Java爬取并下载酷狗音乐
作者：互联网
本文方法及代码仅供学习，仅供学习。
案例：
下载酷狗TOP500歌曲，代码用到的代码库包含：Jsoup、HttpClient、fastJson等。
正文：
1、分析是否可以获取到TOP500歌单
打开酷狗首页，查看TOP500，发现存在分页，每页显示22条歌曲，
发现酷狗的链接如下：
https://www.kugou.com/yy/rank/home/1-8888.html?from=homepage
通过更改链接中的1可以进行分页，所以我们可以通过更改链接地址获取其余的歌曲。
2、分析找到正真的mp3下载地址
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。
最终在列表中找到：
https://wwwapi.kugou.com/yy/index.php?r=play/getdata&callback=jQuery191044492686523157987_1559446927765&hash=458E9B9F362277AC37E9EEF1CB80B535&album_id=18712576&dfid=1ZxQbe0MiP8J09j5tR0Np9IA&mid=9393340fecff864a4d6c4e95099b2be1&platid=4&_=1559446927766
这个请求结果中发现了mp3的完整地址：
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、代码实现
SpiderKugou.java
package com.billy.test;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* 爬取并下载酷狗的歌曲
*/
public class SpiderKugou {
private static String filePath;
//酷狗地址
private static String LINK;
//mp3地址
private static String mp3;
static {
filePath = "F:/music/";
LINK = "https://www.kugou.com/yy/rank/home/PAGE-8888.html?from=rank";
mp3 = "https://wwwapi.kugou.com/yy/index.php?r=play/getdata&callback=jQuery19103632090130122796_1558800325111&"
+ "hash=HASH&_=TIME";
}
public static void main(String[] args) throws Exception {
for(int i = 5 ; i < 23 ; i++){
String url = LINK.replace("PAGE", i + "");
downSong(url);
}
}
/**
* 下载歌曲
* @param url
* @throws Exception
*/
private static void downSong(String url) throws Exception{
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 elements = ele.getElementsByTag("li");
for(int i = 0 ; i < elements.size() ; i++){
Element item = elements.get(i);
String title = item.attr("title").trim();
String link = item.getElementsByTag("a").first().attr("href");
downLoad(link,title);
Thread.sleep(1000);
}
}
/**
* 下载
* @param url
* @param name
* @throws IOException
*/
private static void downLoad(String url,String name) throws IOException{
String hash = "";
HttpGetConnect connect = new HttpGetConnect();
String content = connect.connect(url, "utf-8");
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:" + item);
String mp = connect.connect(item, "utf-8");
mp = mp.substring(mp.indexOf("(") + 1, mp.length() - 3);
JSONObject json = JSON.parseObject(mp);
if(Integer.parseInt(json.get("status") + "") != 0){
String playUrl = json.getJSONObject("data").getString("play_url");
FileDownload down = new FileDownload();
down.download(playUrl, filePath + name + ".mp3");
}
}
}
View Code
HttpGetConnect.java
package com.billy.test;
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 java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
/**
* httpclient 工具类
*/
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("cache-control", "max-age=0");
httpget.setHeader("Referer","https://www.kugou.com/song/");
//设置cookie
httpget.setHeader("Cookie", "kg_mid=9393340fecff864a4d6c4e95099b2be1;");
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);
}
View Code
HtmlManage.java
package com.billy.test;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* html manage 工具类
*/
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);
}
View Code
FileDownload.java
package com.billy.test;
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;
/**
* 文件下载工具类
*/
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);
}
View Code
标签：酷狗,Java,String,java,new,爬取,import,apache,org 来源： https://www.cnblogs.com/BillyYoung/p/10962441.html