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>
)
