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  • android 向服务器上传

    采用数据流的格式向服务器上传。

    代码如下:

    private void upload(String requestURL) {                          //参数requestURL 为目标url

            String BOUNDARY = UUID.randomUUID().toString(); // 边界标识 随机生成
            String PREFIX = "--", LINE_END = " ";
            String CONTENT_TYPE = "multipart/form-data"; // 内容类型

            try {
                URL url = new URL(requestURL);
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setReadTimeout(10000);
                conn.setConnectTimeout(10000);
                conn.setDoInput(true); // 允许输入流
                conn.setDoOutput(true); // 允许输出流
                conn.setUseCaches(false); // 不允许使用缓存
                conn.setRequestMethod("POST"); // 请求方式
                conn.setRequestProperty("Charset", HTTP.UTF_8); // 设置编码
                conn.setRequestProperty("connection", "keep-alive");
                conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);

                //SET-COOKIE
                /**

         CookieManger cookieManger = new CookieManger();
                String cookie = cookieManger.getCookie();
                if (cookie != null && cookie.length() > 0) {
                    conn.setRequestProperty("Cookie", cookie);
                }

                */

                if (bitmap != null) {          //此处以图片bitmap格式为例,别的格式一样
                    /**
                     * 当文件不为空时执行上传
                     */
                    DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
                    StringBuffer sb = new StringBuffer();
                    sb.append(PREFIX);
                    sb.append(BOUNDARY);
                    sb.append(LINE_END);
                    /**
                     * 这里重点注意: name里面的值为服务器端需要key 只有这个key 才可以得到对应的文件
                     * filename是文件的名字,包含后缀名
                     */

                    sb.append("Content-Disposition: form-data; name="imgFile"; filename="" + System.currentTimeMillis() + ".jpg" + """ + LINE_END);
                    sb.append("Content-Type: application/octet-stream; charset=" + HTTP.UTF_8 + LINE_END);
                    sb.append(LINE_END);
                    dos.write(sb.toString().getBytes());

                    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
                    bitmap.compress(Bitmap.CompressFormat.JPEG, 100, outputStream);
                    InputStream is = new ByteArrayInputStream(outputStream.toByteArray());
                    outputStream.close();
                    byte[] bytes = new byte[1024];
                    int len = 0;
                    while ((len = is.read(bytes)) != -1) {
                        dos.write(bytes, 0, len);
                    }
                    is.close();
                    dos.write(LINE_END.getBytes());
                    byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END).getBytes();
                    dos.write(end_data);
                    dos.flush();                     //到此向服务器发送数据完成

         //开始获取服务器返回数据

                    InputStream input = conn.getInputStream(); 
                    if (input != null) {
                        byte[] b = new byte[1024];
                        int readCount = input.read(b);
                        String result = new String(b, 0, readCount);
                        if (result != null && result.length() > 0) {
                            parseJson(result);
                        }
                        input.close();
                        Log.e("atel", "result : " + result);
                    }
                }
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

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  • 原文地址:https://www.cnblogs.com/lianghui66/p/3544049.html
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