说说HttpClient的通信过程

1)生成请求对象(HttpGet get,HttpPost post)
2)生成客户端对象 HttpClient client
3)执行请求接收相应 HttpResponse response = client.execute(post)
HttpEntity entity = response.getEntity()
4)得到数据流
InputStream inputStream = entity.getContent();
5)最后关闭过期连接