Spring Boot对接七牛云存储的详细步骤和流程

<dependency>
    <groupId>com.qiniu</groupId>
    <artifactId>qiniu-java-sdk</artifactId>
    <version>[7.2.0, 7.7.99]</version>
</dependency>

qiniu:
  accessKey: your_access_key
  secretKey: your_secret_key
  bucket: your_bucket_name
  domain: http://xxx.bkt.clouddn.com  # 存储空间访问域名
  region: huadong  # 存储空间所在地域（如华东：huadong）

@Data
@ConfigurationProperties(prefix = "qiniu")
public class QiniuProperties {
    private String accessKey;
    private String secretKey;
    private String bucket;
    private String domain;
    private String region;
}

@Component
public class QiniuUtils {
    @Autowired
    private QiniuProperties qiniuProperties;

    // 上传文件到七牛云
    public String uploadFile(MultipartFile file) {
        try {
            Configuration cfg = new Configuration(Region.region2()); // 根据实际地域选择
            UploadManager uploadManager = new UploadManager(cfg);
            
            Auth auth = Auth.create(qiniuProperties.getAccessKey(), qiniuProperties.getSecretKey());
            String upToken = auth.uploadToken(qiniuProperties.getBucket());
            
            // 生成唯一文件名（避免重复）
            String fileName = UUID.randomUUID().toString() + "_" + file.getOriginalFilename();
            
            // 上传并解析结果
            Response response = uploadManager.put(file.getBytes(), fileName, upToken);
            DefaultPutRet putRet = JSON.parseObject(response.bodyString(), DefaultPutRet.class);
            
            // 返回完整访问路径
            return qiniuProperties.getDomain() + "/" + putRet.key;
        } catch (Exception e) {
            throw new RuntimeException("上传失败：" + e.getMessage());
        }
    }
}

@RestController
@RequestMapping("/file")
public class FileController {
    @Autowired
    private QiniuUtils qiniuUtils;

    @PostMapping("/upload")
    public R uploadFile(@RequestParam("file") MultipartFile file) {
        String url = qiniuUtils.uploadFile(file);
        return R.success(url);
    }
}

public String generateDownloadUrl(String key) {
    Auth auth = Auth.create(accessKey, secretKey);
    return auth.privateDownloadUrl(domain + "/" + key, 3600); // 1小时有效
}

public void deleteFile(String key) {
    Auth auth = Auth.create(accessKey, secretKey);
    BucketManager bucketManager = new BucketManager(auth, config);
    bucketManager.delete(bucketName, key);
}

public List<String> listFiles(String prefix, String marker) {
    Auth auth = Auth.create(accessKey, secretKey);
    BucketManager bucketManager = new BucketManager(auth, config);
    BucketManager.FileListIterator fileListIterator = 
        bucketManager.createFileListIterator(bucketName, prefix, 1000, marker);
    
    List<String> fileList = new ArrayList<>();
    while (fileListIterator.hasNext()) {
        FileInfo[] items = fileListIterator.next();
        for (FileInfo item : items) {
            fileList.add(item.key);
        }
    }
    return fileList;
}

<form action="/file/upload" method="post" enctype="multipart/form-data">
    <input type="file" name="file">
    <button type="submit">上传</button>
</form>

$.ajax({
    url: "/file/upload",
    type: "POST",
    data: new FormData($("#uploadForm")[0]),
    processData: false,
    contentType: false,
    success: function(res) {
        console.log("上传成功：" + res.data);
    }
});

spring:
  servlet:
    multipart:
      max-file-size: 10MB
      max-request-size: 50MB