Código: Seleccionar todo

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

public class MainClass {
    public static void main(String args[]) {
        URL u;
        URLConnection uc;
        String header;
        String nextLine; 

        URLConnection urlConn = null; 
        InputStreamReader  inStream = null; 
        BufferedReader buff = null; 

        try {
            u = new URL("http://java.sun.com/jdc");
            URLConnection connection = u.openConnection();

            connection.connect();

            

            // Cast to a HttpURLConnection
            if ( connection instanceof HttpURLConnection)
            {
                HttpURLConnection httpConnection = (HttpURLConnection) connection;

                int code = httpConnection.getResponseCode();

                
                
                System.out.println(code);
                // do something with code .....
            }
            else
            {
                System.err.println ("error - not a http request!");
            }
            uc = u.openConnection();
            for (int j = 1;; j++) {
                header = uc.getHeaderField(j);
                if (header == null)
                    break;
                System.out.println(uc.getHeaderFieldKey(j) + " " + header);
            }

            // Create the URL obect that points 
            // at the default file index.html 

            urlConn = u.openConnection(); 
            inStream = new InputStreamReader( 
                urlConn.getInputStream()); 
            buff= new BufferedReader(inStream); 

            // Read and print the lines from index.html 
            while (true){ 
                nextLine =buff.readLine(); 
                if (nextLine !=null){ 
                    System.out.println(nextLine); 
                } 
                else{ 
                    break; 
                } 
            } 

        } catch (MalformedURLException e) {
            System.err.println("not a URL I understand.");
        } catch (IOException e) {
            System.err.println(e);
        }
    }

}

           

Código: Seleccionar todo

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

public class mich
{
    public static void main(String args[]) {
        URL u;
        URLConnection uc;
        String header;
        String nextLine; 

        URLConnection urlConn = null; 
        InputStreamReader  inStream = null; 
        BufferedReader buff = null; 

        try {
            u = new URL("http://java.sun.com/jdc");
            URLConnection connection = u.openConnection();

            connection.connect();

            

            // Cast to a HttpURLConnection
            if ( connection instanceof HttpURLConnection)
            {
                HttpURLConnection httpConnection = (HttpURLConnection) connection;
//Por default este método tiene true, lo que hace que se redirige automáticamente a la pagina. La cual te regresa 200. Si lo apagamos entonces nos regresa el status de la pagina solicitada
httpConnection.setInstanceFollowRedirects(false);
                int code = httpConnection.getResponseCode();

                
                
                System.out.println(code);
                // do something with code .....
            }
            else
            {
                System.err.println ("error - not a http request!");
            }
            uc = u.openConnection();
            for (int j = 1;; j++) {
                header = uc.getHeaderField(j);
                if (header == null)
                    break;
                System.out.println(uc.getHeaderFieldKey(j) + " " + header);
            }

            // Create the URL obect that points 
            // at the default file index.html 

            urlConn = u.openConnection(); 
            inStream = new InputStreamReader( 
                urlConn.getInputStream()); 
            buff= new BufferedReader(inStream); 

            // Read and print the lines from index.html 
            while (true){ 
                nextLine =buff.readLine(); 
                if (nextLine !=null){ 
                    System.out.println(nextLine); 
                } 
                else{ 
                    break; 
                } 
            } 

        } catch (MalformedURLException e) {
            System.err.println("not a URL I understand.");
        } catch (IOException e) {
            System.err.println(e);
        }
    }

}