通过连接验证网址

import java.io.BufferedReader;/** n o w    j a v a  . c o m 提 供 **/

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URL;

import java.net.URLConnection;

import org.apache.log4j.Logger;


public class Main{

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

        String checkURL = "nowjava.com";

        System.out.println(validateURL(checkURL));

    }

    private static final String SORRY_PAGE = "Sorry, the page you requested was not found";
    /* 
    *来 自
     n o w j a v a . c o m - 时代Java
    */

    private static Logger log = Logger.getLogger(CommonUtils.class

            .getName());

    /**

     * @param checkURL

     * @return

     */

    public static boolean validateURL(String checkURL) {

        try {

            URL url = new URL(checkURL);

            URLConnection connection = url.openConnection();

            connection.connect();

            if (connection instanceof HttpURLConnection) {

                HttpURLConnection httpConnection = (HttpURLConnection) connection;

                httpConnection.setConnectTimeout(500);

                int code = httpConnection.getResponseCode();

                String pageContents = getPageContents(connection);


                if (((code == 200 || code == 301 || code == 302 || code == 403))) {

                    if (!pageContents.contains(SORRY_PAGE)) { //&& (!pageContents.contains(SEARCH_PAGE))) {

                        return true;

                    } else {

                        log.error("Redirected to yahoo search page "

                                + checkURL);

                        return false;

                    }

                } else {

                    log.error(checkURL + " returned - " + code);

                    return false;

                }

            } else {

                log.error("error - not a http request!");

                return false;

            }

        } catch (Exception e) {

            log.error("Validation failed " + e.getMessage());

            return false;

        }

    }

    /**

     * @param connection

     * @return

     * @throws IOException

     */

    public static