一、除了MySQL驅(qū)動(dòng)，我們還需要用到postgresql的驅(qū)動(dòng)，所以我們先把驅(qū)動(dòng)的依賴給導(dǎo)入進(jìn)來(lái)

       <!-- PostgreSql驅(qū)動(dòng)包 -->
        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
        </dependency>

二，修改application-druid.yml:

# 數(shù)據(jù)源配置
spring:
    datasource:
        type: com.alibaba.druid.pool.DruidDataSource
        druid:
            # 主庫(kù)數(shù)據(jù)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
            # 從庫(kù)數(shù)據(jù)源
            slave:
                # 從數(shù)據(jù)源開(kāi)關(guān)/默認(rèn)關(guān)閉
                enabled: true
                driverClassName: org.postgresql.Driver
                url: jdbc:postgresql://localhost:5432/easytrack
                username: 123456
                password: 123456

            easytrack:
                # 從數(shù)據(jù)源開(kāi)關(guān)/默認(rèn)關(guān)閉
                enabled: true
                driverClassName: org.postgresql.Driver
                url: jdbc:postgresql://localhost:5432/easytrack
                username: 123456
                password: 123456

三、新數(shù)據(jù)源的配置

（1）修改DatasourceType

package com.ruoyi.common.enums;

/**
 * 數(shù)據(jù)源
 * 
 * @author ruoyi
 */
public enum DataSourceType
{
    /**
     * 主庫(kù)
     */
    MASTER,

    /**
     * 從庫(kù)
     */
    SLAVE,
    /**
     * 新配置數(shù)據(jù)源名稱
     */
    EASYTRACK


}

（2）修改DruidConfig，這里有很多細(xì)節(jié)要注意，就是大小寫(xiě)的問(wèn)題

  @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<Object, Object> 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）使用選擇數(shù)據(jù)源，會(huì)自動(dòng)切換數(shù)據(jù)源

@DataSource(value = DataSourceType.EASYTRACK)

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