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. 下载地址： http://hc.apache.org/downloads.cgi HttpComponents Client 4.5.4，Java 的 HTTP 协议库下载地址
