org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.)
I did it before I changed it to localhost
Now the server is not a server with the database
Can only be connected with a domain name
The result appears again
mysqlThe default is only local connection, and the configuration file needs to be changed.