如何将额外的url添加到主dataSource (复制的保留数据库的url)，以便在运行时动态切换？

@Configuration
public class DataSourceConfig {

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

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

public class DynamicDataSourceContextHolder {
    private static final ThreadLocal<String> contextHolder = new ThreadLocal<>();

    public static void setDataSource(String dataSource) {
        contextHolder.set(dataSource);
    }

    public static String getDataSource() {
        return contextHolder.get();
    }

    public static void clearDataSource() {
        contextHolder.remove();
    }
}

public class DynamicDataSource extends AbstractRoutingDataSource {
    @Override
    protected Object determineCurrentLookupKey() {
        return DynamicDataSourceContextHolder.getDataSource();
    }
}

@Configuration
public class DynamicDataSourceConfig {

    @Autowired
    private DataSource masterDataSource;

    @Autowired
    private DataSource slaveDataSource;

    @Bean
    public DataSource dynamicDataSource() {
        DynamicDataSource dynamicDataSource = new DynamicDataSource();
        Map<Object, Object> dataSourceMap = new HashMap<>();
        dataSourceMap.put("master", masterDataSource);
        dataSourceMap.put("slave", slaveDataSource);
        dynamicDataSource.setTargetDataSources(dataSourceMap);
        dynamicDataSource.setDefaultTargetDataSource(masterDataSource);
        return dynamicDataSource;
    }
}

@Service
public class UserService {

    @Autowired
    private JdbcTemplate jdbcTemplate;

    public List<User> getUsers() {
        DynamicDataSourceContextHolder.setDataSource("slave");
        return jdbcTemplate.query("SELECT * FROM users", new UserRowMapper());
    }
}