在 Java 中使用 HttpURLConnection 时连接被拒绝

Question

我在本地主机上使用 WAMP 服务器，我有一个小型 Java 软件可以从 PHP 文件获取响应。当我尝试从 HttpURLConnection 对象获取 InputStream 时出现以下错误（当我尝试获取 responseCode 或 responseMessage 时...）。请帮助我。

错误信息：

Exception in thread "main" java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.connect0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at java.net.Socket.connect(Socket.java:538)
    at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
    at sun.net.www.http.HttpClient.New(HttpClient.java:308)
    at sun.net.www.http.HttpClient.New(HttpClient.java:326)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1202)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1138)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1032)
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:966)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1546)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
    at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:480)
    at javaapplication1.JavaApplication1.main(JavaApplication1.java:28)
C:\Users\Amine\AppData\Local\NetBeans\Cache.2\executor-snippets\run.xml:53: Java returned: 1

Java代码：

public static void main(String[] args) throws MalformedURLException, IOException 
{
    URL url = new URL("http://localhost/test/test.php");
    HttpURLConnection con  = (HttpURLConnection) url.openConnection();
    System.out.println(con.getResponseCode());
}

PHP 脚本 (C:\wamp\www\test\test.php):

<?php echo "Hello world"; ?>

Answer 1

检查您的防火墙设置。

浏览器似乎允许连接到 localhost:80，但您的 java 应用程序已禁用。

Answer 2

好的，我已经解决了问题，它与 wamp 服务器有关。我删除了它然后我重新安装了它。现在可以正常使用了。

在 Java 中使用 HttpURLConnection 时连接被拒绝

Connection refused when using HttpURLConnection in Java

java

wamp

httpurlconnection