java - 从 url 获取 http 响应代码

Question

我想编写一个 Java 程序，它将访问 URL 并打印状态代码(即 200、404 等)。我正在使用 HttpUrlConnection api 执行此操作，但它只显示异常，不打印状态代码。

URL url = new URL("https://abc.com/test.html");
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("GET");
connection.connect();

int code = connection.getResponseCode();  
System.out.println("code: "+code);

Answer 1

我试过你的代码如下，对我来说效果很好:

import java.net.*;

public class Action 
{

    public static void main(String[] args)
    {
        try
        {
            URL url = new URL("http://localhost:8888");
            HttpURLConnection connection = (HttpURLConnection)url.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();

            int code = connection.getResponseCode();  
            System.out.println("code: "+code);
        }
        catch(Exception e)
        {

        }

    }
}

也与谷歌。