我的mysql版本是8.0.17
Exception in thread "main" java.sql.SQLException: The server time zone value '�й���ʱ��' 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:129)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:76)
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836)
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:197)
at com.mysql.cj.jdbc.MysqlDataSource.getConnection(MysqlDataSource.java:416)
at com.mysql.cj.jdbc.MysqlDataSource.getConnection(MysqlDataSource.java:128)
at com.mysql.cj.jdbc.MysqlDataSource.getConnection(MysqlDataSource.java:113)
at test.jar_test.main(jar_test.java:51)
解决办法：连接数据库时：
((MysqlDataSource) dataSource).setURL("jdbc:mysql://127.0.0.1:3306/mysql1?characterEncoding=utf-8&useSSL=true");
修改为：
((MysqlDataSource) dataSource).setURL("jdbc:mysql://127.0.0.1:3306/mysql1?serverTimezone=UTC&useSSL=true");