Android 使用URLConnection提交请求

new Thread(new Runnable() {            @Override            public void run() {                String result = "   ";                BufferedReader bufferedReader;                try {                    URL url = new URL("http://csdnimg.cn/pubfooter/js/repoAddr2.js?v=0.8046029126271605");                    URLConnection urlConnection = url.openConnection();                    // 不确定有什么用，以后再说                    //urlConnection.setRequestProperty("accept", "*/*");                    urlConnection.connect();                    Map<String, List<String>> map = urlConnection.getHeaderFields();                    for (String key : map.keySet()) {                        Log.e("URLConnectionTag", key + "->" + map.get(key));                    }                    bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));                    String line;                    result = "";                    while ((line = bufferedReader.readLine()) != null) {                        result += line + "\n";                    }                } catch (MalformedURLException e) {                    e.printStackTrace();                } catch (IOException e) {                    e.printStackTrace();                }            }        }).start();