简单的java网络爬虫

注释都尽可能的写好一点了
需要用到的知识包含java网络编程（http这一块）和I/O流编程
直接上代码：

package com.org.socket;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;

public class HttpTest {
	public static void main(String[] args) {
		BufferedReader br =null;
		//定义URL
		String url2="http://www.baidu.com";
		try {
			URL url =new URL(url2);
			//建立连接
			URLConnection connection = url.openConnection();
			//打开输入流通道，获取网页数据
			InputStream inputStream = connection.getInputStream();
			//建立缓冲读取数据
			br = new BufferedReader(new InputStreamReader(inputStream, "UTF-8"));
			String line =null;
			//建立输出流，用以将数据输出到文件里
			BufferedWriter writer =new BufferedWriter(new OutputStreamWriter(new FileOutputStream(new File("d:/java_/text.txt")), "UTF-8"));
			while((line=br.readLine())!=null) {
				writer.write(line);
				writer.newLine();
				//若是把内容打印到控制台，
				System.out.println(line);
			}
			writer.close();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			try {
				br.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

}