InvalidConnectionAttributeException: The server time zone value unrecognized or represents more

mysql 8.0 版本需要设置时区

问题

com.mysql.cj.exceptions.InvalidConnectionAttributeException: 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 sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_231]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_231]
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_231]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_231]
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.20.jar:8.0.20]
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:85) ~[mysql-connector-java-8.0.20.jar:8.0.20]
	at com.mysql.cj.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:132) ~[mysql-connector-java-8.0.20.jar:8.0.20]
	at com.mysql.cj.protocol.a.NativeProtocol.configureTimezone(NativeProtocol.java:2120) ~[mysql-connector-java-8.0.20.jar:8.0.20]
	at com.mysql.cj.protocol.a.NativeProtocol.initServerSession(NativeProtocol.java:2143) ~[mysql-connector-java-8.0.20.jar:8.0.20]
	at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1310) ~[mysql-connector-java-8.0.20.jar:8.0.20]
	at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:967) ~[mysql-connector-java-8.0.20.jar:8.0.20]
	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826) ~[mysql-connector-java-8.0.20.jar:8.0.20]
	at com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:456) ~[mysql-connector-java-8.0.20.jar:8.0.20]
	at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246) ~[mysql-connector-java-8.0.20.jar:8.0.20]
	at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:197) ~[mysql-connector-java-8.0.20.jar:8.0.20]
	at org.apache.commons.dbcp2.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:39) ~[commons-dbcp2-2.1.1.jar:2.1.1]
	at org.apache.commons.dbcp2.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:256) ~[commons-dbcp2-2.1.1.jar:2.1.1]
	at org.apache.commons.dbcp2.BasicDataSource.validateConnectionFactory(BasicDataSource.java:2304) ~[commons-dbcp2-2.1.1.jar:2.1.1]
	at org.apache.commons.dbcp2.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:2290) ~[commons-dbcp2-2.1.1.jar:2.1.1]
	at org.apache.commons.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:2039) ~[commons-dbcp2-2.1.1.jar:2.1.1]
	at org.apache.commons.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1533) ~[commons-dbcp2-2.1.1.jar:2.1.1]
	at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:158) ~[spring-jdbc-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:116) ~[spring-jdbc-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79) ~[spring-jdbc-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:612) ~[spring-jdbc-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:669) ~[spring-jdbc-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:694) ~[spring-jdbc-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:748) ~[spring-jdbc-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate.query(NamedParameterJdbcTemplate.java:216) ~[spring-jdbc-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at com.example.demo.storage.impl.UserStorageImpl.getByIds(UserStorageImpl.java:86) ~[classes/:na]
	at com.example.demo.storage.impl.UserStorageImpl$$FastClassBySpringCGLIB$$9996508f.invoke() ~[classes/:na]
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:771) ~[spring-aop-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749) ~[spring-aop-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749) ~[spring-aop-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:691) ~[spring-aop-5.2.6.RELEASE.jar:5.2.6.RELEASE]
	at com.example.demo.storage.impl.UserStorageImpl$$EnhancerBySpringCGLIB$$d22791b5.getByIds() ~[classes/:na]

解决办法

spring.datasource.url=jdbc:mysql://localhost:3306/demo
改为
spring.datasource.url=jdbc:mysql://localhost:3306/demo?serverTimezone=UTC