参考*：https://*.com/questions/11227395/java-lang-classnotfoundexception-org-springframework-web-servlet-dispatcherserv

eclipse中：

• right click on your project and choose properties.
• click on Deployment Assembly.
• click add
• click on "Java Build Path Entries"
• select Maven Dependencies"
• click Finish.

idea中：

In idea Intellij you need to go to File -> Project Settings -> Artifacts. Then