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.
解決方法：
在url后邊加上 serverTimezone=UTC
url=jdbc:mysql://localhost:3306/transaction?serverTimezone=UTC
