JAVA访问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();
        }
    }
}

JAVA访问URL