新旧apache HttpClient 获取httpClient方法

在apache httpclient 4.3版本中对很多旧的类进行了deprecated标注，通常比较常用的就是下面两个类了。

DefaultHttpClient —> CloseableHttpClient
HttpResponse —> CloseableHttpResponse

目前互联网对外提供的接口通常都是HTTPS协议，有时候接口提供方所示用的证书会出现证书不受信任的提示，chrome访问接口（通常也不会用chrome去访问接口，只是举个例子）会出现这样的提示：

为此我们调用这类接口的时候就要忽略掉证书认证信息，我们调用接口的httpClient就要做特殊处理。下面记录下httpclient 4.3以前和之后的httpClient获取方法。

httpclient jar包4.3以前版本获取HttpClient方法如下：

public static HttpClient getHttpClient(HttpClient base) {
        try {
            SSLContext ctx = SSLContext.getInstance("SSL");
            X509TrustManager tm = new X509TrustManager() {
                public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                    return null;
                }

                @Override
                public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
                }

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

            ctx.init(null, new TrustManager[] {tm}, null);
            SSLSocketFactory ssf = new SSLSocketFactory(ctx, SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
            ClientConnectionManager mgr = base.getConnectionManager();
            SchemeRegistry registry = mgr.getSchemeRegistry();
            registry.register(new Scheme("https", 443, ssf));
            return new DefaultHttpClient(mgr, base.getParams());
        } catch (Exception e) {
            log.warn("{}", e);
            return null;
        }
    }

httpclient jar包4.3之后版本获取HttpClient方法如下：

public static CloseableHttpClient getHttpClient() {
        try {
            SSLContext sslContext = SSLContext.getInstance("SSL");
            sslContext.init(null, new TrustManager[] {new X509TrustManager() {
                @Override
                public void checkClientTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {

                }

                @Override
                public void checkServerTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {

                }

                @Override
                public X509Certificate[] getAcceptedIssuers() {
                    return new X509Certificate[0];
                }
            }}, new SecureRandom());
            SSLConnectionSocketFactory socketFactory = new SSLConnectionSocketFactory(sslContext, NoopHostnameVerifier.INSTANCE);
            CloseableHttpClient closeableHttpClient = HttpClientBuilder.create().setSSLSocketFactory(socketFactory).build();
            return closeableHttpClient;
        } catch (Exception e) {
            log.warn("create closeable http client failed!");
            return HttpClientBuilder.create().build();
        }
    }