图片上传

上传图片返回路径

public class UploadUtil {
    /***
     * 上传图片到阿里云，返回路径
     * @param inputStream 文件输入流
     * @return
     */
    public static String uploadPNGImage(InputStream inputStream) {
        //工具类获取值
        String endpoint = "oss-cn-beijing.aliyuncs.com";
        String accessKeyId = "XXX";
        String accessKeySecret = "XXX";
        String bucketName = "XXX";
        String aliasUrl = "https://XXX.com/";
        //创建OSS实例
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        // 根据日期分隔
        String folder = new DateTime().toString("yyMMdd");
        // UUID
        String fileName = UUID.randomUUID().toString().replaceAll("-", "");
        // oss中的文件夹名
        String objectName = "img/" + folder + "/" + fileName + ".png";
        // 创建上传文件的元信息，可以通过文件元信息设置HTTP header(设置了才能通过返回的链接直接访问)。
        //如果不设置，直接访问url会自行下载图片，看各位自己选择
        ObjectMetadata objectMetadata = new ObjectMetadata();
        objectMetadata.setContentType("image/png");
        ossClient.putObject(bucketName, objectName, inputStream,objectMetadata);
        // 关闭OSSClient。
        ossClient.shutdown();
        return aliasUrl + objectName;
    }
}

controller 示例
单图、多图、流文件(Content-Type: application/octet-stream)

@Slf4j
@Controller
@RestController
@RequestMapping("/img")
public class CityController {
    @Autowired
    private CityService cityService;
    @PostMapping("/update")
    public JSONResult uploadImage(@RequestParam("image") MultipartFile file) {
        InputStream inputStream;
        try {
            inputStream = file.getInputStream();
        } catch (IOException e) {
            log.error("updateCityImage", e);
            return JSONResult.errorMsg("Upload Err: " + e.toString());
        }
        String url = UploadUtil.uploadPNGImage(inputStream);
        return JSONResult.ok(url);
    }
    @PostMapping("/upload")
    public JSONResult uploadImages(@RequestParam("images") MultipartFile[] files) {
        for (MultipartFile file: files) {
            if (file.getSize() / 100 > 1000) {
                return JSONResult.errorMsg("图片不能超过1M");
            }
        }
        List<String> urls = new ArrayList<>(files.length);
        for (MultipartFile file : files) {
            InputStream inputStream;
            try {
                inputStream = file.getInputStream();
            } catch (IOException e) {
                log.error("updateCityImage", e);
                return JSONResult.errorMsg("Upload Err: " + e.toString());
            }
            String url = UploadUtil.uploadPNGImage(inputStream);
            urls.add(url);
        }
        return JSONResult.ok(urls);
    }
    @PostMapping("/binary_update")
    public JSONResult binaryUpdate(HttpServletRequest request) {
        InputStream inputStream;
        try {
            inputStream = request.getInputStream();
        } catch (IOException e) {
            log.error("binaryUpdate", e);
            return JSONResult.errorMsg("Upload Err: " + e.toString());
        }
        String url = UploadUtil.uploadPNGImage(inputStream);
        return JSONResult.ok(url);
    }
}