微信公众号对接

微信对接平台链接

这个接口的media参数有点发懵，用okhttp请求，参数头尝试了几次均失败，记录下成功的java实现

public static String uploadPermanentMaterial(String url, File file) {
        String result = null;
        try {
            URL uploadUrl = new URL(url);
            HttpURLConnection conn = (HttpURLConnection)uploadUrl.openConnection();
            conn.setConnectTimeout(5000);
            conn.setReadTimeout(30000);
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("Cache-Control", "no-cache");
            String boundary = "-----------------------------" + System.currentTimeMillis();
            conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
            OutputStream output = conn.getOutputStream();
            output.write(("--" + boundary + "\r\n").getBytes());
            output.write(
                String.format("Content-Disposition: form-data; name=\"media\"; filename=\"%s\"\r\n", file.getName())
                    .getBytes());
            output.write("Content-Type: video/mp4 \r\n\r\n".getBytes());
            byte[] data = new byte[1024];
            int len;
            FileInputStream input = new FileInputStream(file);
            while ((len = input.read(data)) > -1) {
                output.write(data, 0, len);
            }
            output.write(("\r\n--" + boundary + "--\r\n\r\n").getBytes());
            output.flush();
            output.close();
            input.close();
            InputStream resp = conn.getInputStream();
            StringBuilder sb = new StringBuilder();
            while ((len = resp.read(data)) > -1) {
                sb.append(new String(data, 0, len, StandardCharsets.UTF_8));
            }
            resp.close();
            result = sb.toString();
        } catch (IOException e) {
            System.out.println("上传封面图异常");
        }
        return result;
    }

另外推荐 wxJava开源项目作为微信对接的方式，最大的好处是对接方便以及解决了refresh token的问题。