1、需要的依赖，版本自行控制

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid</artifactId>
</dependency>

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
</dependency>

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>dynamic-datasource-spring-boot-starter</artifactId>
</dependency>

2、配置文件

spring:
  datasource:
    dynamic:
      primary: master
      strict: false
      datasource:
        master:
          url: jdbc:mysql://xxx?useSSL=false&useUnicode=true&characterEncoding=utf8
          username: root
          password: pas
          driver-class-name: com.mysql.cj.jdbc.Driver
        two:
          url: jdbc:mysql://xxx?useSSL=false&useUnicode=true&characterEncoding=utf8
          username: root
          password: pas
          driver-class-name: com.mysql.cj.jdbc.Driver

3、使用方法，添加DS注解，值为配置的数据源名称

4、直接使用