[Java知识库]SpringBoot整合七牛云实现文件上传

七牛云文件上传

1、引入Maven依赖

<dependency>
    <groupId>com.qiniu</groupId>
    <artifactId>qiniu-java-sdk</artifactId>
    <version>[7.7.0, 7.7.99]</version>
</dependency>

2、配置yaml文件

qiniu:
  accessKey: 2mz0xTvAym2AzqMZjRARPSRDYtxO3NLbaJV6Lakw # 公钥
  secretKey: _UBkk3q2VNzSUjIbogJggp2klvhb9X_4VUvrj5YJ # 私钥
  bucketName: ken-chy-blog  #存储空间名称
  path: http://cdn.ken-chy129.cn

公钥与私钥可以到密钥管理处查看

bucket为创建的对象存储的空间名称

path为文件管理中的外链域名(默认使用七牛云测试域名)

3、编写对应配置类

@org.springframework.context.annotation.Configuration
public class UploadConfig {

    @Value("${qiniu.accessKey}")
    private String accessKey;
    @Value("${qiniu.secretKey}")
    private String secretKey;

    @Bean
    public Auth getAuth(){
        return Auth.create(accessKey,secretKey);
    }

    @Bean
    public UploadManager getUploadManager(){
        return new UploadManager(new Configuration());
    }
}

其中Auth.create()传入公钥私钥以创建权限，供UploadManager上传文件时使用

4、编写七牛云工具类

@Component
public class QiniuUtils {

    @Autowired
    private UploadManager uploadManager;

    @Autowired
    private Auth auth;

    @Value("${qiniu.bucketName}")
    private String bucketName;
    @Value("${qiniu.path}")
    private String url;

    public String upload(FileInputStream file, String fileName) throws QiniuException {
        String token = auth.uploadToken(bucketName);
        Response res = uploadManager.put(file, fileName, token, null, null);
        if (!res.isOK()) {
            throw new RuntimeException("上传七牛云出错:" + res);
        }
        return url+"/"+fileName;
    }
}

创建StringUtils工具类以生成图片名称

public class StringUtils {

    /**
     * @Description: 生成唯一图片名称
     * @Param: fileName
     * @return: 云服务器fileName
     */
    public static String getRandomImgName(String fileName) {

        int index = fileName.lastIndexOf(".");

        if (fileName.isEmpty() || index == -1){
            throw new IllegalArgumentException();
        }
        // 获取文件后缀
        String suffix = fileName.substring(index).toLowerCase();
        // 生成UUID
        String uuid = UUID.randomUUID().toString().replaceAll("-", "");
        // 生成上传至云服务器的路径
        return "userAvatar:" + uuid + suffix;
    }
}

5、编写Service层

@Service
public class PictureServiceImpl implements PictureService {

    @Autowired
    private QiniuUtils qiniuUtils;

    @Override
    public Result<String> upload(MultipartFile file) {
        if (file.isEmpty()) {
            return new Result<String>().failed(StatusCode.PICTURE_NULL);
        }
        String fileName = StringUtils.getRandomImgName(Objects.requireNonNull(file.getOriginalFilename()));
        try {
            FileInputStream uploadFile = (FileInputStream) file.getInputStream();
            String path = qiniuUtils.upload(uploadFile, fileName);
            return new Result<String>().success(path);
        } catch (IOException e) {
            e.printStackTrace();
            return new Result<String>().failed(StatusCode.ERROR);
        }
    }
}

6、编写controller层

@RestController
@CrossOrigin
public class PictureController {
    
    @Autowired
    private PictureService pictureService;

    @PostMapping(value = "/upload")
    public Result<String> upload(@RequestParam("file") MultipartFile file) {
        return pictureService.upload(file);
    }
}