springboot项目实现多数据源配置使用dynamic-datasource-spring-boot-starter的操作步骤

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>dynamic-datasource-spring-boot-starter</artifactId>
    <version>2.5.4</version>
</dependency>

dynamic:
  datasource:
    names: primary, secondary
    primary:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3306/db1?useSSL=false&serverTimezone=UTC
      username: root
      password: password1
    secondary:
      driver-class-name: com.mysql.cj.jdbc.Driver
      url: jdbc:mysql://localhost:3306/db2?useSSL=false&serverTimezone=UTC
      username: root
      password: password2

@Configuration
public class DataSourceConfig 
{
    @Autowired
    private DataSourceProperties dataSourceProperties;
    @Bean
    @ConfigurationProperties(prefix = "dynamic.datasource")
    public DataSource dataSource() 
    {
        return DataSourceBuilder.create().build();
    }
    @Bean
    @Primary
    public DataSourceProvider dataSourceProvider()
    {
        DataSourceProperties.DataSourceType defaultDataSourceType = dataSourceProperties.getType();
        Map<String, DataSource> dataSources = new HashMap<>();
        dataSources.put("primary", dataSourceProperties.getPrimary());
        dataSources.put("secondary", dataSourceProperties.getSecondary());
        DynamicDataSourceProvider dynamicDataSourceProvider = new DynamicDataSourceProvider();
        dynamicDataSourceProvider.setDefaultDataSourceType(defaultDataSourceType);
        dynamicDataSourceProvider.setDataSources(dataSources);
        return dynamicDataSourceProvider;
    }
    @Bean
    public DynamicDataSource dynamicDataSource(DataSourceProvider dataSourceProvider)
    {
        DynamicDataSource dynamicDataSource = new DynamicDataSource();
        dynamicDataSource.setDataSourceProvider(dataSourceProvider);
        return dynamicDataSource;
    }
    @Bean
    public DataSourceTransactionManager transactionManager(DynamicDataSource dynamicDataSource)
    {
        return new DataSourceTransactionManager(dynamicDataSource);
    }
    @Bean
    public SqlSessionFactory sqlSessionFactory(DynamicDataSource dynamicDataSource) throws Exception 
    {
        SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
        sessionFactoryBean.setDataSource(dynamicDataSource);
        return sessionFactoryBean.getObject();
    }
}

@Service
public class UserService 
{
    @Autowired
    private UserMapper userMapper;
    @DS("primary")
    public User getPrimaryUserById(Long id) 
    {
        return userMapper.selectById(id);
    }
    @DS("secondary")
    public User getSecondaryUserById(Long id)
    {
        return userMapper.selectById(id);
    }
}