部署JSF Web应用程序会导致java.lang.ClassNotFoundException:javax.servlet.jsp.jstl.core.Config [英] Deploying a JSF webapp results in java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config
问题描述
启动JavaServer Faces应用程序时出现错误.在浏览器上，我收到以下错误:
I get an error, when I started my JavaServer Faces application. On the browser I get following error:
HTTP Status 500 -
--------------------------------------------------------------------------------
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: javax/servlet/jsp/jstl/core/Config
javax.faces.webapp.FacesServlet.service(FacesServlet.java:229)
root cause
java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config
org.apache.myfaces.view.jsp.JspViewDeclarationLanguage.buildView(JspViewDeclarationLanguage.java:91)
org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:77)
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:241)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:199)
root cause
java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
org.apache.myfaces.view.jsp.JspViewDeclarationLanguage.buildView(JspViewDeclarationLanguage.java:91)
org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:77)
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:241)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:199)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.12 logs.
在我的Eclipse IDE中出现以下错误:
On my Eclipse IDE follwoing error:
Nov 19, 2013 8:37:17 PM org.apache.catalina.startup.Catalina start
Information: Server startup in 2518 ms
Nov 19, 2013 8:37:18 PM org.apache.catalina.core.StandardWrapperValve invoke
Schwerwiegend: Servlet.service() for servlet [Faces Servlet] in context with path [/de.xxx.jsf.first] threw exception [javax/servlet/jsp/jstl/core/Config] with root cause
java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
at org.apache.myfaces.view.jsp.JspViewDeclarationLanguage.buildView(JspViewDeclarationLanguage.java:91)
at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:77)
at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:241)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:199)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
这是怎么引起的，我该如何解决?
How is this caused and how can I solve it?
推荐答案
java.lang.ClassNotFoundException:javax.servlet.jsp.jstl.core.Config
java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config
A ClassNotFoundException表示运行时类路径中缺少指定的类.像包名所示，它是 JSTL 的一部分.
A ClassNotFoundException means that the specified class is missing in the runtime classpath. As the package name hints, it's part of JSTL.
JSF (more specifically, Facelets) has indeed a dependency on JSTL for the <c:xxx> tags. When JSF loads, it's implicitly also loading JSTL core taglib configuration. However, if it cannot be found, you'll get exactly this exception.
JSTL(和JSF！)通常已经在Java EE容器(例如JBoss AS/EAP/WildFly，GlassFish，TomEE，WebLogic等)上提供.但是，您使用的是Tomcat，这是准系统的JSP/Servlet容器，并且未随JSTL一起提供.如果升级到TomEE不是一种选择，您需要像向JSF一样手动提供JSTL和Web应用程序.
JSTL (and JSF!) is normally already provided out the box on Java EE container such as JBoss AS/EAP/WildFly, GlassFish, TomEE, WebLogic, etcetera. However, you're using Tomcat, which is a barebones JSP/Servlet container and doesn't ship with JSTL out the box. If upgrading to e.g. TomEE is not an option, you'd need to manuall supply JSTL along with the webapp, like as you did for JSF.
只需下载 jstl-1.2.jar 并将其与JSF JAR一起拖放到Webapp的/WEB-INF/lib文件夹中.
Just download jstl-1.2.jar and drop it in /WEB-INF/lib folder of your webapp, along with the JSF JAR(s).
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