Java中的http相关的库：httpclient/httpcore/okhttp/http-request

httpclient/httpcore是apache下面的项目：中文文档下载参考 5

官网：http://hc.apache.org/

在线文档：http://hc.apache.org/httpcomponents-client-ga/tutorial/html/

示例代码：http://hc.apache.org/httpcomponents-client-ga/examples.html

异步版本：http://hc.apache.org/httpcomponents-asyncclient-dev/index.html

参考：

1、https://www.crifan.com/java_http_related_lib_httpclient_httpcore/

2、https://www.ibm.com/developerworks/cn/java/j-lo-okhttp/index.html

3、https://www.jianshu.com/p/b2057bcf512d

4、https://www.jianshu.com/p/e955b01e2e16

5、https://code.google.com/archive/p/translation/downloads