提示：Please check the database service to ensure that it is available jdbc:mysql://localhost:3306/finedb?useUnicode=true&characterEncoding=UTF-8

直接启动设计器是没有问题的

Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

19:58:45 Druid-ConnectionPool-Create-1887613730jdbc:mysql://localhost:3306/finedb?useUnicode=true&characterEncoding=UTF-8 ERROR [com.fr.third.alibaba.druid.pool.DruidDataSource] create connection error, url: jdbc:mysql://localhost:3306/finedb?useUnicode=true&characterEncoding=UTF-8, errorCode 0, state 01S00

java.sql.SQLException: The server time zone value 'ÖD1ú±ê׼걼ä' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.

at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:127)