文件上传后调用远程接口发送

最新推荐文章于 2025-05-29 16:46:16 发布

原创最新推荐文章于 2025-05-29 16:46:16 发布 · 183 阅读

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文章标签：

#java #spring boot

文章目录

概要

文件上传后调用远程接口发送

整体架构流程

技术名词解释

技术细节

   private static String getFileNameFromUrl(String urlString) {
        // 从URL中提取文件名
        int lastSlashIndex = urlString.lastIndexOf('/');
        if (lastSlashIndex != -1 && lastSlashIndex < urlString.length() - 1) {
            return urlString.substring(lastSlashIndex + 1);
        }
        return "unknown-file";
    }

    private static String getContentType(URLConnection connection) {
        // 获取文件类型
        String contentType = connection.getContentType();
        if (contentType == null) {
            return "application/octet-stream";
        }
        return contentType;
    }

    public static MultipartFile urlToMultipartFile(String urlString) {
        try {
            // 创建URL对象
            URL url = new URL(urlString);
            // 打开连接
            URLConnection connection = url.openConnection();
            // 获取输入流
            InputStream inputStream = connection.getInputStream();
            // 读取文件内容
            byte[] content = StreamUtils.copyToByteArray(inputStream);
            // 获取文件名
            String fileName = getFileNameFromUrl(urlString);
            // 创建MockMultipartFile对象
            MultipartFile multipartFile = new MockMultipartFile(fileName, fileName, getContentType(connection), content);
            // 关闭输入流
            inputStream.close();

            return multipartFile;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

@Override
    public String upload(String fileUrl) {

        MultipartFile multipartFile = urlToMultipartFile(fileUrl);

        String name = multipartFile.getOriginalFilename();
        String[] split = name.split("\\.");
        String body = "";
        File tempFile = null;
        try {
            tempFile = File.createTempFile(split[0], "." + split[1]);
            multipartFile.transferTo(tempFile);
            body = HttpRequest.post("https:////////////")
                    .header("Authorization", midKey)
                    .header(HttpHeaders.CONTENT_TYPE, "multipart/form-data")
//                    .header(HttpHeaders.CACHE_CONTROL, "no-cache")
                    .form("file", tempFile)
                    .execute()
                    .body();
        } catch (Exception e) {
            log.error("上传文件失败", e);
        } finally {
            if (tempFile != null) {
                tempFile.delete();
            }
        }
        JSONObject task = JSONObject.parseObject(body);
        return task.get("url").toString();
    }