下载一首歌

package URLLoadDown;

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

public class LoadDown {
    public static void main(String[] args) {

        try {
            //1.下载地址
            URL url = new URL("https://audio04.dmhmusic.com/71_53_T10062028738_128_4_4_0_sdk-cpm/cn/0103/M00/78/CD/ChR45WFFlYmADtB8AAdWqAeDULU575.mp3?xcode=b4838506b4a317418f03fb92bf9f472e720ee1d");
            //2.连接到这个资源
            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
            InputStream inputStream = urlConnection.getInputStream();
            FileOutputStream fos = new FileOutputStream("575.mp3");
            byte[] buffer = new byte[512];
            int len;
            while((len=inputStream.read(buffer))!=-1){
                fos.write(buffer,0,len);
            }
            fos.close();
            inputStream.close();
            urlConnection.disconnect();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

注：方法从狂神说Java学得。