java组织。springframework。网状物servlet。DispatcherServlet在尝试使用Spring框架时

3 月，2 周 Questions & Answers 569

我正试着按照这本指南学习春天http://docs.spring.io/docs/Spring-MVC-step-by-step/part1.html 我正在使用Eclipse和Tomcat。我试图在lib文件夹和java构建路径（eclipse的函数）中添加springjar。我试着加上弹簧。jar，spring webmvc。jar和commons日志记录。jar遵循指南。我甚至尝试添加Spring framework 3.1、3.2和4.1中的所有jar。但当我启动Tomcat时，我总是会犯同样的错误

java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1714)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1559)
    at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:527)
    at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:509)
    at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:137)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1144)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1088)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5176)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5460)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

这是我的网站。xml

    <?xml version="1.0" encoding="UTF-8"?>

    <web-app version="2.4"
             xmlns="http://java.sun.com/xml/ns/j2ee"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
             http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" >

      <servlet>
        <servlet-name>springapp</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
      </servlet>

      <servlet-mapping>
        <servlet-name>springapp</servlet-name>
        <url-pattern>*.htm</url-pattern>
      </servlet-mapping>

      <welcome-file-list>
        <welcome-file>
          index.jsp
        </welcome-file>
      </welcome-file-list>

</web-app>

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java组织。springframework。网状物servlet。DispatcherServlet在尝试使用Spring框架时

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