1、在pom文件中添加依赖

<dependencies>
  <!-- 七牛云SDK -->
  <dependency>
    <groupId>com.qiniu</groupId>
    <artifactId>qiniu-java-sdk</artifactId>
    <version>[7.13.0, 7.13.99]</version>
  </dependency>
  <!-- Lombok -->
  <dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>1.18.30</version>
    <optional>true</optional>
  </dependency>
</dependencies>

2、在配置文件中添加SSO信息

# 七牛云
qiniu:
  oss:
    access-key: *** # 请从七牛云工作台-个人中心-密钥管理获取
    secret-key: *** # 请从七牛云工作台-个人中心-密钥管理获取
    bucket: demo # 七牛云存储空间名称
    directory: upload/ # 自定义存储空间内目录
    domain: https://qiniu.demo.com/ # 存储空间自定义域名，请提前在存储空间中进行配置

3、创建七牛云配置类

/**
 * 七牛云OSS相关配置
 */
@Configuration
@ConfigurationProperties(prefix = "qiniu.oss")
@Getter
@Setter
public class QiniuConfig {
    /**
     * AC
     */
    private String accessKey;
    /**
     * SC
     */
    private String secretKey;
    /**
     * 存储空间
     */
    private String bucket;
    /**
     * 上传目录
     */
    private String directory;
    /**
     * 访问域名
     */
    private String domain;
}

4、创建文件操作服务类

import com.qiniu.storage.UploadManager;
import com.qiniu.util.Auth;
import com.ruoyi.file.config.QiniuConfig;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import com.qiniu.storage.Region;
import java.io.IOException;
import java.util.UUID;

import com.qiniu.storage.Configuration;

/**
 * 七牛云对象存储文件服务
 */
@Service("qiniuFileService")
public class QiniuFileServiceImpl {
    private final QiniuConfig qiniuConfig;

    public QiniuFileServiceImpl(QiniuConfig qiniuConfig) {
        this.qiniuConfig = qiniuConfig;
    }

 
    public String upload(MultipartFile file) throws IOException {
        if (file.isEmpty()) {
            throw new RuntimeException("文件是空的");
        }
        // 创建上传token
        Auth auth = Auth.create(qiniuConfig.getAccessKey(), qiniuConfig.getSecretKey());
        String upToken = auth.uploadToken(qiniuConfig.getBucket());

        // 设置上传配置，Region要与存储空间所属的存储区域保持一致
        Configuration cfg = new Configuration(Region.huadongZheJiang2());

        // 创建上传管理器
        UploadManager uploadManager = new UploadManager(cfg);

        String originalFilename = file.getOriginalFilename();
        // 构造文件目录和文件名
        assert originalFilename != null;
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
        String fileKey = qiniuConfig.getDirectory() + UUID.randomUUID() + suffix;

        // 上传文件
        uploadManager.put(file.getInputStream(), fileKey, upToken, null, null);

        // 返回文件url
        return qiniuConfig.getDomain() + fileKey;
    }
}