怎么这么简单的程序一直都提示connnection timeout？
import java.net.HttpURLConnection;
import java.net.URL;
public class AssureUploadSuccess {
public static void main(String []args){
try{
URL url = new URL("http://www.baidu.com");
HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
httpCon.setConnectTimeout(30000);
httpCon.setReadTimeout(30000);
httpCon.setDoOutput(true);
httpCon.setRequestMethod("POST");
httpCon.connect();
}catch(Exception e)
{
e.printStackTrace();
}
}
}
错误提示：
java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.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.plainConnect0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at AssureUploadSuccess.main(AssureUploadSuccess.java:25)
------解决思路----------------------
你没联网吧
------解决思路----------------------
可能还需要设置很多属性。找一个fiddler之类的工具，看看一个成功的request里面，有什么信息。然后照着塞到你的程序里
------解决思路----------------------
应该是内网无法直接访问外网，需要配置代理之类的东西
你可以使用抓包工具看看浏览器的动作，然后用程序来模拟就可以了