通过java程序打开网页接受原码并进行数据爬取（链接方式）

URL url = new URL(
					"http://cloud.csdn.net/a/20120801/2808092.html");//将网址封装成URL对象
					URLConnection conn = url.openConnection();//打开网页链接
					InputStreamReader isr = new InputStreamReader(conn
							.getInputStream(), "utf-8");
					BufferedReader br = new BufferedReader(isr);
					String line = null;
					StringBuffer sb = new StringBuffer();
					while ((line = br.readLine()) != null) {
						sb.append(line);
					}