切换Druid数据库连接池

<!-- druid-->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.2.20</version>
</dependency>
<!-- 上面没用就试下下面这个依赖 -->
 <dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-3-starter</artifactId>
    <version>1.2.20</version>
</dependency>

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/数据库名称
    username: root
    password: 123456