Spring Boot使用多个数据源时如何设置多个连接池

Spring Boot使用多个数据源时如何设置多个连接池？

# primary数据源配置
spring.datasource.primary.url=jdbc:mysql://localhost:3306/primary_db
spring.datasource.primary.username=root
spring.datasource.primary.password=root
spring.datasource.primary.driver-class-name=com.mysql.jdbc.Driver
# secondary数据源配置
spring.datasource.secondary.url=jdbc:mysql://localhost:3306/secondary_db
spring.datasource.secondary.username=root
spring.datasource.secondary.password=root
spring.datasource.secondary.driver-class-name=com.mysql.jdbc.Driver

yaml
# primary数据源配置
spring:
  datasource:
    primary:
      url: jdbc:mysql://localhost:3306/primary_db
      username: root
      password: root
      driver-class-name: com.mysql.jdbc.Driver
# secondary数据源配置
spring:
  datasource:
    secondary:
      url: jdbc:mysql://localhost:3306/secondary_db
      username: root
      password: root
      driver-class-name: com.mysql.jdbc.Driver

java
@Configuration
public class DataSourceConfig {
    // primary数据源配置
    @Primary
    @Bean(name = "primaryDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.primary")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }
    // secondary数据源配置
    @Bean(name = "secondaryDataSource")
    @ConfigurationProperties(prefix = "spring.datasource.secondary")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }
    // primary连接池配置
    @Primary
    @Bean(name = "primaryDataSourcePool")
    public DataSourcePoolProperties primaryDataSourcePool() {
        DataSourcePoolProperties properties = new DataSourcePoolProperties();
        // 设置连接池属性
        // ...
        return properties;
    }
    // secondary连接池配置
    @Bean(name = "secondaryDataSourcePool")
    public DataSourcePoolProperties secondaryDataSourcePool() {
        DataSourcePoolProperties properties = new DataSourcePoolProperties();
        // 设置连接池属性
        // ...
        return properties;
    }
}

java
@Service
public class UserService {
    @Autowired
    @Qualifier("primaryDataSource")
    private DataSource primaryDataSource;
    @Autowired
    @Qualifier("secondaryDataSource")
    private DataSource secondaryDataSource;
    @Autowired
    @Qualifier("primaryDataSourcePool")
    private DataSourcePoolProperties primaryDataSourcePool;
    @Autowired
    @Qualifier("secondaryDataSourcePool")
    private DataSourcePoolProperties secondaryDataSourcePool;
    // ...
}