获取页面url域名后内容

function getDomain(url) {
    const a = document.createElement('a');
    a.href = url;
    return a.hostname;
}

const url = 'https://www.example.com/path/to/page.html';
console.log(getDomain(url)); // 输出: www.example.com

from urllib.parse import urlparse

def get_domain(url):
    parsed_url = urlparse(url)
    return parsed_url.netloc

url = 'https://www.example.com/path/to/page.html'
print(get_domain(url))  # 输出: www.example.com

import java.net.URI;
import java.net.URISyntaxException;

public class Main {
    public static String getDomain(String url) {
        try {
            URI uri = new URI(url);
            String domain = uri.getHost();
            return domain != null ? domain : "";
        } catch (URISyntaxException e) {
            e.printStackTrace();
            return "";
        }
    }

    public static void main(String[] args) {
        String url = "https://www.example.com/path/to/page.html";
        System.out.println(getDomain(url));  // 输出: www.example.com
    }
}