如何在SpringBoot中为不同的DataSources配置JPA仓库？

# 第一个数据源
spring.datasource.url=jdbc:mysql://localhost:3306/db1
spring.datasource.username=user1
spring.datasource.password=password1
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

# 第二个数据源
spring.datasource.secondary.url=jdbc:mysql://localhost:3306/db2
spring.datasource.secondary.username=user2
spring.datasource.secondary.password=password2
spring.datasource.secondary.driver-class-name=com.mysql.jdbc.Driver

@Configuration
@EnableJpaRepositories(basePackages = "com.example.repository", entityManagerFactoryRef = "entityManagerFactory", transactionManagerRef = "transactionManager")
public class DataSourceConfig {

    @Primary
    @Bean(name = "dataSource")
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource dataSource() {
        return DataSourceBuilder.create().build();
    }

    @Primary
    @Bean(name = "entityManagerFactory")
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(EntityManagerFactoryBuilder builder, @Qualifier("dataSource") DataSource dataSource) {
        return builder.dataSource(dataSource).packages("com.example.entity").build();
    }

    @Primary
    @Bean(name = "transactionManager")
    public PlatformTransactionManager transactionManager(@Qualifier("entityManagerFactory") EntityManagerFactory entityManagerFactory) {
        return new JpaTransactionManager(entityManagerFactory);
    }
}

@Configuration
@EnableJpaRepositories(basePackages = "com.example.secondary.repository", entityManagerFactoryRef = "secondaryEntityManagerFactory", transactionManagerRef = "secondaryTransactionManager")
public class SecondaryDataSourceConfig {

    @Bean(name = "secondaryDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.secondary")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "secondaryEntityManagerFactory")
    public LocalContainerEntityManagerFactoryBean secondaryEntityManagerFactory(EntityManagerFactoryBuilder builder, @Qualifier("secondaryDataSource") DataSource secondaryDataSource) {
        return builder.dataSource(secondaryDataSource).packages("com.example.secondary.entity").build();
    }

    @Bean(name = "secondaryTransactionManager")
    public PlatformTransactionManager secondaryTransactionManager(@Qualifier("secondaryEntityManagerFactory") EntityManagerFactory secondaryEntityManagerFactory) {
        return new JpaTransactionManager(secondaryEntityManagerFactory);
    }
}

@SpringBootApplication
@Import({DataSourceConfig.class, SecondaryDataSourceConfig.class})
public class Application {

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