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":"/u767d/u5c0f/u767d - /u6700/u7f8e/u5a5a/u793c","author_name":"/u767d/u5c0f/u767d","song_name":"/u6700/u7f8e/u5a5a/u793c","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
package com.bing.spider;import java.io.IOException;import java.util.regex.Matcher;import java.util.regex.Pattern;import org.jsoup.nodes.Document;import org.jsoup.nodes.Element;import org.jsoup.select.Elements;import com.bing.download.FileDownload;import com.bing.html.HtmlManage;import com.bing.http.HttpGetConnect;import net.sf.json.JSONObject;public class SpiderKugou { public static String filePath = "F:/music/"; public static String mp3 = "https://wwwapi.kugou.com/yy/index.php?r=play/getdata&callback=jQuery191027067069941080546_1546235744250&" + "hash=HASH&album_id=0&_=TIME"; public static String LINK = "https://www.kugou.com/yy/rank/home/PAGE-8888.html?from=rank"; //"https://www.kugou.com/yy/rank/home/PAGE-23784.html?from=rank"; public static void main(String[] args) throws IOException { for(int i = 1 ; i < 23 ; i++){ String url = LINK.replace("PAGE", i + ""); getTitle(url); //download("https://www.kugou.com/song/mfy6je5.html"); } } public static String getTitle(String url) throws IOException{ HttpGetConnect connect = new HttpGetConnect(); String content = connect.connect(url, "utf-8"); HtmlManage html = new HtmlManage(); Document doc = html.manage(content); Element ele = doc.getElementsByClass("pc_temp_songlist").get(0); Elements eles = ele.getElementsByTag("li"); for(int i = 0 ; i < eles.size() ; i++){ Element item = eles.get(i); String title = item.attr("title").trim(); String link = item.getElementsByTag("a").first().attr("href"); download(link,title); } return null; } public static String download(String url,String name) throws IOException{ String hash = ""; HttpGetConnect connect = new HttpGetConnect(); String content = connect.connect(url, "utf-8"); HtmlManage html = new HtmlManage(); String regEx = "/"hash/":/"[0-9A-Z]+/""; // 编译正则表达式 Pattern pattern = Pattern.compile(regEx); Matcher matcher = pattern.matcher(content); if (matcher.find()) { hash = matcher.group(); hash = hash.replace("/"hash/":/"", ""); hash = hash.replace("/"", ""); } String item = mp3.replace("HASH", hash); item = item.replace("TIME", System.currentTimeMillis() + ""); System.out.println(item); String mp = connect.connect(item, "utf-8"); mp = mp.substring(mp.indexOf("(") + 1, mp.length() - 3); JSONObject json = JSONObject.fromObject(mp); String playUrl = json.getJSONObject("data").getString("play_url"); System.out.print(playUrl + " == "); FileDownload down = new FileDownload(); down.download(playUrl, filePath + name + ".mp3"); System.out.println(name + "下载完成"); return playUrl; }}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 + "/n"); } 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武林网。
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