String urlPath = "http://www.xxxxx.com";
            URL url = new URL(urlPath);// 得到网址
            String BOUNDARY = "---------7d4a6d158c9";// 设置分隔线
            byte[] end_data = ("\r\n--" + BOUNDARY + "--\r\n").getBytes();// 定义最后数据分隔线
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();//获得连接
            // 参数设置
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod("POST");
            OutputStream outputStream = conn.getOutputStream();//获得输出流
            StringBuilder sb = new StringBuilder();
            sb.append("--");
            sb.append(BOUNDARY);
            sb.append("\r\n");
            sb.append("Content-Disposition: form-data;name=\"file1\";filename=\""
                    + file.getName() + "\"\r\n");
            sb.append("Content-Type:application/octet-stream\r\n\r\n");
            sb.append(end_data);
            byte[] data = sb.toString().getBytes();
            outputStream.write(data);

            // 开始上传
            int outSize;
            byte[] outBuff = new byte[1024];
            while ((outSize = fileInputStream.read(outBuff, 0, 1024)) > 0) {
                outputStream.write(outBuff, 0, outSize);// 开始上传
            }
            outputStream.flush();
            outputStream.close();
            fileInputStream.close();