"java 网络编程"简单总结

package com.shengshiyuan.network;

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

public class UrlConnection1 {
	public static void main(String[] args) throws Exception {
		URL url = new URL("http://www.infoq.com");

		URLConnection conn = url.openConnection();

		InputStream is = conn.getInputStream();

		OutputStream os = new FileOutputStream("c:\\infoq.txt");

		byte[] buffer = new byte[1024];

		int length = 0;

		while (-1 != (length = is.read(buffer, 0, buffer.length))) {
			os.write(buffer, 0, length);
		}

		is.close();
		os.close();
	}
}

package com.shengshiyuan.network;

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

public class UrlConnection2 {
	public static void main(String[] args) throws Exception {
		URL url = new URL("http://www.qq.com");

		// URLConnection conn = url.openConnection();
		//
		// InputStream is = conn.getInputStream();
		// 更简单的方式
		InputStream is = url.openStream();

		OutputStream os = new FileOutputStream("c:\\infoq.txt");

		byte[] buffer = new byte[1024];

		int length = 0;

		while (-1 != (length = is.read(buffer, 0, buffer.length))) {
			os.write(buffer, 0, length);
		}

		is.close();
		os.close();
	}
}

具体详细讲解课件见附件（上课讲解用pdf文件）：