Android 用HttpURLConnection访问网络的方法

HttpURLConnection connection = null;try { URL url = new URL("https://www.xxx.com/"); connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET");//设置访问方式为“GET” connection.setConnectTimeout(8000);//设置连接服务器超时时间为8秒 connection.setReadTimeout(8000);//设置读取服务器数据超时时间为8秒 if (HttpURLConnection.HTTP_OK == connection.getResponseCode()) {  //从服务器获取响应并把响应数据转为字符串打印  InputStream in = connection.getInputStream();  BufferedReader reader = new BufferedReader(new InputStreamReader(in));  StringBuilder response = new StringBuilder();  String line;  while (null != (line = reader.readLine())) {    response.append(line);  }  Log.d(TAG, response.toString()); }} catch (Exception e) { e.printStackTrace();} finally { if (null!= connection) {   connection.disconnect(); }}

HttpURLConnection connection = null;  try{   URL url = new URL("https://www.xxx.com/");   connection = (HttpURLConnection) url.openConnection();   connection.setRequestMethod("POST");   connection.setConnectTimeout(8000);   connection.setReadTimeout(8000);   connection.setDoOutput(true);// 使用 URL 连接进行输出   connection.setDoInput(true);// 使用 URL 连接进行输入   connection.setUseCaches(false);// 忽略缓存   // 建立输出流，并写入数据   OutputStream outputStream = connection.getOutputStream();   DataOutputStream dataOutputStream = new DataOutputStream(outputStream);   dataOutputStream.writeBytes("username=admin&password=888888");   dataOutputStream.close();   if (HttpURLConnection.HTTP_OK == connection.getResponseCode()) {    // 当正确响应时处理数据    StringBuffer response = new StringBuffer();    String line;    BufferedReader responseReader =       new BufferedReader(new InputStreamReader(connection.getInputStream(), "utf-8"));    // 处理响应流，必须与服务器响应流输出的编码一致    while (null != (line = responseReader.readLine())) {     response.append(line);    }    responseReader.close();    Log.d(TAG, response.toString());   }  } catch (Exception e) {   e.printStackTrace();  } finally {   if (null!= connection) {    connection.disconnect();   }  }