URL:统一资源定位器
协议
域名、计算机名
端口：默认80
资源(#为锚点)
http://www.baidu.com:80/index.html?uname=shsxt&age=18#a

public class http {public static void main(String[]args) throws MalformedURLException{ URL url =new URL("http://www.baidu.com:80/index.html?uname=shsxt&age=18#a"); //获取四个值 System.out.println("协议:"+url.getProtocol()); System.out.println("域名/ip:"+url.getHost()); System.out.println("端口:"+url.getPort()); System.out.println("请求资源:"+url.getFile()); System.out.println("请求资源:"+url.getPath()); //参数 System.out.println("参数:"+url.getQuery()); //锚点 System.out.println("锚点:"+url.getRef());}}