这是代码的重构，应重试下载
N时间。虽然尚未进行测试，但是它应该向正确的方向发展。
public static String getPage(String theURL) { URL url = null; try { url = new URL(theURL); } catch (MalformedURLException e) { e.printStackTrace(); exitprint(); } for (int i = 0; i < N; i++) { try { InputStream is = url.openStream(); int ptr = 0; StringBuffer buffer = new StringBuffer(); while ((ptr = is.read()) != -1) buffer.append((char)ptr); } catch (IOException e) { continue; } return buffer.toString(); } throw new SomeException("Failed to download after " + N + " attepmts");}
