下载网易云音乐里面的歌曲或者歌单的封面到本地

Cover.java

import java.io.BufferedInputStream;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;
import java.nio.file.Files;
import java.nio.file.Paths;

//下载网易云音乐里面歌曲或者歌单的封面到本地
public class Cover {
    public static String urlAddress = "http://music.163.com/#/user/home?id=123293344";
    public static String dirPath= "E:/封面";
    public static void main(String[] args) throws IOException {
        String urltemp="";
        for (String string : urlAddress.split("/#")) {
            urltemp+=string;
        }
        URL url = new URL(urltemp);
        URLConnection conn = url.openConnection();
        BufferedInputStream in = new BufferedInputStream(conn.getInputStream());
        byte[] buff = new byte[1024];
        int len = -1;
        StringBuilder str = new StringBuilder();
        while((len=in.read(buff))!=-1)
        {
            str.append(new String(buff, 0, len));
        }
        int start=0;
        int end = 0;
        if(urlAddress.indexOf("/user")!=-1)
        {
            start=str.indexOf("src=\"", str.indexOf("id=\"ava\""))+5;
            end = str.indexOf("?", start);
        }
        else
        {
            start=str.indexOf("src=\"", str.indexOf("u-cover"))+5;
            end = str.indexOf("?", start);
        }
        String u = str.substring(start, end);
        System.out.println(u);
        url = new URL(u);
        conn = url.openConnection();
        File dirFile = new File(dirPath);
        if(!dirFile.exists())
        {
            dirFile.mkdirs();
        }
        File imgFile = new File(dirFile.getPath()+File.separator+u.substring(u.lastIndexOf("/")+1, u.length()));
        if(imgFile.exists())
        {
            imgFile.delete();
        }
        Files.copy(conn.getInputStream(), Paths.get(imgFile.getPath()));
    }
}