Unable to connect MySQL server at localhost 3306 using netbeans 11.3

Question

In the Maven project. When I first set up XAMPP and MySQL work very well. But inside NetBeans I can't connect to the MySQL and can't create a connect to the mysql-connector-java-8.0.20.zip or mysql-connector-java-8.0.20.jar . driver="com.mysql.cj.jdbc.Driver" and url="jdbc:mysql://localhost:3306/mysql"

When I going to add new connection to MySQL it display error message,

Cannot establish a connection to jdbc:mysql://localhost:3306/mysql using com.mysql.cj.jdbc.Driver (The server time zone value 'unknown' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver

Answer 1

"The server time zone value 'unknown' is unrecognized or represents more than one-time zone" This is a common error in MySQL to fix this error.
1)Create a new connection to MySQL
2)Connect JDBC driver to using mysql-connector-java-8.0.20.jar
3)In JDBC URL add server time zone as follows make sure your database name is mysql otherwise change the database name to your database name.
jdbc:mysql://localhost:3306/mysql?serverTimezone=UTC
NB:- If you want you can add server time zone as a connection property set property as serverTimezone and value as UTC.

If this didn't work use MariaDb driver to connect MySQL
1)Create a new connection
2)Add mariadb-java-client-2.6.0 to the connection
3)In JDBC URL add as follows and you don't want to worry about server time zone when you use MariaDB
jdbc:mariadb://localhost:3306/mysql

Answer 2

It looks like you're running on windows but the solution for me involved customizing the mysql driver. On the netbeans services tab open the drivers folder right-click the mysql connector/driver and then cutomize. Locate your driver on your system and add it to the class then click ok. Worked for me on ubuntu