[英]unknown host exception
try {
{
long startTime = System.currentTimeMillis();
String source="s";
String source1="s";
URL google = new URL("http://google.com/");
HttpURLConnection yc =(HttpURLConnection)google.openConnection();
BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null) {
source=source.concat(inputLine);
}
in.close();
yc.disconnect();
}
long endTime1 = System.currentTimeMillis();
System.out.println("Total elapsed time in execution of method callMethod() is :"+ (endTime1-startTime));
}
}
when i tried the above through command prompt i got当我通过命令提示符尝试上述操作时,我得到了
java.net.UnknownHostException: google.com
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at ScagntJavaHttp.httpMakeRequest(ScagntJavaHttp.java:185)
at test.main(test.java:23)
Can any help me in resolving this one?任何人都可以帮助我解决这个问题吗?
Try removing http://
from your host url when you get java.net.UnknownHostException
and check your internet connection and the host exists (probably safe with google. . .)当您收到java.net.UnknownHostException
并检查您的互联网连接和主机是否存在时,尝试从您的主机 url 中删除http://
I believe it's a proxy problem.我相信这是一个代理问题。 Try to see if you have a proxy definition in your browser and then set it:尝试查看您的浏览器中是否有代理定义,然后进行设置:
ProxySelector.setDefault(new ProxySelector() {
@Override
public void connectFailed(URI uri, SocketAddress sa, IOException ioe) {
throw new RuntimeException("Proxy connect failed", ioe);
}
@Override
public List select(URI uri) {
return Arrays
.asList(new Proxy(Proxy.Type.HTTP,
new InetSocketAddress(proxyHost,
proxyPort)));
}
});
To see if you have proxy definition in IE, go to Tools - Internet Options -- Connections -- Lan Settings要查看IE中是否有代理定义,go到工具-Internet选项-连接-局域网设置
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.