是否struts 2包必須擴展「struts-default」？

Question

我在struts.xml宣佈了一個包。但是tomcat6無法啓動，因爲我添加了它。在struts.xml的配置是：

<package name="pkg2" namespace="/0314"> 

    <interceptors> 
     <interceptor name="myInterceptor" class="com.chailie.test4.MyInterceptor"/> 
     <interceptor-stack name="myInterceptorStack"> 
      <interceptor-ref name="myInterceptor"/> 
     </interceptor-stack> 
    </interceptors> 
    <global-results> 
     <result name="success">/success.jsp</result> 
    </global-results> 
    <action name="test1" class="com.chailie.test4.HelloWorld1">   
     <result name="success">/success.jsp</result> 
     <interceptor-ref name="myInterceptorStack"/> 
    </action> 
</package> 

當我啓動的tomcat6異常的堆棧跟蹤是：

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 

一旦予添加延伸在包= '支柱默認' 作爲

<package name="pkg2" namespace="/0314" extends='struts-default'> 

<interceptors> 
    <interceptor name="myInterceptor" class="com.chailie.test4.MyInterceptor"/> 
    <interceptor-stack name="myInterceptorStack"> 
     <interceptor-ref name="myInterceptor"/> 
    </interceptor-stack> 
</interceptors> 
<global-results> 
    <result name="success">/success.jsp</result> 
</global-results> 
<action name="test1" class="com.chailie.test4.HelloWorld1">   
    <result name="success">/success.jsp</result> 
    <interceptor-ref name="myInterceptorStack"/> 
</action> 
</package> 

的tomcat6可以正常啓動。

所以我的問題是當我在struts.xml中添加一個「包」。包是否必須從「struts-default」包中擴展？我google了這個，但「擴展」屬性只是包元素的選項屬性。那麼爲什麼我會遇到這個問題呢？

Answer 1

檢查原始strus-default.xml，你會發現它定義了所有的默認攔截器和結果，你沒有定義你的結果，這就是爲什麼最有可能失敗。 我現在無法測試它，但我會假設如果您添加了調度程序結果和默認類引用的定義，那麼它應該在不擴展它的情況下啓動。

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


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