java/Crawler/exception/NetworkException.java

package exception;

public class NetworkException extends CrawlerException {
    public NetworkException(String message) {
        super(message);
    }

    public NetworkException(String message, Throwable cause) {
        super(message, cause);
    }

    public static NetworkException connectionFailed(String host) {
        return new NetworkException("网络连接失败，无法访问: " + host,
            new java.net.ConnectException("Connection refused"));
    }

    public static NetworkException unknownHost(String host) {
        return new NetworkException("无法解析域名: " + host,
            new java.net.UnknownHostException(host));
    }

    public static NetworkException timeout(String host) {
        return new NetworkException("请求超时，无法访问: " + host,
            new java.net.SocketTimeoutException("Read timed out"));
    }
}