我用httpclient fluent无法上传。一直报41005。  经过几番探索，得用原始的http请求。贴代码：




public static String uploadmedia(String authorizerAccessToken, MultipartFile mediaFile) {
        try {
            URL urlObj = new URL("https://api.weixin.qq.com/wxa/uploadmedia?access_token=" + authorizerAccessToken);
            HttpURLConnection conn = (HttpURLConnection)urlObj.openConnection();
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setUseCaches(false);
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("Charset", "UTF-8");
            String BOUNDARY = "----------" + System.currentTimeMillis();
            conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + BOUNDARY);
            StringBuilder sb = new StringBuilder();
            sb.append("--");
            sb.append(BOUNDARY);
            sb.append("\r\n");
            sb.append("Content-Disposition:form-data;name=\"media\";filename=\"" + mediaFile.getOriginalFilename() + "\";filelength=\"" + mediaFile.getSize() + "\"\r\n");
            sb.append("Content-Type:application/octet-stream\r\n\r\n");
            byte[] head = sb.toString().getBytes("utf-8");
            OutputStream out = new DataOutputStream(conn.getOutputStream());
            out.write(head);
            out.write(mediaFile.getBytes());
            byte[] foot = ("\r\n--" + BOUNDARY + "--\r\n").getBytes("utf-8");
            out.write(foot);
            out.flush();
            out.close();
            StringBuffer buffer = new StringBuffer();
            BufferedReader reader = null;
            String result = null;


            try {
                reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                String line = null;


                while((line = reader.readLine()) != null) {
                    buffer.append(line);
                }


                if (result == null) {
                    result = buffer.toString();
                }
            } catch (IOException var17) {
                var17.printStackTrace();
            } finally {
                reader.close();
            }


            return result;
        } catch (IOException var19) {
            logger.error(BizLog.buildLogInfo("uploadmedia: " + ExceptionUtils.getStackTrace(var19)));
            return null;
        }
    }