Spring is configured in Eclipse, prompting for Java.lang.ClassNotFoundException:org.springframework.web.servlet.Dispatcher error

In Eclipse, a dynamic project was created, using spring, always prompting Java.lang.ClassNotFoundException: Org.springframework.web.servlet.Dispatcher Error,

And then prompted Java.lang.noclassdeffounderror:org/springframework/context/applicationconte

Later a new project, and then the structure of what has not changed can be normal operation;

In contrast, there are several possible reasons for this:

1.lib package is not under the Web-inf file, (this time to get rid of the bug)

The same jar appears under the 2.classes folder

Spring is configured in Eclipse, prompting for Java.lang.ClassNotFoundException:org.springframework.web.servlet.Dispatcher error