要实现多数据源的动态添加数据源，实现DynamicDataSourcePropertiesCustomizer 接口即可修改数据源的配置

/**
 * 配置动态数据源
 *
 * @author Stan
 * @date 2022-07-10
 */
@Configuration
@Slf4j
public class DynamicDatasourceConfig implements DynamicDataSourcePropertiesCustomizer {

	
    @Resource
    private UrlResolver urlResolver;

    @Override
    public void customize(DynamicDataSourceProperties dynamicDataSourceProperties) {
        Map<String, DataSourceProperty> datasource = dynamicDataSourceProperties.getDatasource();
        //获取数据库所在的服务器
        String serviceUrl = serviceResolver.resolve("score");
        if (StringUtil.isNotBlank(serviceUrl)) {
            try {
            	//获取服务器地址中的IP地址，既数据库的IP地址
                URI uri = new URI(serviceUrl);
                String host = uri.getHost();
                //成绩数据库
                if (!datasource.containsKey("score")) {
                    DataSourceProperty property = new DataSourceProperty();
                    property.setUrl("jdbc:mysql://" + host + ":3306/score?useUnicode=true&useSSL=false&characterEncoding=utf8&serverTimezone=GMT%2B8");
                    property.setUsername("admin");
                    property.setPassword("XXXXXX");
                    property.setDriverClassName("com.mysql.cj.jdbc.Driver");
                    datasource.put("score", property);
                }
                //成绩历史数据库
                if (!datasource.containsKey("score_history")) {
                    DataSourceProperty property = new DataSourceProperty();
                    property.setUrl("jdbc:mysql://" + host + ":3306/score_his?useUnicode=true&useSSL=false&characterEncoding=utf8&serverTimezone=GMT%2B8");
                    property.setUsername("admin");
                    property.setPassword("XXXXXX");
                    property.setDriverClassName("com.mysql.cj.jdbc.Driver");
                    datasource.put("score_history", property);
                }
            } catch (URISyntaxException exception) {
                log.error("服务器地址获取失败：地址错误：{}", serviceUrl, exception);
            }
        }
    }
}