使用URL包而不是原始套接字检索网页

import java.io.*;

import java.net.*;


public class URLClient {
/*
来 自*
 时   代     Java  公  众  号 - nowjava.com
*/

    public static void main(String argv[]) throws Exception {

        URL u = new URL("http://nowjava.com");

        HttpURLConnection uC;

        int responseCode;

        InputStream input;

        BufferedReader remote;


        try {

            uC = (HttpURLConnection) u.openConnection();

            System.out.println("port " + u.getPort());

            responseCode = uC.getResponseCode();

        } catch (Exception ex) {

            throw new Exception("first : " + ex.getMessage());

        }

        /*
        时 代 J a v a - nowjava.com 提 供
        */

        if (responseCode != HttpURLConnection.HTTP_OK) {

            throw new Exception("HTTP response code : "

                    + String.valueOf(responseCode));

        }


        try {

            input = uC.getInputStream();

            remote = new BufferedReader(new InputStreamReader(input));


            String line = new String();


            // we will read and print a few lines only

            line = remote.readLine();

            System.out.println(line);


            line = remote.readLine();

            System.out.println(line);


            line = remote.readLine();

            System.out.println(line);


        } catch (Exception ex) {

            throw new Exception(ex.getMessage());

        }

        System.out.println(" host : " + u.getHost());

        System.out.println(" protocol : " + u.getProtocol());

        System.out.println(" port : " + u.getPort());

        System.out.println