SpringBoot+MyBatis基于mysql-8.0.11（最新版）的连接测试

1.项目依赖：

<!-- 数据源 -->
  <dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>druid</artifactId>
   <version>1.1.0</version>
  </dependency>

  <!-- mysql -->
  <dependency>
   <groupId>mysql</groupId>
   <artifactId>mysql-connector-java</artifactId>
   <version>8.0.11</version>
  </dependency>
  
  <!--mybatis-->
  <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>1.3.1</version>
  </dependency>

2.配置数据源相关，使用阿里巴巴Druid数据源

### MySQL Connector/J 5.x   (旧版连接)
#spring.datasource.url=jdbc:mysql://127.0.0.1:3306/rwa?useUnicode=true&characterEncoding=utf8
### MySQL Connector/J 6.x之后   (新版连接)
spring.datasource.url=jdbc:mysql:///rwa?serverTimezone=UTC&characterEncoding=utf8&useUnicode=true&useSSL=false
#说明： 新版驱动url默认地址为127.0.0.1:3306，所以访问本机mysql数据库地址可以用 /// 表示
#spring.datasource.url=jdbc:mysql://localhost:3306/rwa?serverTimezone=UTC&characterEncoding=utf8&useUnicode=true&useSSL=false
spring.datasource.username=root
spring.datasource.password=qzw123
#spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.druid.initial-size=1
spring.datasource.druid.min-idle=1
spring.datasource.druid.max-active=20
spring.datasource.druid.test-on-borrow=true
spring.datasource.druid.stat-view-servlet.allow=true

注意：新版mysql驱动的url必须设置时区，即serverTimezone=UTC，否则会报如下错误：

java.sql.SQLException: The server time zone value 'Öйú±ê׼ʱ¼ä' 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:127) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:95) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:87) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:61) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:71) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:76) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:862) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:444) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:230) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:226) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:148) ~[druid-1.1.0.jar:1.1.0]
 at com.alibaba.druid.filter.stat.StatFilter.connection_connect(StatFilter.java:217) ~[druid-1.1.0.jar:1.1.0]
 at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:142) ~[druid-1.1.0.jar:1.1.0]
 at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1466) ~[druid-1.1.0.jar:1.1.0]
 at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1529) ~[druid-1.1.0.jar:1.1.0]
 at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2178) ~[druid-1.1.0.jar:1.1.0]
Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value 'Öйú±ê׼ʱ¼ä' 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.GeneratedConstructorAccessor85.newInstance(Unknown Source) ~[na:na]
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_91]
 at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_91]
 at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:59) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:83) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:128) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.protocol.a.NativeProtocol.configureTimezone(NativeProtocol.java:2201) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.protocol.a.NativeProtocol.initServerSession(NativeProtocol.java:2225) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1391) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:993) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:852) ~[mysql-connector-java-8.0.11.jar:8.0.11]
 ... 9 common frames omitted

加上时区参数serverTimezone=UTC

项目正常启动！