Unable to load configuration ， json
2011-6-10 16:17:58 org.apache.catalina.core.AprLifecycleListener init
資訊: Loaded APR based Apache Tomcat Native library 1.1.10.
2011-6-10 16:17:58 org.apache.catalina.core.AprLifecycleListener init
資訊: APR capabilities: IPv6 [false], sendfile [true], accept filters [false], random [true].
2011-6-10 16:17:58 org.apache.coyote.http11.Http11AprProtocol init
資訊: Initializing Coyote HTTP/1.1 on http-8080
2011-6-10 16:17:58 org.apache.coyote.ajp.AjpAprProtocol init
資訊: Initializing Coyote AJP/1.3 on ajp-8009
2011-6-10 16:17:58 org.apache.catalina.startup.Catalina load
資訊: Initialization processed in 819 ms
2011-6-10 16:17:58 org.apache.catalina.core.StandardService start
資訊: Starting service Catalina
2011-6-10 16:17:58 org.apache.catalina.core.StandardEngine start
資訊: Starting Servlet Engine: Apache Tomcat/6.0.18
log4j:WARN No appenders could be found for logger (com.opensymphony.xwork2.config.providers.XmlConfigurationProvider).
log4j:WARN Please initialize the log4j system properly.
2011-6-10 16:18:01 org.apache.catalina.core.ApplicationContext log
資訊: Initializing Spring root WebApplicationContext
log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader).
log4j:WARN Please initialize the log4j system properly.
2011-6-10 16:18:04 org.apache.catalina.core.StandardContext filterStart
嚴重: Exception starting filter struts2
Unable to load configuration. - action - file:/D:/tomcat-6.0.18/webapps/reg_login/WEB-INF/classes/struts.xml:28:71
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:431)
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: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:3709)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4363)
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:926)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:889)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)
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:578)
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:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: Unable to load configuration. - action - file:/D:/tomcat-6.0.18/webapps/reg_login/WEB-INF/classes/struts.xml:28:71
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:58)
at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374)
at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418)
... 29 more
Caused by: Error building results for action validateName in namespace - action - file:/D:/tomcat-6.0.18/webapps/reg_login/WEB-INF/classes/struts.xml:28:71
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:367)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:468)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadPackages(XmlConfigurationProvider.java:264)
at org.apache.struts2.config.StrutsXmlConfigurationProvider.loadPackages(StrutsXmlConfigurationProvider.java:111)
at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:193)
at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
... 31 more
Caused by: There is no result type defined for type 'json' mapped with name 'success'. Did you mean 'json'? - result - file:/D:/tomcat-6.0.18/webapps/reg_login/WEB-INF/classes/struts.xml:30:41
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.buildResults(XmlConfigurationProvider.java:621)
at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addAction(XmlConfigurationProvider.java:365)
... 36 more
2011-6-10 16:18:04 org.apache.catalina.core.StandardContext start
嚴重: Error filterStart
2011-6-10 16:18:04 org.apache.catalina.core.StandardContext start
嚴重: Context [/reg_login] startup failed due to previous errors
2011-6-10 16:18:04 org.apache.catalina.core.ApplicationContext log
資訊: Closing Spring root WebApplicationContext
log4j:ERROR LogMananger.repositorySelector was null likely due to error in class reloading, using NOPLoggerRepository.
2011-6-10 16:18:05 org.apache.coyote.http11.Http11AprProtocol start
資訊: Starting Coyote HTTP/1.1 on http-8080
2011-6-10 16:18:05 org.apache.coyote.ajp.AjpAprProtocol start
資訊: Starting Coyote AJP/1.3 on ajp-8009
2011-6-10 16:18:05 org.apache.catalina.startup.Catalina start
資訊: Server startup in 6642 ms
解決方法：
<package name="jiahan" extends="struts-default,json-default">
<!-- 配置處理使用者登入的Action-->
<action name="login" class="reg_login.action.UserAction"
method="login">
<!-- 配置處理使用者登入後的Result -->
<result name="input">/WEB-INF/login.jsp</result>
<result name="success">/WEB-INF/main.jsp</result>
</action>
<!-- 配置處理使用者註冊的Action-->
<action name="regist" class="reg_login.action.UserAction"
method="regist">
<!-- 配置處理使用者登入後的Result -->
<result name="input">/WEB-INF/regist.jsp</result>
<result name="success">/WEB-INF/login.jsp</result>
</action>
<!-- 配置驗證使用者名稱是否可用的Action-->
<action name="validateName" class="reg_login.action.ValidateAction">
<!-- 該Action只有一個Result，型別為json -->
<result name="success" type="json" />
</action>
</package>