Ta的回复 ：没有啊，下面是我的代码，您帮忙看一下,url和callback参数应该是没有问题的： public void test() {         String add_url = "http://vop.baidu.com/server_api";         try {             URL url = new URL(add_url);             HttpURLConnection connection = (HttpURLConnection) url.openConnection();             connection.setDoInput(true);             connection.setDoOutput(true);             connection.setRequestMethod("POST");             connection.setUseCaches(false);             connection.setInstanceFollowRedirects(true);             connection.setRequestProperty("Content-Type", "application/json");             connection.connect();             DataOutputStream out = new DataOutputStream(connection.getOutputStream());             JSONObject obj = new JSONObject();             obj.put("format", "wav");             obj.put("rate", 8000);             obj.put("channel", 1);             obj.put("lan","zh");             obj.put("cuid", "f0:de:f1:a6:8e:d7");             obj.put("token", "24.ab0c4b65182b290f752dd115ab693315.2592000.1477551500.282335-7792516");             obj.put("url", "*******");             obj.put("callback", "*********");             out.writeBytes(obj.toString());             out.flush();             out.close();             BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));             String lines;             StringBuffer sbf = new StringBuffer();             while ((lines = reader.readLine()) != null) {                 lines = new String(lines.getBytes(), "utf-8");                 sbf.append(lines);             }             System.out.println(sbf);             reader.close();             // 断开连接             connection.disconnect();         } catch (Exception e) {             // TODO Auto-generated catch block             e.printStackTrace();         }     }