JAVA訪问URL：

package Test;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.URI;

import java.net.URISyntaxException;

import java.net.URL;

import java.net.URLConnection;

import java.awt.Desktop;

public class URLTest {

    public static void main(String[] args) {

		String urlStr = "http://www.baidu.com";

		URL url;

		try {

		    url = new URL(urlStr);

		    URLConnection URLconnection = url.openConnection();

		    HttpURLConnection httpConnection = (HttpURLConnection)URLconnection;

		    int responseCode = httpConnection.getResponseCode();

		    if (responseCode == HttpURLConnection.HTTP_OK) {

		        System.err.println("成功");

		        InputStream urlStream = httpConnection.getInputStream();

		        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlStream));

		        String sCurrentLine = "";

		        String sTotalString = "";

		        while ((sCurrentLine = bufferedReader.readLine()) != null) {

		            sTotalString += sCurrentLine;

		        }

		        System.err.println(sTotalString);

		        runBroswer(urlStr);

		    }else{

		        System.err.println("失败");

		     }

		} catch (Exception e) {

		    e.printStackTrace();

		}  

    }

    public static void runBroswer(String webSite) {

        try {

            Desktop desktop = Desktop.getDesktop();

            if (desktop.isDesktopSupported() && desktop.isSupported(Desktop.Action.BROWSE)) {

                URI uri = new URI(webSite);

                desktop.browse(uri);

            }

        } catch (IOException ex) {

            ex.printStackTrace();

        } catch (URISyntaxException ex) {

            ex.printStackTrace();

        }

    }

}