URL以及URLConnection对象

java中既然对ip地址都进行了对象的封装，那必须对URL对象进行封装

import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

public class URLDemo {

    public static void main(String[] args) throws Exception {
        
        //解析url中的数据，使用URL对象
        String str_url = "http://192.168.17.1:8080/myapp/font.html?name=lisi";
        
        URL url = new URL(str_url);
//        System.out.println("getProtocol:"+url.getProtocol());
//        System.out.println("getHost:"+url.getHost());
//        System.out.println("getPort:"+url.getPort());
//        System.out.println("getPath:"+url.getPath());
//        System.out.println("getFile:"+url.getFile());
//        System.out.println("getQuery:"+url.getQuery());
        
        //通过openConnection();获取到远程资源的连接对象
        URLConnection conn = url.openConnection();//内置Socket
        System.out.println(conn);
        
        //调用连接对象的读取方法，准备读取资源
        InputStream in = conn.getInputStream();
        byte[] buf = new byte[1024];
        int len = in.read(buf);
        String str = new String(buf,0,len);
        System.out.println(str);
        
    }

}