java.lang.ClassNotFoundException:org.apache.myfaces.webapp.StartupServletContextListener [英] java.lang.ClassNotFoundException: org.apache.myfaces.webapp.StartupServletContextListener

问题描述

启动JSF Web应用程序时出现以下异常:

I get the following exception on startup of my JSF web application:

SEVERE: Error configuring application listener of class org.apache.myfaces.webapp.StartupServletContextListener
java.lang.ClassNotFoundException: org.apache.myfaces.webapp.StartupServletContextListener
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3786)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4342)
    at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
    at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
    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:578)
    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)

这是我的web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 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-app_2_5.xsd">
 <display-name>J2S</display-name>
 <context-param>
  <description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
  <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
  <param-value>client</param-value>
 </context-param>
 <context-param>
  <param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
  <param-value>resources.application</param-value>
 </context-param>
 <context-param>
  <param-name>org.apache.myfaces.ALLOW_JAVASCRIPT</param-name>
  <param-value>true</param-value>
 </context-param>
 <context-param>
  <param-name>org.apache.myfaces.AUTO_SCROLL</param-name>
  <param-value>true</param-value>
 </context-param>
 <context-param>
  <param-name>org.apache.myfaces.DETECT_JAVASCRIPT</param-name>
  <param-value>false</param-value>
 </context-param>
 <context-param>
  <param-name>org.apache.myfaces.PRETTY_HTML</param-name>
  <param-value>true</param-value>
 </context-param>
 <listener>
  <listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
</listener>
 <servlet>
  <servlet-name>Faces Servlet</servlet-name>
  <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
  <load-on-startup>1</load-on-startup>
 </servlet>
 <servlet-mapping>
  <servlet-name>Faces Servlet</servlet-name>
  <url-pattern>*.jsf</url-pattern>
 </servlet-mapping>
 <servlet-mapping>
  <servlet-name>Faces Servlet</servlet-name>
  <url-pattern>*.faces</url-pattern>
 </servlet-mapping>
<servlet-mapping>
  <servlet-name>Faces Servlet</servlet-name>
  <url-pattern>/faces/*</url-pattern>
 </servlet-mapping>
 <welcome-file-list>
  welcome-file>index.xhtml</welcome-file>
 </welcome-file-list>
</web-app>

此异常是如何引起的，我该如何解决?

How is this exception caused and how can I solve it?

推荐答案

java.lang.ClassNotFoundException:org.apache.myfaces.webapp.StartupServletContextListener

java.lang.ClassNotFoundException: org.apache.myfaces.webapp.StartupServletContextListener

ClassNotFoundException表示应用程序的运行时类路径中缺少提到的类.提到的类是 MyFaces JSF实现的一部分.你需要 下载 MyFaces Core发行版，解压缩文件并将找到的JAR文件放在/lib文件夹中在您的webapp项目的/WEB-INF/lib文件夹中.请注意，MyFaces随附了三个myfaces-*.jar文件，您应将myfaces-api和myfaces-impl JAR文件中的 和或单独放在myfaces-bundle JAR文件中/WEB-INF/lib.

The ClassNotFoundException means that the mentioned class is missing in the application's runtime classpath. The mentioned class is part of MyFaces JSF implementation. You need to download the MyFaces Core Distribution, unpack the file and put the JAR files found in the /lib folder in the /WEB-INF/lib folder of your webapp project. Note that MyFaces ships with three myfaces-*.jar files, you should put either both the myfaces-api and myfaces-impl JAR files, or alone the myfaces-bundle JAR file in the /WEB-INF/lib.

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