Java Struts - Dead Link Checker

我需要檢查一組Intranet站點。我試圖使用下面的代碼。（剛剛通過在互聯網上隨機搜索獲得此代碼）。我在我的行動課上調用了這個方法。但是進入例外部分的大多數網站。即使我能夠從我的瀏覽器打開這些網站，我也獲得了協議例外和UnknownHostException。Java Struts - Dead Link Checker

代碼以供參考：

public boolean isLive(String link) { 
    HttpURLConnection urlConnection = null; 
    try { 
    URL url = new URL(link); 
    urlConnection = (HttpURLConnection) url.openConnection(); 
    urlConnection.setRequestMethod("HEAD"); 
    urlConnection.setConnectTimeout(5000); /* timeout after 5s if can't connect */ 
    urlConnection.setReadTimeout(5000); /* timeout after 5s if the page is too slow */ 
    urlConnection.connect(); 
    String redirectLink = urlConnection.getHeaderField("Location"); 
    if (redirectLink != null && !link.equals(redirectLink)) { 
     return isLive(redirectLink); 
    } else { 
     return urlConnection.getResponseCode() == HttpURLConnection.HTTP_OK; 
    } 
    } catch (Exception e) { 
    return false; 
    } finally { 
    if (urlConnection != null) { 
     urlConnection.disconnect(); 
    } 
    } 
}

來源

2011-10-23 Hari Priya Jagannathan