Httpclient 访问https

            X509TrustManager xtm = new X509TrustManager() { // 创建TrustManager
                @Override
                public void checkClientTrusted(
                        java.security.cert.X509Certificate[] arg0, String arg1)
                        throws java.security.cert.CertificateException {

                }

                @Override
                public void checkServerTrusted(
                        java.security.cert.X509Certificate[] arg0, String arg1)
                        throws java.security.cert.CertificateException {

                }

                @Override
                public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                    return null;
                }
            };
            // TLS1.0与SSL3.0基本上没有太大的差别，可粗略理解为TLS是SSL的继承者，但它们使用的是相同的SSLContext
            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
            client.getConnectionManager().getSchemeRegistry()
                    .register(new Scheme("https", 443, socketFactory));