Android面向HTTP协议发送get请求

/** * 采用get请求的方式 *  * @param username * @param password * @return null表示求得的路径有问题,text返回请求得到的数据 */public static String getRequest(String username, String password) {try {String path = "http://172.22.64.156:8080/0001AndroidWebService/LoginServlet?username="+ URLEncoder.encode(username)+ "&password="+ URLEncoder.encode(password);URL url = new URL(path);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setReadTimeout(500);conn.setRequestMethod("GET");int code = conn.getResponseCode();if (code == 200) {// 请求成功InputStream is = conn.getInputStream();String text = StreamUtil.readStream(is);return text;} else {// 请求失败return null;}} catch (Exception e) {e.printStackTrace();}return null;}