private static final String TAG = "HttpManager";

    private static final int CONNECT_TIME_OUT = 5000;

    public static String doHttpPost(String sUrl, String xml) {
        if (TextUtils.isEmpty(sUrl)) {
            Log.e(TAG, "http post url is empty!");
            return "";
        }
        if (sUrl.indexOf("https") > -1) {
            Log.e(TAG, "https post!");
            return "";
        }
        HttpURLConnection conn = null;

        try {
            URL url = new URL(sUrl);
            conn = (HttpURLConnection)url.openConnection();
            conn.setConnectTimeout(CONNECT_TIME_OUT);
            conn.setRequestMethod("POST");// 必须大写
            conn.setDoOutput(true);
            conn.setChunkedStreamingMode(0);

            writeOutputStream(conn.getOutputStream(), xml);
            if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
                return readInputStream(conn.getInputStream());
            }

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (conn != null) {
                conn.disconnect();
                conn = null;
            }
        }
        return "";
    }

    public static String doHttpsPost(String sUrl, String xml) {
        if (TextUtils.isEmpty(sUrl)) {
            Log.e(TAG, "https post url is empty!");
            return "";
        }
        if (sUrl.indexOf("https") > -1) {
            trustEveryone();
            HttpsURLConnection conn = null;

            try {
                URL url = new URL(sUrl);
                conn = (HttpsURLConnection)url.openConnection();
                conn.setConnectTimeout(CONNECT_TIME_OUT);
                conn.setRequestMethod("POST");// 必须大写
                conn.setDoOutput(true);
                conn.setChunkedStreamingMode(0);

                writeOutputStream(conn.getOutputStream(), xml);
                if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
                    return readInputStream(conn.getInputStream());
                }

            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                if (conn != null) {
                    conn.disconnect();
                    conn = null;
                }
            }
        }

        return "";
    }

    private static void writeOutputStream(OutputStream out, String outParams) {
        OutputStreamWriter writer = null;
        try {
            writer = new OutputStreamWriter(out, "UTF-8");
            writer.write(outParams);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (writer != null) {
                try {
                    writer.flush();
                    writer.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
        }
    }

    private static String readInputStream(InputStream in) {
        StringBuilder builder = new StringBuilder();
        BufferedReader reader = null;
        try {
            reader = new BufferedReader(new InputStreamReader(in));
            String buffer = "";
            while ((buffer = reader.readLine()) != null) {
                builder.append(buffer);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (reader != null) {
                    reader.close();
                    reader = null;
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
        return builder.toString();
    }

    private static void trustEveryone() {
        try {
            HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {

                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });
            SSLContext context = SSLContext.getInstance("TLS");
            context.init(null, new X509TrustManager[] {
                new X509TrustManager() {
                    public void checkClientTrusted(X509Certificate[] chain, String authType)
                            throws CertificateException {
                    }

                    public void checkServerTrusted(X509Certificate[] chain, String authType)
                            throws CertificateException {
                    }

                    public X509Certificate[] getAcceptedIssuers() {
                        return new X509Certificate[0];
                    }
                }
            }, null);
            HttpsURLConnection.setDefaultSSLSocketFactory(context.getSocketFactory());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }