部署JSF webapp会导致java.lang.ClassNotFoundException:javax.servlet.jsp.jstl.core.Config

Question

当我启动JavaServer Faces应用程序时,出现错误.在浏览器上我得到以下错误:

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上发生以下错误:

    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)

这是怎么造成的,我该如何解决？

Answer 1

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.正如包名提示,它是JSTL的一部分.

JSF(更具体地说,Facelets的)确实已经在为JSTL依赖的<c:xxx>标签.当JSF加载时,它也隐式地加载JSTL核心taglib配置.但是,如果找不到,您将获得此异常.

JSTL(和JSF!)通常已经在Java EE容器的框中提供,例如JBoss AS/EAP/WildFly,GlassFish,TomEE,WebLogic等.但是,您使用的是Tomcat,它是一个准系统的JSP/Servlet容器,并且没有随附JSTL.如果升级到例如TomEE不是一个选项,您需要手动提供JSTL以及webapp,就像您为JSF所做的那样.

只需下载jstl-1.2.jar并将其放在/WEB-INF/lib您的webapp的文件夹中,以及JSF JAR(s).

也可以看看:

• 我们的JSTL维基页面

Answer 2

看来你缺少lib。检查JSTL 1.1 - jstl.jar是否添加到您的类路径中。