解决方案是:
SSLContext sslContext = SSLContexts.custom()
.useTLS()
.build();
SSLConnectionSocketFactory f = new SSLConnectionSocketFactory(
sslContext,
new String[]{"TLSv1", "TLSv1.1"},
null,
BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);
httpClient = HttpClients.custom()
.setSSLSocketFactory(f)
.build();
不过,这需要org.apache.httpcomponents.httpclient4.3.x。