Java 以post方式获取数据

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之前一直是以GET的方式来请求数据，今天有个需求是以post的方式来获取数据，记录下。post 的参数有2种，一种是以string型的json格式数据，另一种是Map格式的数据

代码很简单，基本是一些流的操作和post格式设置。
代码如下：

/**     *     * @param url     * @param isPostByJsonData 是否是String类型的json格式     * @param jsonData  String类型的json格式数据     * @param params map类型的数据     */    public void getDataByPost(String url, boolean isPostByJsonData, String jsonData, Map<String, String> params){        InputStream inputStream = null;        HttpURLConnection urlConnection = null;        PrintWriter printWriter = null;        BufferedReader bufferReader = null;        InputStreamReader inputRader = null;        StringBuffer contentBuffer = new StringBuffer();        try {            URL url1 = new URL(url);            urlConnection = (HttpURLConnection) url1.openConnection();            urlConnection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");            urlConnection.setRequestProperty("Accept", "application/json");            urlConnection.setRequestMethod("POST");            urlConnection.setDoOutput(true);            StringBuffer stringBufParams = new StringBuffer();            if(isPostByJsonData){                stringBufParams.append(jsonData);            }else {                if(params != null){                    for (Map.Entry<String, String> entry : params.entrySet()) {                        stringBufParams.append(entry.getKey()).append("=").append(entry.getValue()).append("&");                    }                    stringBufParams.deleteCharAt(stringBufParams.length() - 1);                }            }            printWriter = new PrintWriter(urlConnection.getOutputStream());            printWriter.print(stringBufParams);            printWriter.flush();            int statusCode = urlConnection.getResponseCode();            if (statusCode == 200){                inputStream =urlConnection.getInputStream();                inputRader = new InputStreamReader(inputStream, "utf-8");                bufferReader = new BufferedReader(inputRader);                String line = null;                while (null != (line = bufferReader.readLine())) {                    contentBuffer.append(line);                }                String dd = contentBuffer.toString();                Log.e("xxx", "NetUtils dd = "+dd);            }        } catch (MalformedURLException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }finally {            try {                if (printWriter != null) {                    printWriter.close();                }            } catch (Exception e) {            }        }    }

注意了，如果是Android开发，一定要在子线程中调用该方法，不然会crash.

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