我正在嘗試查看其中一個網頁的httpurlconnection

Question

嘗試檢查某個網頁中硒的損壞鏈接時，我無法收到響應消息。 我得到以下錯誤。

您能幫我解決問題的代碼是：

HttpURLConnection connection = (HttpURLConnection) new URL(activelinks.get(j).getAttribute("href")).openConnection();
connection.connect();
Serializable response = connection.getResponseMessage();
connection.disconnect();
System.out.println(activelinks.get(j).getAttribute("href")+"----->"+response);

錯誤是：

Exception in thread "main" java.net.ProtocolException: Server redirected too many  times (20)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at java.net.HttpURLConnection.getResponseCode(Unknown Source)
    at java.net.HttpURLConnection.getResponseMessage(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseMessage(Unknown Source)
    at Testng.amazonn.amazontestcase.main(amazontestcase.java:45)

Answer 1

如果您希望提取響應，則可以設置一個確定的連接超時，並在關閉連接之前按if()循環檢查響應，如下所示：

HttpURLConnection connection = (HttpURLConnection) new URL(activelinks.get(j).getAttribute("href")).openConnection();
connection.setConnectTimeout(5000);
connection.connect();
if (connection.getResponseCode() == 200) 
{
    System.out.println(activelinks.get(j).getAttribute("href")+"----->" + connection.getResponseMessage());
}

if (connection.getResponseCode() == httpUrlConnect.HTTP_NOT_FOUND) 
{
    System.out.println(activelinks.get(j).getAttribute("href")+"----->" + connection.HTTP_NOT_FOUND);
}