Java HttpURLConnection java.net.UnknownHostException [英] Java HttpURLConnection java.net.UnknownHostException

问题描述

URL url = new URL(urlStr);
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();

第二行抛出java.net.UnknownHostException. 我当时在公司的内部网络中，希望我可以帮助另一个也在同一内部网络中的人访问该网站，我只想从URL中读取内容并将其提供给客户端，有人在这方面有帮助吗?

The second line throws java.net.UnknownHostException. I was in a internal network in my company, and I hope I can help another one who's also in the same internal network with me to visit the website, and I just want to read content from the URL and give the content to the client side, is there any one help me on this?

推荐答案

公司通常会向外界提供代理服务器.尝试在代理中配置代理数据类，然后使用代理打开连接.

Companys normally have a proxy server to the outside world. Try to configure the proxy data in a Proxy class and open the connection with proxy.

Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(<ProxyUrl>,<ProxyPort>));
conn = new URL(urlString).openConnection(proxy);

如果您的代理具有密码验证，则必须在Authenticator中设置登录数据:

If your proxy has a passwort authentication you have to set the log in data in an Authenticator:

Authenticator authenticator = new Authenticator() 
{

    public PasswordAuthentication getPasswordAuthentication() 
    {
        return (new PasswordAuthentication(<ProxyUser>,<ProxyPW>.toCharArray()));
    }
};
Authenticator.setDefault(authenticator);

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