java爬取并下载酷狗TOP500歌曲的方法

是这样的，之前买车送的垃圾记录仪不能用了，这两天狠心买了好点的记录仪，带导航、音乐、蓝牙、4g等功能，寻思，既然有这些功能就利用起来，用4g听歌有点奢侈，就准备去酷狗下点歌听，居然都是需要办会员才能下载，而且vip一月只能下载300首，我这么穷又这么抠怎么可能冲会员，于是百度搜了下怎么免费下载，都是python爬取，虽然也会一点，但是电脑上没安装python，再安装再研究感觉有点费劲，于是就花了半小时做了这个爬虫，技术一般，只记录分析实现过程，大牛请绕行。其中用到了一些库，包括：jsoup、httpclient、net.sf.json大家可以自行去下载jar包

1、分析是否能获得top500歌单

首先，打开酷狗首页查看酷狗top500，说好的500首，怎么就只有22首呢，

是真的只让看这些还是能找到其余的呢，于是我就看了下这top500的链接

https://www.kugou.com/yy/rank/home/1-8888.html?from=rank

可以看的出home后边有个1，难道这是代表第一页的意思？于是我就把1改成2，进入，果然进入了第二页，至此可以知道我们可以在网页里获取这500首的歌单。

2.分析找到真正的mp3下载地址（这个有点绕）

点一个歌曲进入播放页面，使用谷歌浏览器的控制台的elements，搜一下mp3，很轻松就定位到了mp3的位置，

但是使用java访问的时候爬取的html里却没有该mp3的文件地址，那么这肯定是在该页面的位置使用了js来加载mp3，那么刷新下网页，看网页加载了哪些东西，加载的东西有点多，着重看一下js、php的请求，主要是看里面有没有mp3的地址，分析细节就不用说了，

最终我在列表的

https://wwwapi.kugou.com/yy/index.php?r=play/getdata&callback=jquery191027067069941080546_1546235744250&hash=667939c6e784265d541deee65ae4f2f8&album_id=0&_=1546235744251

这个请求里发现了mp3的完整地址，

"play_url": "http://fs.w.kugou.com/201812311325/dcf5b6449160903c6ee48035e11434bb/g128/m08/02/09/iicbafrzqf2anoadadn94ubomau995.mp3",

那这个js是怎么判断是哪首歌的呢，那么只可能是hash这个参数来决定歌曲的，然后到播放页面里找到这个hash的位置，是在下面的js里

var datafromsmarty = [{"hash":"667939c6e784265d541deee65ae4f2f8","timelength":"237051","audio_name":"u767du5c0fu767d - u6700u7f8eu5a5au793c","author_name":"u767du5c0fu767d","song_name":"u6700u7f8eu5a5au793c","album_id":0}],//当前页面歌曲信息
      playtype = "search_single";//当前播放
  </script>

在去java爬取该网页，查看能否爬到这个hash，果然，爬取的html里有这段js，到现在mp3的地址也找到了，歌单也找到了，那么下一步就用程序实现就可以了。

3.java实现爬取酷狗mp3

先看一下爬取结果

找到了资源，程序实现就好说了，其中使用到了自己写的几个工具类，自己整理点自己的工具类还是有好处的，以后遇到什么问题就没必要重新写了，直接拿来用就可以了。没什么好说的了，下面直接贴出源码

spiderkugou.java

1. package com.bing.spider; 
2.  
3. import java.io.ioexception; 
4. import java.util.regex.matcher; 
5. import java.util.regex.pattern; 
6.  
7. import org.jsoup.nodes.document; 
8. import org.jsoup.nodes.element; 
9. import org.jsoup.select.elements; 
10.  
11. import com.bing.download.filedownload; 
12. import com.bing.html.htmlmanage; 
13. import com.bing.http.httpgetconnect; 
14.  
15. import net.sf.json.jsonobject; 
16.  
17. public class spiderkugou { 
18.  
19.     public static string filepath = "f:/music/"; 
20.     public static string mp3 = "https://wwwapi.kugou.com/yy/index.php?r=play/getdata&callback=jquery191027067069941080546_1546235744250&" 
21.             + "hash=hash&album_id=0&_=time"; 
22.      
23.     public static string link = "https://www.kugou.com/yy/rank/home/page-8888.html?from=rank"; 
24.     //"https://www.kugou.com/yy/rank/home/page-23784.html?from=rank"; 
25.      
26.      
27.     public static void main(string[] args) throws ioexception { 
28.          
29.         for(int i = 1 ; i < 23 ; i++){ 
30.             string url = link.replace("page", i + ""); 
31.             gettitle(url); 
32.             //download("https://www.kugou.com/song/mfy6je5.html"); 
33.         } 
34.     } 
35.      
36.     public static string gettitle(string url) throws ioexception{ 
37.         httpgetconnect connect = new httpgetconnect(); 
38.         string content = connect.connect(url, "utf-8"); 
39.         htmlmanage html = new htmlmanage(); 
40.         document doc = html.manage(content); 
41.         element ele = doc.getelementsbyclass("pc_temp_songlist").get(0); 
42.         elements eles = ele.getelementsbytag("li"); 
43.         for(int i = 0 ; i < eles.size() ; i++){ 
44.             element item = eles.get(i); 
45.             string title = item.attr("title").trim(); 
46.             string link = item.getelementsbytag("a").first().attr("href"); 
47.              
48.             download(link,title); 
49.         } 
50.         return null; 
51.     } 
52.      
53.     public static string download(string url,string name) throws ioexception{ 
54.         string hash = ""; 
55.         httpgetconnect connect = new httpgetconnect(); 
56.         string content = connect.connect(url, "utf-8"); 
57.         htmlmanage html = new htmlmanage(); 
58.          
59.         string regex = ""hash":"[0-9a-z]+""; 
60.         // 编译正则表达式 
61.         pattern pattern = pattern.compile(regex); 
62.         matcher matcher = pattern.matcher(content); 
63.         if (matcher.find()) { 
64.             hash = matcher.group(); 
65.             hash = hash.replace(""hash":"", ""); 
66.             hash = hash.replace(""", ""); 
67.         } 
68.          
69.         string item = mp3.replace("hash", hash); 
70.         item = item.replace("time", system.currenttimemillis() + ""); 
71.  
72.         system.out.println(item); 
73.         string mp = connect.connect(item, "utf-8"); 
74.          
75.         mp = mp.substring(mp.indexof("(") + 1, mp.length() - 3); 
76.          
77.         jsonobject json = jsonobject.fromobject(mp); 
78.         string playurl = json.getjsonobject("data").getstring("play_url"); 
79.          
80.  
81.         system.out.print(playurl + " == "); 
82.         filedownload down = new filedownload(); 
83.         down.download(playurl, filepath + name + ".mp3"); 
84.          
85.         system.out.println(name + "下载完成"); 
86.         return playurl; 
87.     } 
88.  
89. } 

httpgetconnect.java

 

package com.bing.http;

import java.io.bufferedreader;
import java.io.ioexception;
import java.io.inputstream;
import java.io.inputstreamreader;
import java.security.nosuchalgorithmexception;
import java.security.cert.certificateexception;
import java.security.cert.x509certificate;

import javax.net.ssl.sslcontext;
import javax.net.ssl.trustmanager;
import javax.net.ssl.x509trustmanager;

import org.apache.commons.logging.log;
import org.apache.commons.logging.logfactory;
import org.apache.http.httpentity;
import org.apache.http.client.clientprotocolexception;
import org.apache.http.client.httpclient;
import org.apache.http.client.responsehandler;
import org.apache.http.client.config.requestconfig;
import org.apache.http.client.methods.closeablehttpresponse;
import org.apache.http.client.methods.httpget;
import org.apache.http.conn.clientconnectionmanager;
import org.apache.http.conn.scheme.scheme;
import org.apache.http.conn.scheme.schemeregistry;
import org.apache.http.conn.ssl.sslsocketfactory;
import org.apache.http.impl.client.basicresponsehandler;
import org.apache.http.impl.client.closeablehttpclient;
import org.apache.http.impl.client.defaulthttpclient;
import org.apache.http.impl.client.httpclients;
import org.apache.http.impl.conn.basichttpclientconnectionmanager;
import org.apache.http.params.httpparams;
/**
 * @说明：
 * @author: gaoll
 * @createtime:2014-11-13
 * @modifytime:2014-11-13
 */
public class httpgetconnect {

    /**
     * 获取html内容
     * @param url
     * @param charsetname utf-8、gb2312
     * @return
     * @throws ioexception
     */
    public static string connect(string url,string charsetname) throws ioexception{
        basichttpclientconnectionmanager connmanager = new basichttpclientconnectionmanager();

        closeablehttpclient httpclient = httpclients.custom()
          .setconnectionmanager(connmanager)
          .build();
        string content = "";

        try{
            httpget httpget = new httpget(url);

            requestconfig requestconfig = requestconfig.custom()
            .setsockettimeout(5000)
            .setconnecttimeout(50000)
            .setconnectionrequesttimeout(50000)
            .build();
        httpget.setconfig(requestconfig);
        httpget.setheader("accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");
        httpget.setheader("accept-encoding", "gzip,deflate,sdch");
        httpget.setheader("accept-language", "zh-cn,zh;q=0.8");
        httpget.setheader("connection", "keep-alive");
        httpget.setheader("upgrade-insecure-requests", "1");
        httpget.setheader("user-agent", "mozilla/5.0 (windows nt 6.1; wow64) applewebkit/537.36 (khtml, like gecko) chrome/45.0.2454.101 safari/537.36");
        //httpget.setheader("hosts", "www.oschina.net");
        httpget.setheader("cache-control", "max-age=0");

            closeablehttpresponse response = httpclient.execute(httpget);

            int status = response.getstatusline().getstatuscode();
      if (status >= 200 && status < 300) {

        httpentity entity = response.getentity();
        inputstream instream = entity.getcontent();
        bufferedreader br = new bufferedreader(new inputstreamreader(instream,charsetname));
                stringbuffer sbf = new stringbuffer();
                string line = null;
                while ((line = br.readline()) != null){
                    sbf.append(line + " ");
                }

                br.close();
                content = sbf.tostring();
      } else {
        content = "";
      }

        }catch(exception e){
            e.printstacktrace();
        }finally{
            httpclient.close();
        }
        //log.info("content is " + content);
        return content;
    }
    private static log log = logfactory.getlog(httpgetconnect.class);
}

htmlmanage.java

 

package com.bing.html;

import java.io.ioexception;
import java.util.arraylist;
import java.util.list;

import org.apache.commons.logging.log;
import org.apache.commons.logging.logfactory;
import org.jsoup.jsoup;
import org.jsoup.nodes.document;
import org.jsoup.nodes.element;
import org.jsoup.select.elements;

import com.bing.http.httpgetconnect;

/**
 * @说明：
 * @author: gaoll
 * @createtime:2014-11-13
 * @modifytime:2014-11-13
 */
public class htmlmanage {

    public document manage(string html){
        document doc = jsoup.parse(html);
        return doc;
    }

    public document managedirect(string url) throws ioexception{
        document doc = jsoup.connect( url ).get();
        return doc;
    }

    public list<string> managehtmltag(document doc,string tag ){
        list<string> list = new arraylist<string>();

        elements elements = doc.getelementsbytag(tag);
        for(int i = 0; i < elements.size() ; i++){
            string str = elements.get(i).html();
            list.add(str);
        }
        return list;
    }

    public list<string> managehtmlclass(document doc,string clas ){
        list<string> list = new arraylist<string>();

        elements elements = doc.getelementsbyclass(clas);
        for(int i = 0; i < elements.size() ; i++){
            string str = elements.get(i).html();
            list.add(str);
        }
        return list;
    }

    public list<string> managehtmlkey(document doc,string key,string value ){
        list<string> list = new arraylist<string>();

        elements elements = doc.getelementsbyattributevalue(key, value);
        for(int i = 0; i < elements.size() ; i++){
            string str = elements.get(i).html();
            list.add(str);
        }
        return list;
    }

    private static log log = logfactory.getlog(htmlmanage.class);
}

filedownload.java

 

package com.bing.download;

import java.io.bufferedinputstream;
import java.io.bufferedoutputstream;
import java.io.file;
import java.io.fileoutputstream;

import org.apache.commons.logging.log;
import org.apache.commons.logging.logfactory;
import org.apache.http.client.config.requestconfig;
import org.apache.http.client.methods.closeablehttpresponse;
import org.apache.http.client.methods.httpget;
import org.apache.http.impl.client.closeablehttpclient;
import org.apache.http.impl.client.httpclients;

/**
 * @说明：
 * @author: gaoll
 * @createtime:2014-11-20
 * @modifytime:2014-11-20
 */
public class filedownload {

    /**
     * 文件下载
     * @param url 链接地址
     * @param path 要保存的路径及文件名
     * @return
     */
    public static boolean download(string url,string path){

        boolean flag = false;

        closeablehttpclient httpclient = httpclients.createdefault();
        requestconfig requestconfig = requestconfig.custom().setsockettimeout(2000)
                .setconnecttimeout(2000).build();

        httpget get = new httpget(url);
        get.setconfig(requestconfig);

        bufferedinputstream in = null;
        bufferedoutputstream out = null;
        try{
            for(int i=0;i<3;i++){
                closeablehttpresponse result = httpclient.execute(get);
                system.out.println(result.getstatusline());
                if(result.getstatusline().getstatuscode() == 200){
                    in = new bufferedinputstream(result.getentity().getcontent());
                    file file = new file(path);
                    out = new bufferedoutputstream(new fileoutputstream(file));
                    byte[] buffer = new byte[1024];
                    int len = -1;
                    while((len = in.read(buffer,0,1024)) > -1){
                        out.write(buffer,0,len);
                    }
                    flag = true;
                    break;
                }else if(result.getstatusline().getstatuscode() == 500){
                    continue ;
                }
            }

        }catch(exception e){
            e.printstacktrace();
            flag = false;
        }finally{
            get.releaseconnection();
            try{
                if(in != null){
                    in.close();
                }
                if(out != null){
                    out.close();
                }
            }catch(exception e){
                e.printstacktrace();
                flag = false;
            }
        }
        return flag;
    }

    private static log log = logfactory.getlog(filedownload.class);
}

到这就结束了，有可能有些代码没贴全，主要代码已经差不多，应该可以跑起来，多多指教。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。

原文链接：https://my.oschina.net/gllfeixiang/blog/2995570