解决driverClassName: com.mysql.cj.jdbc.Driver报红问题

为将项目从postgre库转为本地mysql数据库，需要将数据库驱动改为mysql

1.在父工程的pom中引入数据库

         <!-- Mysql驱动包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.28</version>
        </dependency>

2.在配置文件中application.yml中写引入的主数据库驱动和连接信息

  datasource:
    hikari:
      auto-commit: false
    type: com.alibaba.druid.pool.DruidDataSource
#    driverClassName: org.postgresql.Driver
    driverClassName: com.mysql.cj.jdbc.Driver
    druid:
      # 主库数据源
      master:
        url: jdbc:mysql://localhost:3306/mydb?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8
        username: root
        password: 'root'

发现引入的驱动名报红，我的解决方式是

3.找到仓库中mysql的jar，删除，再重新maven Reload project