java:URL

统一资源定位符:定位资源的,定位互联网上的某一个资源

DNS域名解析 www.baidu.com xxx.x…x…x

协议://ip地址:端口/项目名/资源

package lesson04;


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

public class UrlDown {
    public static void main(String[] args) throws Exception{
        //1.下载地址
        URL url = new URL("");//输入要下载的资源

        //2.连接到这个资源
        HttpURLConnection urlConnection =(HttpURLConnection) url.openConnection();
        InputStream inputStream = urlConnection.getInputStream();

        FileOutputStream fos = new FileOutputStream("Memories.m4a");

        byte[] buffer = new byte[1024];
        int len;
        while((len=inputStream.read(buffer))!=-1){
            fos.write(buffer,0, len);//写出这个数据
        }
        fos.close();
        inputStream.close();
        urlConnection.disconnect();//断开连接
    }
}