SpringBoot使用jdbc数据访问时遇到的问题
首先我们访问mysql数据库时需要导入的模块为
<!--导入jdbc模块-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<!--导入mysql驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
然后编写配置文件，SpringBoot的配置文件（application.properties与application.yml）；
application.properties的配置：
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/jdbc
spring.datasource.username=root
spring.datasource.password=123
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
运行项目时出现了错误，以下是截取部分错误：
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.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_151]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_151]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_151]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_151]
缘由：MySQL JDBC驱动程序的5.1.33版本与UTC时区配合使用，必须在连接字符串中明确指定server time zone。
解决方案：
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/jdbc?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=123
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
然后我把相同的配置放在application.yml配置文件中，又出现了错误。。。
application.yml的配置：
spring:
datasource:
name: root
password: 123
url: jdbc:mysql://127.0.0.1:3306/jdbc?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
driver-class-name: com.mysql.jdbc.Driver
错误信息是：
java.sql.SQLException: Access denied for user ''@'localhost' (using password: YES)
为啥这两个配置文件的产生的效果这么大？？
望路过的大佬们给小白多多指点（os：现在项目就只有application.properties配置）