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 = "\r\n";

        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();

        }