直接看代码：

package cn.itcast.crawler.test;

import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import java.io.IOException;

public class HttpPostTest {
    public static void main(String[] args)  {
        //1.创建HttpClient对象
          CloseableHttpClient httpClient= HttpClients.createDefault();
          //2.创建HttpPost对象，设置URL地址
        HttpPost httpPost=new HttpPost("http://www.itcast.cn");;
        //使用httpClient发起响应获取repsonse
        CloseableHttpResponse response=null;
        try {
            response=httpClient.execute(httpPost);
            //4.解析响应，获取数据
            //判断状态码是否是200
            if(response.getStatusLine().getStatusCode()==200){
                HttpEntity httpEntity=response.getEntity();
                String content=EntityUtils.toString(httpEntity,"utf8");
                System.out.println(content.length());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                response.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                httpClient.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
}
执行结果：

其实post请求和get请求在代码编写方面是非常相似的，只是一个是创建HttpPost对象，一个是创建HttpGet对象