import java.net.MalformedURLException;
import java.net.URL;

public class HttpUtils {

public static void httpAsynTask(String strUrl, final CallBackString backString) {
    new AsyncTask<String, Integer, String>() {
        @Override
        protected String doInBackground(String... strings) {
            return httpGet(strings[0]);
        }
        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            //接口回调的方法
            backString.getData(s);
        }
    }.execute(strUrl);
}
//接口================================
interface  CallBackString{
    void   getData(String s);
}

public  static String httpGet(String strUrl) {
    //设置url
    try {
        URL url = new URL(strUrl);
        //获取HttpURLConnection
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        //设置为get请求
        connection.setRequestMethod("GET");
        //设置连接主机超时时间
        connection.setConnectTimeout(5000);
        //设置从主机读取数据超时
        connection.setReadTimeout(5000);
        //得到数据
        InputStream stream = connection.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
        //拼接数据
        StringBuilder builder = new StringBuilder();
        String str = "";
        while ((str = reader.readLine()) != null) {
            builder.append(str);
        }
        //关闭连接
        connection.disconnect();
        //返回数据
        return builder.toString();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

}