httpclient4.0.1是一个客户端HTTP传输类库。HttpClient作用是传输和接收HTTP消息。-httpclient4.0.1 is a client-side HTTP transport library. HttpClient role is to transmit and receive HTTP messages.

基于HttpClient4.0的网络爬虫基本框架（Java实现）-Analog HTTP request: HttpClient 4.0 Target page structure analysis, HTTP request header information analysis: Firefox+ firebug/Chrome (F12 developer mode) HTML parsing: Jsoup