你需要使用自己的TrustManager创建SSLContext并使用此上下文创建HTTPS方案。这是代码，

SSLContext sslContext = SSLContext.getInstance("SSL");

// set up a TrustManager that trusts everything
sslContext.init(null, new TrustManager[] { new X509TrustManager() {
            public X509Certificate[] getAcceptedIssuers() {
                    System.out.println("getAcceptedIssuers =============");
                    return null;
            }

            public void checkClientTrusted(X509Certificate[] certs,
                            String authType) {
                    System.out.println("checkClientTrusted =============");
            }

            public void checkServerTrusted(X509Certificate[] certs,
                            String authType) {
                    System.out.println("checkServerTrusted =============");
            }
} }, new SecureRandom());

SSLSocketFactory sf = new SSLSocketFactory(sslContext);
Scheme httpsScheme = new Scheme("https", 443, sf);
SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(httpsScheme);

// apache HttpClient version >4.2 should use BasicClientConnectionManager
ClientConnectionManager cm = new SingleClientConnManager(schemeRegistry);
HttpClient httpClient = new DefaultHttpClient(cm);

其他所有答案均已弃用或不适用于HttpClient 4.3。

这是构建http客户端时允许所有主机名的一种方法。

CloseableHttpClient httpClient = HttpClients
    .custom()
    .setHostnameVerifier(AllowAllHostnameVerifier.INSTANCE)
    .build();

或者，如果你使用的是版本4.4或更高版本，则更新后的调用如下所示：

CloseableHttpClient httpClient = HttpClients
    .custom()
    .setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE)
    .build();