maven 仓库地址：

https://repo.maven.apache.org/maven2/

org.apache.commons.httpclient

   <dependency><groupId>commons-httpclient</groupId><artifactId>commons-httpclient</artifactId><version>3.1</version></dependency>

org.apache.http

		<dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.2</version></dependency><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpcore</artifactId><version>4.4.5</version></dependency>

org.apache.http.nio

   <dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpcore-nio</artifactId><version>4.4.9</version></dependency>

org.apache.http.nio.client
org.apache.http.impl.nio.client

 <dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpasyncclient</artifactId><version>4.1.2</version></dependency>