java网络编程2

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package com.laili.netUrl;

import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.net.URLConnection;

public class TestUrl
{
	public static void main(String[] args) throws Exception
	{
		String urlString = "http://www.baidu.com";
		String urlString2 = "http://www.google.com.cn";
		String urlString3 = "http://android.developers.com";
		String urlString4 = "http://www.sina.com";
		URL url =  new URL(urlString4);
		
		String protocol = url.getProtocol();
		String host = url.getHost();
		int port = url.getPort();
		String file = url.getFile();
		System.out.println("protocol: " + protocol + "\n" + "host: " + host);
		System.out.println("port: " + port + "\n" + "file: " + file);
		
		URLConnection urlConn = url.openConnection();
		InputStream is = urlConn.getInputStream();
		OutputStream os = new FileOutputStream("d:/android.html");
		
		byte[] buffer = new byte[1024];
		int len;
		while((len = is.read(buffer, 0, buffer.length)) != -1)
		{
			os.write(buffer, 0, len);
		}
		
		is.close();
		os.close();
	}
}