在IDEA连接mysql时，地址，用户名，密码，数据库名，全都配置好了，但是点测试连接，报错：Server returns invalid timezone. Go to 'Advanced' tab and set 'serverTimezon，说明数据库没有设置时区
使用如下方法设置时区
C:\Users\oor>mysql -u root -p
Enter password: ********
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 118
Server version: 5.7.28-log MySQL Community Server (GPL)
Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show variables like'%time_zone';
+------------------+--------+
| Variable_name | Value |
+------------------+--------+
| system_time_zone | |
| time_zone | SYSTEM |
+------------------+--------+
2 rows in set, 1 warning (0.02 sec)
mysql> set global time_zone = '+8:00';
Query OK, 0 rows affected (0.00 sec)
mysql>