为了避免“NoClassDefFoundError：com / sun / facelets / tag / jsf / ComponentHandler”，我需要哪些罐子？

时间：2012-02-10 14:03:12

标签： jsf facelets myfaces

我正在尝试构建一个JavaServer Faces 2.0项目（通过Eclipse Indigo使用Apache Myfaces 2.0.2 + Tomcat 7.0.25）。所有似乎都已设置，Tomcat启动正常，但当我尝试打开网页时，我收到错误：

  

严重：发生了异常   javax.faces.FacesException：java.lang.NoClassDefFoundError：com / sun / facelets / tag / jsf / ComponentHandler

据我所知，缺少一些jar，有一个这个类：com.sun.facelets.tag.jsf.ComponentHandler。

Jar finder告诉我，我应该有“jsf-facelets.jar”（http://www.jarfinder.com/index.php/java/info/com.sun.facelets.tag.jsf.ComponentHandler/） 。

但是，http://facelets.java.net/没有下载部分。

我需要哪些罐子？为什么MyFaces不够用？ 

INFO: Server startup in 20457 ms
10.02.2012. 15:51:03 org.apache.myfaces.renderkit.ErrorPageWriter handleThrowable
SEVERE: An exception occurred
javax.faces.FacesException: java.lang.NoClassDefFoundError: com/sun/facelets/tag/jsf/ComponentHandler
    at org.apache.myfaces.shared_impl.context.ExceptionHandlerImpl.wrap(ExceptionHandlerImpl.java:241)
    at org.apache.myfaces.shared_impl.context.ExceptionHandlerImpl.handle(ExceptionHandlerImpl.java:156)
    at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:191)
    at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
    at javax.faces.webapp.FacesServlet.service(FacesServlet.java:189)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1805)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: com/sun/facelets/tag/jsf/ComponentHandler
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(Unknown Source)
    at java.lang.ClassLoader.defineClass(Unknown Source)
    at java.security.SecureClassLoader.defineClass(Unknown Source)
    at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2836)
    at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1160)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1668)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1546)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at org.apache.myfaces.shared_impl.util.ClassUtils.classForName(ClassUtils.java:178)
    at org.apache.myfaces.view.facelets.util.ReflectionUtil.forName(ReflectionUtil.java:67)
    at org.apache.myfaces.view.facelets.compiler.TagLibraryConfig$LibraryHandler.createClass(TagLibraryConfig.java:475)
    at org.apache.myfaces.view.facelets.compiler.TagLibraryConfig$LibraryHandler.endElement(TagLibraryConfig.java:373)
    at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
    at org.apache.xerces.impl.dtd.XMLNSDTDValidator.endNamespaceScope(Unknown Source)
    at org.apache.xerces.impl.dtd.XMLDTDValidator.handleEndElement(Unknown Source)
    at org.apache.xerces.impl.dtd.XMLDTDValidator.endElement(Unknown Source)
    at org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown Source)
    at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown Source)
    at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
    at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
    at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
    at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
    at org.apache.xerces.jaxp.SAXParserImpl.parse(Unknown Source)
    at javax.xml.parsers.SAXParser.parse(Unknown Source)
    at org.apache.myfaces.view.facelets.compiler.TagLibraryConfig.create(TagLibraryConfig.java:632)
    at org.apache.myfaces.view.facelets.compiler.TagLibraryConfig.loadImplicit(TagLibraryConfig.java:670)
    at org.apache.myfaces.view.facelets.compiler.Compiler.initialize(Compiler.java:93)
    at org.apache.myfaces.view.facelets.compiler.Compiler.compileViewMetadata(Compiler.java:125)
    at org.apache.myfaces.view.facelets.impl.DefaultFaceletFactory._createViewMetadataFacelet(DefaultFaceletFactory.java:311)
    at org.apache.myfaces.view.facelets.impl.DefaultFaceletFactory.getViewMetadataFacelet(DefaultFaceletFactory.java:394)
    at org.apache.myfaces.view.facelets.impl.DefaultFaceletFactory.getViewMetadataFacelet(DefaultFaceletFactory.java:376)
    at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage._getViewMetadataFacelet(FaceletViewDeclarationLanguage.java:1902)
    at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.access$000(FaceletViewDeclarationLanguage.java:128)
    at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage$FaceletViewMetadata.createMetadataView(FaceletViewDeclarationLanguage.java:2136)
    at org.apache.myfaces.lifecycle.RestoreViewExecutor.execute(RestoreViewExecutor.java:161)
    at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:171)
    ... 18 more
Caused by: java.lang.ClassNotFoundException: com.sun.facelets.tag.jsf.ComponentHandler
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1701)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1546)
    ... 58 more

2 个答案:

答案 0 :(得分：2)

stacktrace中的相关部分：

Caused by: java.lang.NoClassDefFoundError: com/sun/facelets/tag/jsf/ComponentHandler
    ...
    at org.apache.myfaces.view.facelets.compiler.TagLibraryConfig$LibraryHandler.createClass(TagLibraryConfig.java:475)
    at org.apache.myfaces.view.facelets.compiler.TagLibraryConfig$LibraryHandler.endElement(TagLibraryConfig.java:373)

你的webapp中有一个Facelets 1.x标签库，我觉得它是一个自定义的，因为你似乎没有使用JSF 1.x目标组件库（例如RichFaces 3.x或Tomahawk for JSF 1） 。X）。在您的webapp中查找*.taglib.xml个文件（它们通常位于/WEB-INF或/META-INF）并更新其XML根声明，以符合以下要求的Facelets 2.0：

<facelet-taglib 
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facelettaglibrary_2_0.xsd"
    version="2.0">

另见：

答案 1 :(得分：1)

好的，问题是当我使用JSF 2.0时，我在JSF 1.2中使用Tomahawk而不是使用Tomahawk for JSF 2.0。

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