Jsoup解析获取品花社图片

emmmm，闲着没事，想起了之前一个学长做的品花社的APP，刚好之前有了解Jsoup这个Java解析HTML的库，便花了三四个小时写了这个东西，把网站上大大小小的MM的图片都一股脑的爬到本地并做了简单的分装。

项目只是学习一下Jsoup的使用和网页解析相关知识，没其他意思。

全部的图片体积大概会是4个多G，修改代码里的MAX_PAGES_NUM变量值即可。

项目地址：https://github.com/Ganart/SpiderMM36D

关于品花社是什么，自己点进去看吧：http://www.mm36d.com/

结果看图吧：

代码在这儿：

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

public class SpiderMM36D {

    static class SmallImg {
        String id;
        String url;
    }
    //截止到2018年6月21，这个值最大为102，
    static int MAX_APGES_NUM = 1;
    static String url = "http://www.mm36d.com/home/0/";
    //eg：http://www.mm36d.com/belle/0/0/id/2
    static String detailUrl = "http://www.mm36d.com/belle/0/0/";
    static List<String> oneMMDetailUrls = new ArrayList<>();
    static List<SmallImg> allImgObjects = new ArrayList<>();

    public static void main(String[] args) throws IOException {

        for (int i =1; i<=MAX_APGES_NUM;i++){
            gainOnePageElement(i);
        }
        System.out.println("完成图片链接解析，开始下载图片");
        for (int i=0;i<allImgObjects.size();i++){
            downloadSmallImg(allImgObjects.get(i));
            System.out.println("任务进度:"+((float)(i+1)/allImgObjects.size()));
        }

    }

    //获取小图
    public static void gainOnePageElement(int index){
        Document document = null;
        Elements elements = null;
        try {
            document = Jsoup.connect(url+index).get();
            if (document != null) {
                elements = document.getElementsByClass("re-size1-img");
                for (Element element:elements){
                    allImgObjects.add
                            (subMMImgUrl(element.getElementsByTag("img").toString()));
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            document = null;
            elements = null;
        }
    }

    //剪辑出图片的URL和id
    public static SmallImg subMMImgUrl(String tag){
        String head = "<img class=\"lazy\" data-original=\"";
        String withoutHead = tag.substring(head.length());
        String cleanUrl = withoutHead.substring(0,withoutHead.indexOf("\""));
        SmallImg smallImg = new SmallImg();
        smallImg.url = cleanUrl;
        String id = tag.substring(tag.indexOf("(")+1,tag.indexOf(")"));
        smallImg.id = id;
        return smallImg;
    }

    //剪辑出图片的url
    public static String subDetailImgUlr(String tag){
        String head = "<img class=\"lazy\" data-original=\"";
        String withoutHead = tag.substring(head.length());
        String cleanUrl = withoutHead.substring(0,withoutHead.indexOf("\""));
        return cleanUrl;
    }

    //下载小图
    public static void downloadSmallImg(SmallImg smallImg){
        if (smallImg.url.equals("")){
            return;
        }
        try {
            URL imgUrl = new URL(smallImg.url);
            String url = smallImg.url;
            BufferedInputStream bis = new BufferedInputStream
                    (imgUrl.openConnection().getInputStream());
            byte[] imgArray = new byte[2048*2048];
            int len = 0;
            File file = new File("E:\\SpiderMM36D\\mmImgs\\"+smallImg.id);
            file.mkdir();
            BufferedOutputStream bos =
                    new BufferedOutputStream
                            (new FileOutputStream(file.getAbsolutePath()+"\\"
                                    +smallImg.id+url.substring(url.lastIndexOf("."))));
            while ((len=bis.read(imgArray))!=-1){
                bos.write(imgArray,0,len);
            }
            bos.flush();
            bos.close();
            bis.close();
            gainDetailPageElement(smallImg.id);
            oneMMDetailUrls.clear();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    //下载大图
    public static void downloadBigImg(String id,String picUrl,int i){
        if (picUrl.equals("")){
            return;
        }
        try {
            URL imgUrl = new URL(picUrl);
            BufferedInputStream bis = new BufferedInputStream
                    (imgUrl.openConnection().getInputStream());
            byte[] imgArray = new byte[4096*4096];
            int len = 0;
            File file = new File("E:\\SpiderMM36D\\mmImgs\\"+id);
            file.mkdir();
            BufferedOutputStream bos =
                    new BufferedOutputStream
                            (new FileOutputStream
                                    (file.getAbsolutePath()+"\\"+id+"_"+i+
                                            picUrl.substring(picUrl.lastIndexOf("."))));
            while ((len=bis.read(imgArray))!=-1){
                bos.write(imgArray,0,len);
            }
            bos.flush();
            bos.close();
            bis.close();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    //每个MM对应的详情页
    public static void gainDetailPageElement(String id){
        Document document = null;
        Elements elements = null;
        try {
            document = Jsoup.connect(detailUrl+id+"/2").get();
            if (document != null) {
                elements = document.getElementsByClass("re-sizemm");
                for (Element element:elements){
                    oneMMDetailUrls.add
                            (subDetailImgUlr
                                    (element.getElementsByTag
                                            ("img").toString()));
                }
                for (int j = 0;j<oneMMDetailUrls.size();j++){
                    downloadBigImg(id,oneMMDetailUrls.get(j),j);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            document = null;
            elements = null;
        }
    }

}