調試facelets-1.1.14的異常解決

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調試facelets-1.1.14的異常解決

部署Hangman例子，其WEB-INF/lib下包含如下JAR包：

· servlet-api-2.4.jar

· jsf-facelets.jar

· jsf-api-1.2_04-p02.jar

· el-impl-1.0.jar

· el-api-1.0.jar

· custom_jsf_lib_1_0_2.jar

但出現以下錯誤：

嚴重: Servlet /hangman threw load() exception

java.lang.IllegalStateException: Application was not properly initialized at startup, could not find Factory: javax.faces.context.FacesContextFactory

at javax.faces.FactoryFinder.getFactory(FactoryFinder.java:256)

at javax.faces.webapp.FacesServlet.init(FacesServlet.java:142)

at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)

at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:993)

at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4149)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:4458)

at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1173)

at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1271)

at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:296)

at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)

at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1337)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1601)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1610)

at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1590)

at java.lang.Thread.run(Thread.java:619)

原因是缺少JAR包。繼續添加JAR包：

· commons-beanutils.jar

· commons-collections.jar

· commons-digester.jar

· commons-logging.jar

· jsf-impl.jar

又出現以下錯誤：

嚴重: Exception sending context initialized event to listener instance of class com.sun.faces.config.ConfigureListener

java.lang.LinkageError: loader constraint violation: when resolving interface method "javax.servlet.jsp.JspApplicationContext.getExpressionFactory()Ljavax/el/ExpressionFactory;" the class loader (instance of org/apache/catalina/loader/WebappClassLoader) of the current class, com/sun/faces/config/ConfigureListener, and the class loader (instance of org/apache/catalina/loader/StandardClassLoader) for resolved class, javax/servlet/jsp/JspApplicationContext, have different Class objects for the type javax/el/ExpressionFactory used in the signature

at com.sun.faces.config.ConfigureListener.registerELResolverAndListenerWithJsp(ConfigureListener.java:1570)

at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:403)

at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3934)

at org.apache.catalina.core.StandardContext.start(StandardContext.java:4429)

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:526)

at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:850)

at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:724)

at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:493)

at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1206)

at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:314)

at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)

at org.apache.catalina.core.StandardHost.start(StandardHost.java:722)

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:583)

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)

分析原因，是el-api-1.0.jar包與現有JAR包存在沖突，删之。最終庫檔案如下：

搞定。親切的頁面出現，如下所示：