There are three days to submit the project, so the project is merged.
The problem has been solved one after another. The first is about hibernate.
This is the background. I have added the hibernate jar package in my project.
My project name ---> right-click and select myeclipse ---> Add hibernate capabilites.
Due to the problem, I deleted the hibernate-related file and jar package hard and hard, but the underlying configuration did not change. So this image is always displayed on my project. Please note the icon below it. It is not configured with hibernate.
Later, I put a classmate who also used the Hibernate frameworkCodeWhen the import comes in, my jar package is deleted, so we have to re-introduce the hibernate package in other projects, using the Add jars method, pointing to a project jar libraries that also uses hibernate, but Tomcat cannot get started...
After two hours, I saw two useful tips. I finally removed Hibernate and planned to re-configure it.
Hibernate capabilities removal method, see the http://blog.csdn.net/robin5475/archive/2008/09/19/2951613.aspx