springmvc报错 org.springframework.web.servlet.DispatcherServlet

拼搏现实的明天。 2022-05-20 03:04 116阅读 0赞

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在写springMVC时，导入所有需要的包后，运行程序，控制台报以下错误：

![复制代码][copycode.gif]

严重: Servlet [springDispatcherServlet] in web application [/SpringMVC-1] threw load() exception
    java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1333)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167)
    at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:518)
    at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:499)
    at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1091)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1027)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5038)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5348)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
    at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:587)
    at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1798)
    at java.util.concurrent.Executors$RunnableAdapter.call(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)

![复制代码][copycode.gif]

随便在一个java文件中都无法import org.springframework.web.servlet.DispatcherServlet，这个类主要是在spring-webmvc jar包下，所有导入的jar包如下：

![983499-20160923023035481-705323.png][]

都已经导入，没有问题。但是实际上还要把依赖都加进classpath下。步骤：

项目右击-->properties-->Deployment Assembly-->add-->Java Build Path Entries-->导入所有依赖的Jar包，重新start tomcat即可。

[copycode.gif]: /images/20220520/3efbf08b82ee41fd9e57a4c4beab9f5c.png
[983499-20160923023035481-705323.png]: /images/20220520/69a7c69192194477bc46b9df07751163.png