pom.xml

<dependency>
	<groupId>com.alibaba</groupId>
	<artifactId>druid-spring-boot-3-starter</artifactId>
	<version>1.2.25</version>
</dependency>

application.yml

spring:
  datasource:
    dynamic:
      primary: master
      strict: false
      datasource:
        master:
          driver-class-name: org.postgresql.Driver
          url: jdbc:postgresql://localhost:5432/postgres?socketTimeout=5
          username: postgres
          password: postgres
          druid:                  #这里为每个数据源单独配置
            initial-size: 5
            max-active: 20
        slave_1:
          driver-class-name: org.postgresql.Driver
          url: jdbc:postgresql://localhost:5432/postgres
          username: postgres
          password: postgres
    druid:                        #这里开启可视化控制台页面
      stat-view-servlet:
        enabled: true

参考：
[1]: Spring Boot整合Druid：轻松实现SQL监控和数据库密码加密
[2]: Druid配置详解，新手必须读
[3]: SpringBoot【十一】mybatis-plus实现多数据源配置，开箱即用！
[4]: mvnrepository