HttpURLConnection获取url 302地址

本文主要是介绍HttpURLConnection获取url 302地址，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

有时候需要从访问的url地址中取出302地址，自己做处理（当然，是针对一次重定向）

public void onStartTest() {new Thread(new Runnable() {@Override
        public void run() {test302();
        }}).start();
}private void test302() {String strUrl = "http://www.sogou.com";
    try {HttpURLConnection urlConnection = getConnection(strUrl);
        urlConnection.connect();
        if (urlConnection.getResponseCode() == 302) {String url302 = urlConnection.getHeaderField("Location");
            if (TextUtils.isEmpty(url302)) {url302 = urlConnection.getHeaderField("location"); //临时重定向和永久重定向location的大小写有区分
            }if (!(url302.startsWith("http://") || url302.startsWith("https://"))) { //某些时候会省略host，只返回后面的path，所以需要补全url
                URL originalUrl = new URL(strUrl);
                url302 = originalUrl.getProtocol() + "://" + originalUrl.getHost() + ":" + originalUrl.getPort() + url302;
            }if (mCallback != null) {mCallback.callback(url302);
            }}} catch (IOException e) {e.printStackTrace();
    }
}/**
 * 获取GET连接
 *
 * @param strUrl 连接的地址
 * @return 连接对象
 * @throws IOException
 */
private HttpURLConnection getConnection(String strUrl) throws IOException {URL url = new URL(strUrl);
    HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
    httpURLConnection.setUseCaches(false);
    httpURLConnection.setInstanceFollowRedirects(false); //设置成false，则需要自己从http reply中分析新的url自己重新连接。
    httpURLConnection.setConnectTimeout(10000);
    httpURLConnection.setReadTimeout(10000);
    return httpURLConnection;
}