java+httpclient—-稍微复杂的get请求

package jkcs;

import java.io.IOException;

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

public class jiekoumoni 
{

    public static void main(String[] args) throws ClientProtocolException, IOException 
    {
    
        
        CloseableHttpClient client = HttpClients.createDefault();    //创建一个http客户端
        
        
        
        HttpGet httpGet = new HttpGet("http://www.baidu.com"); // 通过httpget方式来实现我们的get请求
        
        
        
        
        CloseableHttpResponse Response = client.execute(httpGet);  // 通过client调用execute方法，得到我们的执行结果就是一个response，所有的数据都封装在response里面了
        
        
        //-----------------------------------------------------------------------

        
        System.out.println(Response.getStatusLine());  //HTTP/1.1 200 OK
        
        System.out.println(Response.getProtocolVersion());  //HTTP/1.1
        
        System.out.println(Response.getStatusLine().getStatusCode());  //200
        
        
        //-----------------------------------------------------------------------
        
        
        
        HttpEntity httpEntity = Response.getEntity();         //获取某个固定的响应头
        
        System.out.println(httpEntity.getContentType()); //Content-Type: text/html
        
        

        
        
        //-----------------------------------------------------------------------
        
        
        System.out.println(Response.getFirstHeader("Content-Type"));//Content-Type: text/html
        System.out.println(Response.getFirstHeader("Date"));   //Date: Sun, 03 May 2020 06:58:16 GMT
        
        //-----------------------------------------------------------------------
        
        Header[] headers = Response.getAllHeaders();    //获取所有响应头
        for (Header header : headers) 
        {
           System.out.println("Key : " + header.getName()+",         ," +" Value : " + header.getValue());
        }
        
        
        
        //-----------------------------------------------------------------------
        
        
        Response.close();  // 关闭
        
        
        

    }

}