Detailed explanation of using HttpURLConnection to send data instances in java

This article mainly introduces the relevant information about a simple example of using HttpURLConnection to send data in java. Friends who need it can refer to it

java A simple example of using HttpURLConnection to send data

Each HttpURLConnection instance can be used to generate a single request, but other instances can transparently share the underlying network connection to the HTTP server. Calling the close() method on an HttpURLConnection's InputStream or OutputStream after a request releases the network resources associated with this instance but has no effect on the shared persistent connection. If the persistent connection is idle when disconnect() is called, the underlying socket may be closed. JAVA uses HttpURLConnection to send POST data in the form of OutputStream flow

Implementation code:

import java.io.*;
import java.net.*;

public class PostExample {
  public static void main(String[] argv) throws Exception {
     URL url = new URL("http://www.javacourses.com/cgi-bin/names.cgi");
     HttpURLConnection connection = (HttpURLConnection) url.openConnection();
     connection.setRequestMethod("POST");
     connection.setDoOutput(true);
     PrintWriter out = new PrintWriter(connection.getOutputStream());
    // encode the message
     String name = "name="+URLEncoder.encode("Qusay Mahmoud", "UTF-8");
     String email = "email="+URLEncoder.encode("qmahmoud@javacourses.com", "UTF-8");
    // send the encoded message
     out.println(name+"&"+email);
     out.close();
     BufferedReader in
       = new BufferedReader(new InputStreamReader(connection.getInputStream()));
     String line;
    while ((line = in.readLine()) != null) {
       System.out.println(line);
     }
     in.close();
   }
}

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