public static String httpsGet(String url) {
        PrintUtils.soutIfTest("[HttpsGet URL] " + url);
        HttpClient httpsClient = new DefaultHttpClient();
        HttpGet httpGet = new HttpGet(url);
        X509TrustManager xtm = new X509TrustManager() { // 创建TrustManager
            public void checkClientTrusted(X509Certificate[] chain,
                                           String authType) throws CertificateException {
            }

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

            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }
        };

        try {
            SSLContext ctx = SSLContext.getInstance("TLS");
            // 使用TrustManager来初始化该上下文，TrustManager只是被SSL的Socket所使用
            ctx.init(null, new TrustManager[]{xtm}, null);
            // 创建SSLSocketFactory
            SSLSocketFactory socketFactory = new SSLSocketFactory(ctx);
            // 通过SchemeRegistry将SSLSocketFactory注册到我们的HttpClient上
            httpsClient.getConnectionManager().getSchemeRegistry()
                    .register(new Scheme("https", 443, socketFactory));
            HttpResponse response = httpsClient.execute(httpGet);
            HttpEntity entity = response.getEntity();
            String content = EntityUtils.toString(entity, "utf-8");
            return content;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }