代码如下:
public String getMsg() { String result = ""; try { URL url = new URL("https://XXXX.cn/token"); //通过调用url.openConnection()来获得一个新的URLConnection对象,并且将其结果强制转换为HttpURLConnection. HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); urlConnection.setRequestMethod("POST"); //设置连接的超时值为30000毫秒,超时将抛出SocketTimeoutException异常 urlConnection.setConnectTimeout(30000); //设置读取的超时值为30000毫秒,超时将抛出SocketTimeoutException异常 urlConnection.setReadTimeout(30000); //将url连接用于输出,这样才能使用getOutputStream()。getOutputStream()返回的输出流用于传输数据 urlConnection.setDoOutput(true); //设置通用请求属性为默认浏览器编码类型 urlConnection.setRequestProperty("content-type", "application/x-www-form-urlencoded"); //getOutputStream()返回的输出流,用于写入参数数据。 OutputStream outputStream = urlConnection.getOutputStream(); String content = "grant_type=password&app_key="+APP_KEY+"&app_secret="+APP_SECRET; outputStream.write(content.getBytes()); outputStream.flush(); outputStream.close(); //此时将调用接口方法。getInputStream()返回的输入流可以读取返回的数据。 InputStream inputStream = urlConnection.getInputStream(); byte[] data = new byte[1024]; StringBuilder sb = new StringBuilder(); //inputStream每次就会将读取1024个byte到data中,当inputSteam中没有数据时,inputStream.read(data)值为-1 while (inputStream.read(data) != -1) { String s = new String(data, Charset.forName("utf-8")); sb.append(s); } result = sb.toString(); inputStream.close(); } catch (IOException e) { e.printStackTrace(); } return result; }