求大神讲解 微信上传临时素材出问题

HttpURLConnection meidaConn = (HttpURLConnection) mediaUrl.openConnection();
meidaConn.setDoOutput(true);
meidaConn.setRequestMethod("GET");

                    问题：
                    java.lang.ClassCastException: sun.net.www.protocol.https.HttpsURLConnectionImpl cannot be cast to org.apache.commons.httpclient.util.HttpURLConnection