Http的带参数请求举栗

    public void getWithParams(View view) {
        Map<String, String> params = new HashMap<>();
        params.put("keyword", "key");
        params.put("page", "123");
        params.put("order", "0");
        startRequest(params, "GET", "/get/param");
    }

    private void startRequest(final Map<String, String> params, final String method, final String api) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                BufferedReader br = null;
                try {
                    StringBuilder sb = new StringBuilder();
                    if (params != null && params.size() > 0) {
                        sb.append("?");
                        Iterator<Map.Entry<String, String>> iterator = params.entrySet().iterator();
                        while (iterator.hasNext()) {
                            Map.Entry<String, String> next = iterator.next();
                            sb.append(next.getKey());
                            sb.append("=");
                            sb.append(next.getValue());
                            if (iterator.hasNext()) {
                                sb.append("&");
                            }
                        }
                        Log.e(TAG, "run: " + sb.toString());
                    }
                    String params = sb.toString();
                    URL url;
                    if (params != null && params.length() > 0) {
                        url = new URL(BASE_URL + api + params);
                    } else {
                        url = new URL(BASE_URL + api);
                    }
                    Log.e(TAG, "run: " + url.toString());
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    connection.setRequestMethod(method);
                    connection.setConnectTimeout(10000);
                    connection.setRequestProperty("Content-Type", "application/json;charset=UTF-8");
                    connection.connect();

                    int responseCode = connection.getResponseCode();
                    Log.e(TAG, "run: " + responseCode);
                    if (responseCode == 200) {
                        InputStream inputStream = connection.getInputStream();
                        
                        br = new BufferedReader(new InputStreamReader(inputStream));
                        String line = br.readLine();
                        Log.e(TAG, "run: " + line);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }finally {
                    try {
                        br.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }).start();
    }
}