Java访问url

 try {
                URL url = new URL("http://baiduu.com");
                InputStream in =url.openStream();
                InputStreamReader isr = new InputStreamReader(in);
                BufferedReader bufr = new BufferedReader(isr);
                String str;
                while ((str = bufr.readLine()) != null) {
                    System.out.println(str);
                }
                bufr.close();
                isr.close();
                in.close();
                Thread.sleep(100);
            } catch (Exception e) {
                e.printStackTrace();
            }