Java-Http

Posted 2021-01-11 为你编程

 1 import java.io.BufferedReader;
 2 import java.io.IOException;
 3 import java.io.InputStreamReader;
 4 import java.net.MalformedURLException;
 5 import java.net.URL;
 6 import java.net.URLConnection;
 7 
 8 /**
 9  * URLConnection

 1 import java.io.BufferedReader;
 2 import java.io.BufferedWriter;
 3 import java.io.IOException;
 4 import java.io.InputStreamReader;
 5 import java.io.OutputStreamWriter;
 6 import java.net.HttpURLConnection;
 7 import java.net.MalformedURLException;
 8 import java.net.URL;
 9 
10 /**
11  * HttpURLConnection
12  */
13 public class TestPost {
14     public static void main(String[] args) {
15         try {
16             URL url = new URL("");
17             HttpURLConnection connection =   (HttpURLConnection) url.openConnection();
18             connection.setRequestProperty("encoding", "UTF-8");
19             connection.setRequestMethod("POST");
20             connection.setDoInput(true);
21             connection.setDoOutput(true);
22             //根据连接对象创建输出流   将参数写入
23             BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(connection.getOutputStream()));
24             bw.write("name=zhangsan&age=25");
25             bw.flush();
26             //创建输入流  获取响应数据
27             BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
28             String str;
29             StringBuffer sb = new StringBuffer();
30             while((str = br.readLine())!=null) {
31                 sb.append(str);
32             }
33             bw.close();
34             br.close();
35         } catch (MalformedURLException e) {
36             e.printStackTrace();
37         } catch (IOException e) {
38             e.printStackTrace();
39         }
40     }
41 }

 

10  */
11 public class TestGet {
12     public static void main(String[] args) {
13         try {
14             URL url = new URL("https://www.baidu.com");
15             //打开连接
16             URLConnection openConnection = url.openConnection();
17             //获取连接中的输入流openConnection.getInputStream()返回字节流，通过转成字符流并包装一个缓冲流
18             BufferedReader br = new BufferedReader(
19                     new InputStreamReader(openConnection.getInputStream()));
20             String str;
21             StringBuffer sb = new StringBuffer();
22             while((str = br.readLine())!=null) {
23                 sb.append(str);
24             }
25             System.out.println(sb);
26             br.close();
27         } catch (MalformedURLException e) {
28             e.printStackTrace();
29         } catch (IOException e) {
30             e.printStackTrace();
31         }
32     }
33 }

 1 import java.io.IOException;
 2 import org.apache.http.HttpEntity;
 3 import org.apache.http.HttpResponse;
 4 import org.apache.http.client.ClientProtocolException;
 5 import org.apache.http.client.HttpClient;
 6 import org.apache.http.client.methods.HttpGet;
 7 import org.apache.http.impl.client.HttpClients;
 8 import org.apache.http.util.EntityUtils;
 9 
10 /**
11  * HttpGet
12  */
13 public class HttpClientGetTest {
14     public static void main(String[] args) {
15         HttpClient client = HttpClients.createDefault();
16         try {
17             HttpGet get = new HttpGet("http://www.baidu.com");
18             HttpResponse response = client.execute(get);
19             HttpEntity entity = response.getEntity();
20             String result = EntityUtils.toString(entity,"UTF-8");
21             
22             System.out.println(result);
23         } catch (ClientProtocolException e) {
24             e.printStackTrace();
25         } catch (IOException e) {
26             e.printStackTrace();
27         }
28     }
29 }

 1 import java.io.IOException;
 2 import java.util.ArrayList;
 3 import java.util.List;
 4 
 5 import org.apache.http.HttpEntity;
 6 import org.apache.http.HttpResponse;
 7 import org.apache.http.client.ClientProtocolException;
 8 import org.apache.http.client.HttpClient;
 9 import org.apache.http.client.entity.UrlEncodedFormEntity;
10 import org.apache.http.client.methods.HttpPost;
11 import org.apache.http.impl.client.HttpClients;
12 import org.apache.http.message.BasicNameValuePair;
13 import org.apache.http.util.EntityUtils;
14 
15 /**
16  * HttpPost
17  */
18 public class HttpClientPostTest {
19     public static void main(String[] args) {
20         try {
21             HttpClient client = HttpClients.createDefault();
22             HttpPost post = new HttpPost("http://www.baidu.com");
23             //参数集合
24             List<BasicNameValuePair> parameters = new ArrayList<BasicNameValuePair>();
25             //添加数据
26             parameters.add(new BasicNameValuePair("name", "zhangsan"));
27             //将参数放到实体中
28             post.setEntity(new UrlEncodedFormEntity(parameters));
29             //设置请求方式
30             HttpResponse response = client.execute(post);
31             HttpEntity entity = response.getEntity();
32             String result = EntityUtils.toString(entity,"UTF-8");
33             //打印响应信息
34             System.out.println(result);
35         } catch (ClientProtocolException e) {
36             e.printStackTrace();
37         } catch (IOException e) {
38             e.printStackTrace();
39         }
40     }
41 }