java+httpclient—— 一个稍微复杂的get请求

快来打我* 2023-10-03 17:01 35阅读 0赞

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
            
            
            
    
        }
    
    }

执行结果：

HTTP/1.1 200 OK  
HTTP/1.1  
200

Content-Type: text/html  
Content-Type: text/html  
Date: Sun, 03 May 2020 06:58:16 GMT

Key : Content-Type, , Value : text/html  
Key : Server, , Value : bfe  
Key : Date, , Value : Sun, 03 May 2020 06:58:16 GMT

===========================================================

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;
    
    public class jiekoumoni 
    {
    
        public static void main(String[] args) throws ClientProtocolException, IOException, Exception 
        {
        
            
            CloseableHttpClient client = HttpClients.createDefault();    //创建一个http客户端
            
            HttpGet httpGet = new HttpGet("http://httpbin.org/get");// 通过httpPost方式来实现我们的get请求
            
            httpGet.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36");//伪装成浏览器请求
            
            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
            
            
            //-----------------------------------------------------------------------
            
            
            System.out.println(httpGet.getMethod());   //get
            
            System.out.println(httpGet.getURI());    //http://httpbin.org/get
            
            //-----------------------------------------------------------------------
            
            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(header.getName()+":    "+ header.getValue());
            }
            
            
            
            //-----------------------------------------------------------------------
            
    
            
            Response.close();  // 关闭
            
            
            
    
        }
    
    }

执行结果：

HTTP/1.1 200 OK  
HTTP/1.1  
200

GET  
http://httpbin.org/get

Content-Type: application/json  
Content-Type: application/json  
Date: Sun, 03 May 2020 09:04:40 GMT

Date: Sun, 03 May 2020 09:04:40 GMT  
Content-Type: application/json  
Content-Length: 375  
Connection: keep-alive  
Server: gunicorn/19.9.0  
Access-Control-Allow-Origin: \*  
Access-Control-Allow-Credentials: true