application.yml

spring:
  # 数据源相关配置
  datasource:
    dynamic:
      # 主数据源
      primary: master
      datasource:
        # 数据源1
        master:
          url: jdbc:oracle:thin:@localhost:1521:ORCL
          type: com.alibaba.druid.pool.DruidDataSource
          driver-class-name: oracle.jdbc.OracleDriver
          username: ***
          password: ***
        # 数据源2
        db2:
          url: jdbc:oracle:thin:@localhost:1521:ORCL
          type: com.alibaba.druid.pool.DruidDataSource
          driver-class-name: oracle.jdbc.OracleDriver
          username: ***
          password: ***
      # druid 全局配置
      druid:
        initial-size: 5
        min-idle: 5
        max-active: 20
        max-wait: 60000
        time-between-eviction-runs-millis: 60000
        min-evictable-idle-time-millis: 30000
        validation-query: SELECT 1 FROM DUAL
        test-while-idle: true
        test-on-borrow: true
        test-on-return: false

mybatis-plus:
  # mapper文件路径
  mapper-locations: classpath:mapper/*/*.xml
#  # SQL日志输出
#  configuration:
#    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

启动类

DruidDataSourceAutoConfigure会注入一个DataSourceWrapper，其会在原生的spring.datasource下找url,username,password。而我们动态数据源的配置路径是变化的需要先排除

@SpringBootApplication(exclude = DruidDataSourceAutoConfigure.class)
public class MonitorApplication {

    public static void main(String[] args) {
        SpringApplication.run(MonitorApplication.class, args);
    }

}

@Service
@DS("quartz")
public class TestServiceImpl {






}

默认为主数据源，加注解可以指定到第二数据源。
可以加在服务层和mapper接口上。
最好不要同时加。