android - 在 Android 中发布 JSON 和检索响应

Question

我正在尝试将 JSON 消息发布到站点并检索返回的 JSON 消息。
java.net.ProtocolException:方法不支持请求正文:POST有谁知道出了什么问题？提前致谢

                 HttpURLConnection conn=null;
        try{
            URL url=new URL(urlString);
            String userPassword = userName +":" + passWord;
            byte[] bytes=Base64.encode(userPassword.getBytes(),Base64.DEFAULT);
            String stringEncoding = new String(bytes, "UTF-8");

             conn = (HttpURLConnection) url.openConnection();
             conn.setReadTimeout(10000 /* milliseconds */);
             conn.setConnectTimeout(15000 /* milliseconds */);
             conn.setDoOutput(true);
             conn.setDoInput(true);
             conn.setRequestMethod("POST");
            conn.setRequestProperty ("Authorization", "Basic " + stringEncoding);
            conn.setRequestProperty("Content-Type", "application/json;charset=utf-8");
            Log.i("Net", "length="+conn.getContentLength());
            Log.i("Net", "contentType="+conn.getContentType());
            Log.i("Net", "content="+conn.getContent());
            conn.connect();

        }catch(Exception e){
            Log.d("Url Formation Connection", e.toString());
        } 

//输出{ 尝试{

            String requestString="{“ ";


            wr = new OutputStreamWriter(conn.getOutputStream());
            wr.write(requestString.toString());
            wr.flush();

    //input{
        BufferedReader rd = null;
        String response=" ";


            is = conn.getInputStream();
            rd = new BufferedReader(new InputStreamReader(is));
            String line;
            StringBuffer responseBuff = new StringBuffer();
            while ((line = rd.readLine()) != null) {
                // Process line...
                responseBuff.append(line);
            }
            response = responseBuff.toString();
            Log.d("response", response);
        }catch(Exception e){
            Log.d("buffer error", e.toString());
        }finally {
            if (is != null) {
                try {
                    wr.close();
                    is.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            } 

Answer 1

可能是您连接的服务器不允许 POST 操作。我会先尝试 GET 请求，看看您是否拥有该 Web 服务方法的权限。

此外，您可以使用更简单的 HttpClient 试试运气，尽管我自己还没有测试过此解决方案:http://www.geekmind.net/2009/11/android-simple-httpclient-to.html