通过url地址抓取html代码

public class URLStream {
	public static void main(String[] args) throws IOException {
		InputStream inputStream = null;
		BufferedReader reader = null;
		String str = null;
		try {
			URL url = new URL("http://www.baidu.com");
			
			inputStream = url.openStream();
			 reader = new BufferedReader(new InputStreamReader(inputStream,"gbk"));
			while(null != (str = reader.readLine())) {
				System.out.println(str);
			}
			reader.close();
		} catch (MalformedURLException ex) {
		     System.err.println("Not a URL Java understands.");
		} finally {
			if (reader != null)
				reader.close();
		}
	}
}

其他：
     1.刚开始写的时候没有用while(null != (str = reader.readLine()))而是用
     for( int c = inputStream.read(); c != -1; c = inputStream.read()){
                System.out.write(c);
     }
     发现乱码，想想当然会乱码的，毕竟一个中文占两个字符。