解決Hibernate報錯The server time zone value is unrecognized or represents more than one time zone

??筆者在使用Hibernate做代碼重構的時候，運行時一直報同一個錯誤。當時筆者的運行環境如下：

筆者報錯時的運行環境：
JDK 13.0.2
MySQL 8.0.21
Hibernate 5.4.25 Final Release
IntelliJ IDEA 2020.1.2 (Ultimate Edition)

??這個報錯的信息如下：（這個報錯信息居然還有亂碼）

ERROR: The server time zone value '���??��' 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. Exception in thread "main" org.hibernate.service.spi.ServiceException: Unable to create requested service [org.hibernate.engine.jdbc.env.spi.JdbcEnvironment]at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:275)at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:237)at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214)at org.hibernate.id.factory.internal.DefaultIdentifierGeneratorFactory.injectServices(DefaultIdentifierGeneratorFactory.java:152)at org.hibernate.service.internal.AbstractServiceRegistryImpl.injectDependencies(AbstractServiceRegistryImpl.java:286)at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:243)at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214)at org.hibernate.boot.internal.InFlightMetadataCollectorImpl.<init>(InFlightMetadataCollectorImpl.java:176)at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.complete(MetadataBuildingProcess.java:127)at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.build(MetadataBuildingProcess.java:86)at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:473)at org.hibernate.boot.internal.MetadataBuilderImpl.build(MetadataBuilderImpl.java:84)at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:689)at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:724)at lee.NewsManager.main(NewsManager.java:30) Caused by: org.hibernate.exception.GenericJDBCException: Error calling Driver#connectat org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47)at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113)at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.convertSqlException(BasicConnectionCreator.java:118)at org.hibernate.engine.jdbc.connections.internal.DriverConnectionCreator.makeConnection(DriverConnectionCreator.java:41)at org.hibernate.engine.jdbc.connections.internal.BasicConnectionCreator.createConnection(BasicConnectionCreator.java:58)at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections.addConnections(DriverManagerConnectionProviderImpl.java:341)at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections.<init>(DriverManagerConnectionProviderImpl.java:260)at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections.<init>(DriverManagerConnectionProviderImpl.java:238)at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl$PooledConnections$Builder.build(DriverManagerConnectionProviderImpl.java:379)at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.buildPool(DriverManagerConnectionProviderImpl.java:98)at org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl.configure(DriverManagerConnectionProviderImpl.java:73)at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:107)at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:246)at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:214)at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.buildJdbcConnectionAccess(JdbcEnvironmentInitiator.java:145)at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:66)at org.hibernate.engine.jdbc.env.internal.JdbcEnvironmentInitiator.initiateService(JdbcEnvironmentInitiator.java:35)at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.initiateService(StandardServiceRegistryImpl.java:101)at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:263)... 14 more Caused by: java.sql.SQLException: The server time zone value '���??��' 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 org.hibernate.engine.jdbc.connections.internal.DriverConnectionCreator.makeConnection(DriverConnectionCreator.java:38)... 29 more Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value '���??��' 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 java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:85)at com.mysql.cj.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:132)at com.mysql.cj.protocol.a.NativeProtocol.configureTimezone(NativeProtocol.java:2120)at com.mysql.cj.protocol.a.NativeProtocol.initServerSession(NativeProtocol.java:2143)at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1310)at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:967)at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:826)... 33 more

??這是因為自MySQL 6.0之后，connection.url對應的內容必須加上serverTimezone參數（比如serverTimezone=UTC）。筆者原來的配置片段如下：

<property name="connection.url">jdbc:mysql://localhost/hibernate?useSSL=true</property>

??而自MySQL 6.0之后，這要改成：

<property name="connection.url">jdbc:mysql://localhost/hibernate?useSSL=true&amp;serverTimezone=UTC</property> 超強干貨來襲 云風專訪：近40年碼齡，通宵達旦的技術人生

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