通常会根据业务接入不同的服务商

以文件上传为例：

代码实现 定义接口，接口方法为基础功能：

public interface IFileService {
    /**
     * 上传
     * @param  file 需要上传的文件
     * @return 上传成功/失败返回 。通常成功返回 可访问url           
     */
    String upload(MultipartFile file);

}

然后根据不同服务商分别实现

上传到本地路径

public class LocalFileServiceImpl implements IFileService {

    String upload(MultipartFile file) {
        //上传到本地路径
        //此处省略业务代码
        return "url";
    }

}

上传到阿里云

public class AliYunFileServiceImpl implements IFileService {

    String upload(MultipartFile file) {
        //上传到阿里云
        //此处省略业务代码
        return "url";
    }

}

上传到minio

public class MinIoFileServiceImpl implements IFileService {

    String upload(MultipartFile file) {
        //上传到minio
        //此处省略业务代码
        return "url";
    }

}

配置实现类

@Configuration
public class FileAutoConfiguration {


    /**
     * 当 config.file.ali-yun.enable = true
     * 并且 Spring 中不包含 IFileService  时生成Bean
     * @return IFileService
     */
    @Bean
    @ConditionalOnProperty(prefix = "config.file.ali-yun", name = "enable")
    @ConditionalOnMissingBean(IFileService.class)
    public IFileService ossFileServiceImpl() {
        return new AliYunFileServiceImpl();
    }

    /**
     * 当 config.file.local.enable = true
     * 并且 Spring 中不包含 IFileService  时生成Bean
     * @return IFileService
     */
    @Bean
    @ConditionalOnProperty(prefix = "config.file.local", name = "enable")
    @ConditionalOnMissingBean(IFileService.class)
    public IFileService localFileServiceImpl() {
        return new LocalFileServiceImpl();
    }

    /**
     * 当 config.file.minio.enable = true
     * 并且 Spring 中不包含 IFileService  时生成Bean
     * @return IFileService
     */
    @Bean
    @ConditionalOnProperty(prefix = "config.file.minio", name = "enable")
    @ConditionalOnMissingBean(IFileService.class)
    public IFileService localFileServiceImpl() {
        return new MinIoFileServiceImpl();
    }


}

yaml

config:
  file:
    ali-yun:
      enable: true
    local:
      enable: false
    minio:
      enable: false

通过以上配置 IFileService 的实现为 AliYunFileServiceImplL

后续如果有新的实现可自行实现 IFileService