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

Question

当我启动 JavaServer Faces 应用程序时出现错误。在浏览器上出现以下错误：

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 中出现以下错误：

    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)

这是怎么引起的，我该如何解决？

Answer 1

java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config

ClassNotFoundException 表示运行时类路径中缺少指定的类。正如包名所暗示的，它是JSTL 的一部分。

JSF（更具体地说，Facelets）确实依赖于the <c:xxx> tags 的JSTL。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，您将得到这个异常。

JSTL（和 JSF！）通常已经在 J​​Boss AS/EAP/WildFly、GlassFish、TomEE、WebLogic 等 Java EE 容器上开箱即用。但是，您使用的是 Tomcat，它是一个准系统 JSP/Servlet 容器，不附带 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 并将其与 JSF JAR 一起放入您的 web 应用程序的 /WEB-INF/lib 文件夹中。

另见：

• Our JSTL wiki page

Answer 2

您似乎缺少 lib。 检查是否在您的类路径中添加了 JSTL 1.1 - jstl.jar。

Answer 3

在 pom.xml 中添加 jstl maven 依赖：

         <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>