Http Https 连接池

引用参考：
--Http请求连接池 - HttpClient 的 PoolingHttpClientConnectionManager
https://blog.csdn.net/catoop/article/details/50352334
--使用HttpClient4.5 PoolingHttpClientConnectionManager 提交Http请求
https://blog.csdn.net/nethackatschool/article/details/51965673

--httpclient源码分析之 PoolingHttpClientConnectionManager 获取连接
https://www.cnblogs.com/shoren/p/httpclient-leaseConnection.html
--连接池原理及一次连接时序图
http://ouqi.iteye.com/blog/1844284

--HttpClient4.5.2 连接池原理及注意事项
https://www.cnblogs.com/likaitai/p/5431246.html

--HttpClient 4.3连接池参数配置及源码解读
https://blog.csdn.net/umke888/article/details/54881946

--置TOMCAT及httpClient的keepalive以高效利用长连接
http://xls9577087.iteye.com/blog/2268698

--httpclient长链接与短链接
https://blog.csdn.net/yaoqinggg/article/details/51215021

--用httpclient必须知道的参数设置及代码写法、存在的风险
http://jinnianshilongnian.iteye.com/blog/2089792

--配置TOMCAT及httpClient的keepalive以高效利用长连接
http://blog.51cto.com/304076020/1563918
--http协议中的Connection=keepalive是什么意思
https://zhidao.baidu.com/question/461029629.html

--解决httpclient因为保持永久长连接造成连接吊死的问题
https://www.cnblogs.com/BensonHe/p/7612474.html

--当http连接池遇上keepalive
https://blog.csdn.net/hetaohappy/article/details/51851880?spm=5176.100239.blogcont57602.3.a0ehmo
--Http请求连接池 - HttpClient 的 PoolingHttpClientConnectionManager
https://blog.csdn.net/z69183787/article/details/79168079

【httpPost-httpGet】
--Httpclient的使用
https://blog.csdn.net/weixin_40144050/article/details/78964741

【https】
--使用HttpClient连接池进行https单双向验证
https://www.cnblogs.com/YDDMAX/p/5380131.html
--HttpClient4.3 关于https 中SSL证书请求问题
https://blog.csdn.net/sleeping_/article/details/50500351
--HttpClient 发送 HTTP、HTTPS 请求的简单封装
https://blog.csdn.net/happylee6688/article/details/47148227

https://www.cnblogs.com/jiaoyiping/p/5469660.html

--openssl搭建双向认证https
http://www.cnblogs.com/YDDMAX/p/5368404.html

--HttpClient详细实例，Httpclient调用https实例，避免https SSL认证
https://blog.csdn.net/dcb_ripple/article/details/51012648
--HTTP 和HTTPS
https://blog.csdn.net/angussl/article/details/5557738