属性。那我为什么会有这个问题呢？

检查原始版本，你会发现它定义了所有默认的拦截器和结果，你没有在自己的版本中定义结果，这就是为什么它很可能失败的原因。 我现在无法测试它，但我假设如果您添加dispatcher结果的定义和默认类引用，那么它应该在不扩展它的情况下启动

 <result-types>
     <result-type name="dispatcher" class="org.apache.struts2.dispatcher.ServletDispatcherResult" default="true"/>
 </result-types>


 <default-class-ref class="com.opensymphony.xwork2.ActionSupport" />

检查原始版本，您将看到它定义了所有默认的拦截器和结果，而您没有在自己的版本中定义结果，这就是最有可能失败的原因。 我现在无法测试它，但我假设如果您添加dispatcher结果的定义和默认类引用，那么它应该在不扩展它的情况下启动

 <result-types>
     <result-type name="dispatcher" class="org.apache.struts2.dispatcher.ServletDispatcherResult" default="true"/>
 </result-types>


 <default-class-ref class="com.opensymphony.xwork2.ActionSupport" />