如何从 Java 代码调用 PHP 脚本？

正如标题所说...当用户单击 Java Swing 应用程序中的按钮时，我尝试使用以下代码执行 PHP 脚本：

URL url = new URL( "http://www.mywebsite.com/my_script.php" );
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.connect();

但什么也没发生...有什么不对 ？

我认为您错过了下一步，如下所示：

InputStream is = conn.getInputStream();

HttpURLConnection基本上只打开套接字connect为了做某事，你需要做一些事情，比如打电话getInputStream()或者更好getResponseCode()

URL url = new URL( "http://google.com/" );
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
if( conn.getResponseCode() == HttpURLConnection.HTTP_OK ){
    InputStream is = conn.getInputStream();
    // do something with the data here
}else{
    InputStream err = conn.getErrorStream();
    // err may have useful information.. but could be null see javadocs for more information
}