刚学习JSF,出现java.lang.ClassNotFoundException的异常

Question

 

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>0</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>*.faces</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

 而且lib 也导入这些依赖包

但项目运行的时候都会出现下面的异常，包括复制别人的项目

 

异常如下：
java.lang.ClassNotFoundException: javax.faces.webapp.FacesServlet

  at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1701)

at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1546)

at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:525)

at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:507)

at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:124)

at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1136)

at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1080)

at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5015)

at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5302)

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)

at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:897)

at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:873)

at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)

at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1095)

at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1617)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)

at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)

at java.util.concurrent.FutureTask.run(FutureTask.java:138)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)

at java.lang.Thread.run(Thread.java:619)

 

Answer 1

检查一下你的jsf-api.jar有没有在服务器的classpath里，你的截图是IDE里的classpath，作不得准。