@Configuration

public class DataSourceConfig {     //数据源设置

    @Bean(name = "primaryDataSource")//primary : 英文“主要的”

    @Qualifier("primaryDataSource")//是一个合格者标识--表明那个类才是我们需要调用的类

    @ConfigurationProperties(prefix="spring.datasource.primary")

    public DataSource primaryDataSource() {

        return DataSourceBuilder.create().build();

    }

    @Bean(name = "secondaryDataSource")//secondary ： 英文“次要的”

    @Qualifier("secondaryDataSource")

    @Primary

    @ConfigurationProperties(prefix="spring.datasource.secondary")

    public DataSource secondaryDataSource() {

        return DataSourceBuilder.create().build();

    }

 }

spring.datasource.primary.url=jdbc:mysql://localhost:3306/test1

spring.datasource.primary.username=root

spring.datasource.primary.password=root

spring.datasource.primary.driver-class-name=com.mysql.jdbc.Driver

spring.datasource.secondary.url=jdbc:mysql://localhost:3306/test2

spring.datasource.secondary.username=root

spring.datasource.secondary.password=root

spring.datasource.secondary.driver-class-name=com.mysql.jdbc.Driver