It does not match the version from the mysql database driver jar package version to the entire development process of environmental change again

I installed the jdk version 1.7, mysql version 8.0, version 5.1 driver jar package, causing the program Rom mysql database.

The first step will become a replacement driver jar version 8.0, running discovery or error, I checked and found to be the cause mismatch problems jdk1.7 version of the database

The second step will be replaced jdk 1.8 version, I do not know how to engage the eclipse out waste, and then reinstall eclpise, reconfigure the tomcat deployment project, and finally get

Experience: novice when doing the project must pay attention to the various versions of the tool matches the environment, or a variety of error will be very pit