源码地址:https://github.com/apache/httpcomponents-client<br>
版本:tag rel/v4.5.3<br>
备注：
以下类的常量未改包名（老third包中也没有改）
com.fr.third.org.apache.http.impl.client.DefaultHttpClient 
com.fr.third.org.apache.http.impl.conn.DefaultClientConnection 
com.fr.third.org.apache.http.impl.conn.ManagedHttpClientConnectionFactory
com.fr.third.org.apache.http.impl.execchain.MinimalClientExec
com.fr.third.org.apache.http.impl.client.HttpClientBuilder