在application.yml中

spring:datasource:username: rootpassword:url: jdbc:mysql://127.0.0.1:3306/testdriver-class-name: com.mysql.cj.jdbc.Driver

结果报错

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.

把url改下就行了

url: jdbc:mysql://localhost:3306/testuseUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC