23:25:35.861 [Druid-ConnectionPool-Create-1886301021] ERROR com.alibaba.druid.pool.DruidDataSource - create connection SQLException, url: jdbc:mysql://localhost:3306/ems_pink?characterEncoding=utf-8, errorCode 0, state 01S00
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:545) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:513) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:505) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:479) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:489) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:69) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1606) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:633) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1510) ~[druid-1.1.6.jar:1.1.6]
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1575) ~[druid-1.1.6.jar:1.1.6]
	at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2450) [druid-1.1.6.jar:1.1.6]
Caused by: com.mysql.cj.core.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 jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?]
	at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:?]
	at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:490) ~[?:?]
	at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:54) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:73) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:118) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.mysqla.MysqlaSession.configureTimezone(MysqlaSession.java:293) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:2399) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:1739) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1596) ~[mysql-connector-java-6.0.6.jar:6.0.6]
	... 6 more

情况2:

Apr 20 23:30:36 CST 2021]; root of context hierarchy
[org.springframework.beans.factory.support.DefaultListableBeanFactory] - Returning cached instance of singleton bean 'empDao'
[org.springframework.jdbc.datasource.DataSourceUtils] - Fetching JDBC Connection from DataSource
[com.alibaba.druid.pool.DruidDataSource] - {dataSource-1} inited
[com.alibaba.druid.pool.DruidDataSource] - create connection SQLException, url: jdbc:mysql://localhost:3306/ems_pink?useSSL=false, errorCode 1045, state 28000
java.sql.SQLException: Access denied for user 'Admin'@'localhost' (using password: YES)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3978)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3914)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:871)
	at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1714)
	at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1224)
	at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2199)
	at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2230)
	at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2025)
	at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:778)
	at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
	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.newInstance(Constructor.java:490)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
	at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)
	at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1657)
	at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1723)
	at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2801)

解决方案:

1.url:&serverTimezone=GMT加上这句话

2.加入这两行

<!--3.配置数据源-->
<bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
    <property name="url" value="${jdbc.url}"/>
    <property name="username" value="${jdbc.username}"/>
    <property name="password" value="${jdbc.password}"/>
    <property name="driverClassName" value="${jdbc.driver}"/>
    <property name="maxActive" value="10"/>
    <property name="minIdle" value="5"/>
</bean>

细粒度配置可参考如下的URL 配置

db mysql

spring.datasource.platform=mysql
db.num=1

db.url.0=jdbc:mysql://localhost:3306/nacos_config?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true&serverTimezone=Asia/Shanghai

db.user=root
db.password=1234

总结：
看了这篇博文挺火，今天做了一下补充，希望对大家有所帮助，有帮助记得点赞➕关注，谢谢~