Android应用中的HTTP发布未按预期工作

Question

尝试将用户注册到数据库中。

此代码有效：

try {
            URL url = new URL("http://www.jacksteel.co.uk/Comp4/registeruser.php?" + getQuery(userData));
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setReadTimeout(10000);
            conn.setConnectTimeout(15000);
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true);


            OutputStream os = conn.getOutputStream();
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
            writer.write(getQuery(userData));
            Log.d("myTag", getQuery(userData));

            writer.flush();
            writer.close();
            os.close();
            Log.d("myTag",conn.getInputStream().toString());


            conn.connect();

        } catch (Exception e) {
            e.printStackTrace();
        }

但是这段代码没有：

 try {
            URL url = new URL("http://www.jacksteel.co.uk/Comp4/registeruser.php");
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setReadTimeout(10000);
            conn.setConnectTimeout(15000);
            conn.setRequestMethod("POST");
            conn.setDoInput(true);
            conn.setDoOutput(true);


            OutputStream os = conn.getOutputStream();
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
            writer.write(getQuery(userData));
            Log.d("myTag", getQuery(userData));

            writer.flush();
            writer.close();
            os.close();
            Log.d("myTag",conn.getInputStream().toString());


            conn.connect();

        } catch (Exception e) {
            e.printStackTrace();
        }

唯一的区别是我将getQuery（）的结果连接到URL的末尾，这表明HTTP帖子不起作用，我从here获得了Post的代码我已经拥有了nameValuePair列表中的数据名为＆＃39; userData＆＃39;

所以，我的问题是，如果没有将getQuery(userData)附加到网址，它为什么不起作用，我可以让它发挥作用吗？