解决web应用程序[]中的Servlet[dispatcherServlet]引发了load（）异常

解决web应用程序[]中的Servlet[dispatcherServlet]引发了load（）异常

今天在学习springMVC入门程序的时候，遇到了如下问题：

```java
24-Nov-2021 11:57:27.506 信息 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.ApplicationContext.log 将servlet[dispatcherServlet]标记为不可用
24-Nov-2021 11:57:27.506 严重 [RMI TCP Connection(3)-127.0.0.1] org.apache.catalina.core.StandardContext.loadonStartup web应用程序[]中的Servlet[dispatcherServlet]引发了load（）异常
	java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
		at org.apache.catalina.loader.WebappClassLoaderbase.loadClass(WebappClassLoaderbase.java:1407)
		at org.apache.catalina.loader.WebappClassLoaderbase.loadClass(WebappClassLoaderbase.java:1215)
		at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:538)
		at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:519)
		at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:149)
		at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1070)
		at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1010)
		at org.apache.catalina.core.StandardContext.loadonStartup(StandardContext.java:4957)
		at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5264)
		at org.apache.catalina.util.Lifecyclebase.start(Lifecyclebase.java:183)
		at org.apache.catalina.core.Containerbase.addChildInternal(Containerbase.java:726)
		at org.apache.catalina.core.Containerbase.addChild(Containerbase.java:698)
		at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:696)
		at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1783)
		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
		at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
		at java.lang.reflect.Method.invoke(Method.java:498)
		at org.apache.tomcat.util.modeler.baseModelMBean.invoke(baseModelMBean.java:293)
		at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
		at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
		at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:460)
		at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:408)
		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
		at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
		at java.lang.reflect.Method.invoke(Method.java:498)
		at org.apache.tomcat.util.modeler.baseModelMBean.invoke(baseModelMBean.java:293)
		at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
		at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
		at com.sun.jmx.remote.security.MBeanServerAccessController.invoke(MBeanServerAccessController.java:468)
		at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)
		at javax.management.remote.rmi.RMIConnectionImpl.access0(RMIConnectionImpl.java:76)
		at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309)
		at java.security.AccessController.doPrivileged(Native Method)
		at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1408)
		at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)
		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
		at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
		at java.lang.reflect.Method.invoke(Method.java:498)
		at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:357)
		at sun.rmi.transport.Transport.run(Transport.java:200)
		at sun.rmi.transport.Transport.run(Transport.java:197)
		at java.security.AccessController.doPrivileged(Native Method)
		at sun.rmi.transport.Transport.serviceCall(Transport.java:196)
		at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:573)
		at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:834)
		at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$runorg.springframework(TCPTransport.java:688)
		at java.security.AccessController.doPrivileged(Native Method)
		at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687)
		at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
		at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
		at java.lang.Thread.run(Thread.java:748)

maven依赖：

```java
 
    
        5.0.2.RELEASE
    

    
        
            ${spring.version}
            spring-webmvc
            javax.servlet
        

        
            2.5
            servlet-api
            provided
            javax.servlet.jsp
        

        
            2.0
            jsp-api
            provided
            org.projectlombok
        

        
            1.18.12
            lombok
            
        
    

web.xml

 
        dispatcherServlet
        org.springframework.web.servlet.DispatcherServlet
            
                contextConfigLocation
                classpath:spring.xml
            

        1
    
    
        dispatcherServlet
        /
    

spring.xml

  
    
    
        
        
@Controller //对Controller进行IOC
public class HelloController {

    @RequestMapping("/hello/sayHello") //映射路径
    public String SayHello(){
        System.out.println("hello world...");
        //跳转到成功页面
        return "success";
    }
}


    

HelloController

success.jsp

    
访问成功！

按理说正常启动服务器，应该在控制台打印一句话，然后跳转到成功页面，但是启动后报了文章开头那个错，搞的我有点懵逼……
于是乎搜索+尝试，发现这是由于jar路径不对引起的问题

然后…
点击Project Structure

点击Artifacts，如图所示，将lib拖到WEB-INF里，最后点Apply OK重启服务器即可如果没有点开发现没有lib，那就按照以下步骤创建一个：
这里的lib还是个空文件夹，我们需要导包：CTRL+A全选 然后全部点击ok

经过以上 *** 作，终于达成了理想中的效果，尼玛……