在Java中发送HTTP请求时的连接超时 [英] Connection Timeout When Sending HTTP Request in Java

问题描述

我正在使用下面这个简单的代码发送http请求：

I'm using this simple code below to send an http request:

import java.net.*;
import java.io.*;

public class URLConnectionReader {
 public static void main(String[] args) throws Exception {
    URL yahoo = new URL("http://www.yahoo.com/");
    URLConnection yc = yahoo.openConnection();
    BufferedReader in = new BufferedReader(
                            new InputStreamReader(
                            yc.getInputStream()));
    String inputLine;

    while ((inputLine = in.readLine()) != null) 
        System.out.println(inputLine);
    in.close();
 }
}

但它不起作用。我总是遇到同样的错误：

But it doesn't work. I've got always the same error:

 Exception in thread "main" java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(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 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 sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

我的操作系统：Windows 7.

我找不到问题出在哪里。
我没有互联网连接问题。
我已经尝试过关闭防火墙，但它没有解决问题。
我认为这不是一个网络问题，因为我有类似的c＃代码可行。

My OS: Windows 7.
I can't find where is the problem. I've no internet connection problem. I've already tried by getting off my firewall but It does not solve the problem. I think it's not a network problem because I've a similar c# code that works.

推荐答案

检查防火墙设置。

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