Caused by: java.lang.ClassCastException: java.math.BigInteger cannot be cast to java.lang.Long
The above error code appears when IDEA runs the project. The reason is that the jar package of mysql-connector-java I used is version 5.1.22, which may be too old.
The solution is to download the newer version and replace it.
Download address: https://dev.mysql.com/downloads/connector/j/
After downloading the 5.1.48 version and replacing it, it runs successfully.
