使用HttpUrlconnection进行登录和上传图像时遇到问题

Question

我制作了一个具有授权部分和主体部分的API。正文部分供用户上传图像。对于基本身份验证部分，只需要用户名和密码。对于上传部分，它需要两个参数和一个jpeg图像文件。我只是从一些资源上载了文件，但没有合并登录部分，所以我自己修改了它，但是我不知道我的代码有什么问题，它不起作用。以下是我的代码：

 public String multipartRequest(String urlTo, Map<String, String> parmas, String filepath, String filefield, String fileMimeType) throws CustomException {

        HttpsURLConnection connection = null;
        DataOutputStream outputStream = null;
        InputStream inputStream = null;

        String twoHyphens = "--";
        String boundary = "*****" + Long.toString(System.currentTimeMillis()) + "*****";
        String lineEnd = "\r\n";

        String result = "";

        int bytesRead, bytesAvailable, bufferSize;
        byte[] buffer;
        int maxBufferSize = 1 * 1024 * 1024;

        String[] q = filepath.split("/");
        int idx = q.length - 1;

        try {
            File file = new File(filepath);
            FileInputStream fileInputStream = new FileInputStream(file);


            URL url = new URL(urlTo);


            connection = (HttpsURLConnection) url.openConnection();

            ///// certification
            SSLContext sc = SSLContext.getInstance("TLS");
            sc.init(null, trustAllCerts, new java.security.SecureRandom());
            SSLSocketFactory newFactory = sc.getSocketFactory();
            connection.setSSLSocketFactory(newFactory);
            connection.setHostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });

            connection.setDoInput(true);
            connection.setDoOutput(true);
            connection.setUseCaches(false);

            String a = username + ":" + password;
            byte[] data = a.getBytes();
            String info = "Basic " + Base64.encodeToString(data, Base64.DEFAULT);
            connection.setRequestProperty("Authorization", info);
            connection.setRequestProperty("Accept", "application/json");
            connection.setRequestProperty("Content-Type", "text/plain");

            connection.setRequestMethod("POST");
            connection.setRequestProperty("Connection", "Keep-Alive");
            connection.setRequestProperty("User-Agent", "Android Multipart HTTP Client 1.0");
            connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);


            outputStream = new DataOutputStream(connection.getOutputStream());
            outputStream.writeBytes(twoHyphens + boundary + lineEnd);
            outputStream.writeBytes("Content-Disposition: form-data; name=\"" + filefield + "\"; filename=\"" + q[idx] + "\"" + lineEnd);
            outputStream.writeBytes("Content-Type: " + fileMimeType + lineEnd);
            outputStream.writeBytes("Content-Transfer-Encoding: binary" + lineEnd);

            outputStream.writeBytes(lineEnd);


            bytesAvailable = fileInputStream.available();
            bufferSize = Math.min(bytesAvailable, maxBufferSize);
            buffer = new byte[bufferSize];

            bytesRead = fileInputStream.read(buffer, 0, bufferSize);
            while (bytesRead > 0) {
                outputStream.write(buffer, 0, bufferSize);
                bytesAvailable = fileInputStream.available();
                bufferSize = Math.min(bytesAvailable, maxBufferSize);
                bytesRead = fileInputStream.read(buffer, 0, bufferSize);
            }

            outputStream.writeBytes(lineEnd);


            // Upload POST Data
            Iterator<String> keys = parmas.keySet().iterator();
            while (keys.hasNext()) {
                String key = keys.next();
                String value = parmas.get(key);

                outputStream.writeBytes(twoHyphens + boundary + lineEnd);
                outputStream.writeBytes("Content-Disposition: form-data; name=\"" + key + "\"" + lineEnd);
                outputStream.writeBytes("Content-Type: text/plain" + lineEnd);
                outputStream.writeBytes(lineEnd);
                outputStream.writeBytes(value);
                outputStream.writeBytes(lineEnd);
            }


            outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);


            inputStream = connection.getInputStream();

            result = this.convertStreamToString(inputStream);

            fileInputStream.close();
            inputStream.close();
            outputStream.flush();
            outputStream.close();

            return result;

        } catch (Exception e) {
            throw new CustomException("error e");
        }


    }

    private String convertStreamToString(InputStream is) {
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();

        String line = null;
        try {
            while ((line = reader.readLine()) != null) {
                sb.append(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return sb.toString();
    }

我不知道为什么它不起作用。

有人知道如何使用httpurlconnection进行登录和上传文件吗？在我的代码中，我添加了以下两行，这是问题吗？我的意思是多次使用“ Content-Type”（登录和上传文件）：

对于登录部分：

connection.setRequestProperty("Content-Type", "text/plain");

对于上传文件部分：

connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);

但是我同时调用它们（相同的功能），这有问题吗？