4步实现Java爬取酷狗音乐，so easy。

jar包：包括：jsoup、HttpClient、net.sf.json大家可以自行去下载

1、分析是否能获得TOP500歌单

首先，打开酷狗首页查看酷狗TOP500，

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/1-6666.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，然后就出来了。

代码阶段：

介绍：

SpiderKugou.java #主程序启动类

HttpGetConnect.java #httpclient接口工具类

HtmlManage.java #jsonp解析标签扩展类

FileDownload.java #文件下载

1.主程序启动类

package com.wurao;import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;import net.sf.json.JSONObject;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;/*** @说明：主启动类* @author: 勿扰* @CreateTime:2019年1月10日* @ModifyTime:2019年1月10日*/
public class SpiderKugou {public static String filePath = "D:/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;}}

2.httpclient接口工具类

package com.wurao;import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpEntity;
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;
import org.apache.http.impl.conn.BasicHttpClientConnectionManager;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.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.HttpParams;
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;/*** @说明：httpclent接口* @author: 勿扰* @CreateTime:2019年1月10日* @ModifyTime:2019年1月10日*/
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);
}

3.jsonp解析标签扩展类

package com.wurao;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;/*** @说明：jsonp解析标签扩展类* @author: 勿扰* @CreateTime:2019年1月10日* @ModifyTime:2019年1月10日*/
public class HtmlManage {public Document manage(String html){Document doc = Jsoup.parse(html);return doc;}/*** 管理链接* @param url* @return* @throws IOException*/public Document manageDirect(String url) throws IOException{Document doc = Jsoup.connect( url ).get();return doc;}/*** 管理查找当前元素的标签* @param doc* @param tag* @return*/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;}/*** 管理元素节点，或节点下面是否有class* @param doc* @param clas* @return*/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;}/*** 管理属性和属性值, 获取所有元素* @param doc* @param key* @param value* @return*/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);
}

4.文件下载

package com.wurao;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：文件下载* @author: 勿扰* @CreateTime:2019年1月10日* @ModifyTime:2019年1月10日*/
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);
}

5.pom的jar包

<dependencies><!-- commons 包--><dependency><groupId>commons-lang</groupId><artifactId>commons-lang</artifactId><version>2.6</version></dependency><dependency><groupId>commons-collections</groupId><artifactId>commons-collections</artifactId><version>3.2.1</version></dependency><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>2.4</version></dependency><dependency><groupId>commons-net</groupId><artifactId>commons-net</artifactId><version>3.3</version></dependency><dependency><groupId>commons-beanutils</groupId><artifactId>commons-beanutils</artifactId><version>1.8.3</version></dependency><!-- json 处理 --><dependency><groupId>net.sf.json-lib</groupId><artifactId>json-lib</artifactId><version>2.4</version><classifier>jdk15</classifier></dependency><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>2.6</version></dependency><!--httpclient --><dependency><groupId>org.apache.httpcomponents</groupId><artifactId>httpclient</artifactId><version>4.5.3</version></dependency><!--jsoup  --><dependency><groupId>org.jsoup</groupId><artifactId>jsoup</artifactId><version>1.8.3</version></dependency></dependencies><build><plugins><!-- 资源文件拷贝插件 --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-resources-plugin</artifactId><version>2.7</version><configuration><encoding>UTF-8</encoding></configuration></plugin><!-- java编译插件 --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.2</version><configuration><source>1.8</source><target>1.8    </target><encoding>UTF-8</encoding></configuration></plugin></plugins>
</build>

主要代码基本成功，已经能运行并下载歌曲了。