java爬取并下载酷狗TOP500歌曲的方法
这篇文章主要介绍了java爬取并下载酷狗TOP500歌曲的方法，非常具有实用价值，需要的朋友可以参考下是这样的，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
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":"+"";
// 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 + " ");
}
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;
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CodeAE代码之家。
原文链接：https://my.oschina.net/gllfeixiang/blog/2995570
http://www.zzvips.com/article/174033.html
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