一、除了MySQL驱动，我们还需要用到postgresql的驱动，所以我们先把驱动的依赖给导入进来

org.postgresql

postgresql

二，修改application-druid.yml:

# 数据源配置

spring:

datasource:

type: com.alibaba.druid.pool.DruidDataSource

druid:

# 主库数据源

master:

driverClassName: com.mysql.cj.jdbc.Driver

url: jdbc:mysql://localhost:3306/i_ren_shi?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8

username: root

password: root

# 从库数据源

slave:

# 从数据源开关/默认关闭

enabled: true

driverClassName: org.postgresql.Driver

url: jdbc:postgresql://localhost:5432/easytrack

username: 123456

password: 123456

easytrack:

# 从数据源开关/默认关闭

enabled: true

driverClassName: org.postgresql.Driver

url: jdbc:postgresql://localhost:5432/easytrack

username: 123456

password: 123456

三、新数据源的配置

（1）修改DatasourceType

package com.ruoyi.common.enums;

/**

* 数据源

*

* @author ruoyi

*/

public enum DataSourceType

{

/**

* 主库

*/

MASTER,

/**

* 从库

*/

SLAVE,

/**

* 新配置数据源名称

*/

EASYTRACK

}

（2）修改DruidConfig，这里有很多细节要注意，就是大小写的问题

@Bean

@ConfigurationProperties("spring.datasource.druid.easytrack")

@ConditionalOnProperty(prefix = "spring.datasource.druid.easytrack", name = "enabled", havingValue = "true")

public DataSource easyTrackDataSource(DruidProperties druidProperties)

{

DruidDataSource dataSource = DruidDataSourceBuilder.create().build();

return druidProperties.dataSource(dataSource);

}

@Bean(name = "dynamicDataSource")

@Primary

public DynamicDataSource dataSource(DataSource masterDataSource)

{

Map targetDataSources = new HashMap<>();

targetDataSources.put(DataSourceType.MASTER.name(), masterDataSource);

setDataSource(targetDataSources, DataSourceType.SLAVE.name(), "slaveDataSource");

setDataSource(targetDataSources, DataSourceType.EASYTRACK.name(), "easyTrackDataSource");

return new DynamicDataSource(masterDataSource, targetDataSources);

}

（3）使用选择数据源，会自动切换数据源

@DataSource(value = DataSourceType.EASYTRACK)

查看原文