Struts2的過濾器，說明問題

Question

請解決this.I是新來struts2.i使用Hibernate 3.1.thanks提前

SEVERE: Exception starting filter struts2 
Class: com.opensymphony.xwork2.spring.SpringObjectFactory 
File: SpringObjectFactory.java 
Method: getClassInstance 
Line: 209 - com/opensymphony/xwork2/spring/SpringObjectFactory.java:209:-1 
    at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:431) 
    at org.apache.struts2.dispatcher.FilterDispatcher.init(FilterDispatcher.java:190) 
    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: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: java.lang.NullPointerException 
    at com.opensymphony.xwork2.spring.SpringObjectFactory.getClassInstance(SpringObjectFactory.java:209) 
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.verifyResultType(XmlConfigurationProvider.java:519) 
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addResultTypes(XmlConfigurationProvider.java:490) 
    at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.addPackage(XmlConfigurationProvider.java:446) 
    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) 
    at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374) 
    at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418) 
    ... 28 more 
Apr 12, 2012 11:48:51 AM org.apache.catalina.core.StandardContext start 
SEVERE: Error filterStart 
Apr 12, 2012 11:48:51 AM org.apache.catalina.core.StandardContext start 
SEVERE: Context [/Struts2Hibernat] startup failed due to previous errors 

Answer 1

Umesh製作Awasthi我是正確的。您需要提供更多信息才能解決此問題。如果你使用spring來創建你的動作，這裏是你需要做的。

1. 請確保您的類路徑中有struts2-spring-plugin。
2. 用Spring的@Component註釋你的動作類。例如@Component（「myActionName」）或使用java.inject.Named（JSR330）@Named。例如@Named（ 「myActionName」）。

3. 您還需要對struts.xml進行其他更改。以下內容添加到它

4. 接下來在你的行動，而不是元素的引用在類Action類的完整類路徑屬性利用傳遞到@Named或@Component值。例如class =「myActionName」

希望這會有所幫助。 如果您需要更多解釋，請與我聯繫。