HttpComponents Client 4.5.4 已发布，修复了一些发现自 4.5.3 的问题。要注意的是需要 Java 1.6 及以上版本。更新内容如下：
[HTTPCLIENT-1883] SystemDefaultCredentialsProvider to use https.proxy* system properties for origins with port 443.
[HTTPCLIENT-1881] Allow truncated NTLM packets to work with this client.
[HTTPCLIENT-1855] Disabled caching of DIGEST auth scheme instances due to unreliability of nonce counter when the auth cache is shared by multiple sessions.
BasicCookieStore uses a ReentrantReadWriteLock to avoid synchronization on #getCookies/#toString while maintaining thread safety.
[HTTPCLIENT-1865] DefaultServiceUnavailableRetryStrategy does not respect HttpEntity#isRepeatable.
[HTTPCLIENT-1859] Encode Content-Disposition name and filename elements appropriately.
Avoid fetching the cached entity twice on cache hit.
[HTTPCLIENT-1835] #evictExpiredConnections no longer causes the #evictIdleConnections behaviour to be implicitly enabled.
[HTTPCLIENT-1831= URIBuilder should not prepend a leading slash to relative URIs.
[HTTPCLIENT-1833] Fix Windows Negotiate-NTLM handling of proxies.
[HTTPCLIENT-1817] Add a "Trust All" TrustStrategy implementation.
[HTTPCLIENT-1816] Update Apache Commons Codec 1.9 to 1.10.
[HTTPCLIENT-1836] DefaultHostnameVerifier#getSubjectAltNames(X509Certificate) throws java.lang.ClassCastException.
[HTTPCLIENT-1845]: Extract InputStreamFactory classes out of GzipDecompressingEntity and
DeflateDecompressingEntity for reuse and to create less garbage.
[HTTPCLIENT-1847] Update Ehcache from 2.6.9 to 2.6.11.
[HTTPCLIENT-1848] Update spymemcached from 2.11.4 to 2.12.3.
[HTTPCLIENT-1849] Update JNA from 4.1.0 to 4.4.0.
[HTTPCLIENT-1850] Update SLF4J from 1.7.6 to 1.7.25.
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引用来自“红薯”的评论
不就是 httpclient 吗