webmagic

webmagic学习笔记

官网地址： http://webmagic.io/

核心思路：

1. 自定义BookPageProcess类，实现 PageProcessor接口，并重写process() 。方法内主要解析html页面标签，获取需要的数据，将数据存入Pipeline
2. 自定义BookPageContentPipeline类，实现Pipeline接口，并重写process()。方法内主要是进行数据持久化，本文使用mybatis进行持久化入库。
3. 通过定时任务，定时拉取数据

    us.codecraft
    webmagic-core
    0.7.3


    us.codecraft
    webmagic-extension
    0.7.3

DROP TABLE IF EXISTS `bookdata`;
CREATE TABLE `bookdata` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `picUrl` varchar(128) DEFAULT NULL,
  `name` varchar(64) DEFAULT NULL,
  `author` varchar(64) DEFAULT NULL,
  `readPeopleNum` varchar(24) DEFAULT NULL,
  `chapter` varchar(24) DEFAULT NULL,
  `wordNum` varchar(24) DEFAULT NULL,
  `status` varchar(24) DEFAULT NULL,
  `lastUpdateTime` datetime DEFAULT NULL,
  `downloadUrl` varchar(128) DEFAULT NULL,
  `note` varchar(255) DEFAULT NULL,
  `likeBook` text,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=401 DEFAULT CHARSET=utf8;

spring:
  datasource:
    type: org.apache.commons.dbcp.BasicDataSource
    url: jdbc:mysql://localhost:3306/pachong?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=true&serverTimezone=GMT%2B8
    username: root
    password: 123456
    driverClassName: com.mysql.jdbc.Driver

BookVo类

package com.easyexcel.demo.vo;

import lombok.Data;

import java.util.Date;

@Data
public class BookVo {
    private Integer id;
    private String picUrl;
    private String name;
    private String author;
    private String readPeopleNum;
    private String chapter;
    private String wordNum;
    private String status;
    private Date lastUpdateTime;
    private String downloadUrl;
    private String note;
    private String likeBook;
}

BookDataMapper类

package com.easyexcel.demo.mapper;

import com.easyexcel.demo.vo.BookVo;
import org.springframework.stereotype.Component;

@Component
public interface BookDataMapper {

    public int insertBookVo(BookVo bookVo);
}

BookDataMapper.xml

    
        
        
        
        
        
        
        
        
        
        
        
        
        
    
    
        
            SELECT LAST_INSERT_ID()
        
        insert into bookdata
        
            
                picUrl,
            
            
                name,
            
            
                author,
            
            
                readPeopleNum,
            
            
                chapter,
            
            
                wordNum,
            
            
                status,
            
            
                lastUpdateTime,
            
            
                downloadUrl,
            
            
                note,
            
            
                likeBook
            
        
        
            
                #{picUrl},
            
            
                #{name},
            
            
                #{author},
            
            
                #{readPeopleNum},
            
            
                #{chapter},
            
            
                #{wordNum},
            
            
                #{ status},
            
            
                #{lastUpdateTime},
            
            
                #{ downloadUrl},
            
            
                #{ note},
            
            
                #{ likeBook}
            
        
    

BookDataService类

package com.easyexcel.demo.Service;

import com.easyexcel.demo.mapper.BookDataMapper;
import com.easyexcel.demo.vo.BookVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class BookDataService {

    @Autowired
    private BookDataMapper bookDataMapper;

    public int insertBookVo(BookVo bookVo) {
        return bookDataMapper.insertBookVo(bookVo);
    }
}

BookPageProcess类

package com.easyexcel.demo.pageprocessor;

import com.alibaba.fastjson.JSONObject;
import com.easyexcel.demo.vo.BookVo;
import org.jsoup.Jsoup;
import org.jsoup.select.Elements;
import us.codecraft.webmagic.Page;
import us.codecraft.webmagic.Site;
import us.codecraft.webmagic.processor.PageProcessor;
import us.codecraft.webmagic.selector.Selectable;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.List;

public class BookPageProcess implements PageProcessor {

    public static final String DOMAIN = "https://www.iqisuu.com";
    private Site site = Site.me().setRetryTimes(3)
            .setTimeOut(10 * 1000)
            .setRetryTimes(3)
            .setRetrySleepTime(3000);

    @Override
    public void process(Page page) {
        List nodes = page.getHtml().css("div.l ul ").nodes();
        if (nodes != null && nodes.size() > 0) {

            List detailUrls = page.getHtml().css("div#newscontent div.l ul li span.s2 a", "href").all();
            detailUrls.forEach(page::addTargetRequest);
            List pageUrls = page.getHtml().css("div.pages div#pagelink a", "href").all();
            String nextString = pageUrls.get(pageUrls.size() - 2).substring(0, pageUrls.get(pageUrls.size() - 2).length() - 1);

            page.addTargetRequest(DOMAIN + nextString);
        } else {
            this.saveData(page);
        }
    }

    private void saveData(Page page) {

        BookVo bookVo = new BookVo();
        bookVo.setPicUrl(page.getHtml().css("div#sidebar div#fmimg img", "data-original").toString());
        bookVo.setName(page.getHtml().css("div#info h1", "text").toString());
        bookVo.setAuthor(page.getHtml().css("div#info a", "text").all().get(0));

        String text = page.getHtml().css("div#info p.hidden-xs", "text").all().get(0);
        String replace = text.replace(" ", "");
        String[] split = replace.split("\|");
        bookVo.setReadPeopleNum(split[0]);
        bookVo.setChapter(split[1]);
        bookVo.setWordNum(split[2]);
        bookVo.setStatus(split[3]);
        String timeString = page.getHtml().css("div#info p.hidden-xs", "text").all().get(2);
        String substring = timeString.substring(timeString.indexOf("：") + 1, timeString.length());
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            Date parse = simpleDateFormat.parse(substring);
            bookVo.setLastUpdateTime(parse);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        //  格式: /down/70888/
        String downHtml = page.getHtml().css("div#maininfo div.readbtn a.addbookcase", "href").toString();
        String bookId = downHtml.substring(6, downHtml.length() - 1);
        // 下载地址格式 ： https://www.iqisuu.com/api/txt_down.php?articleid=53694&articlename=古老之风云再起
        bookVo.setDownloadUrl(DOMAIN + "/api/txt_down.php?articleid=" + bookId + "&articlename=" + bookVo.getName());
        bookVo.setNote(Jsoup.parse(page.getHtml().css("div#intro").toString()).text());
        HashMap map = new HashMap<>();
        List likeBookHtmlList = page.getHtml().css("div.hidden-xs p a").all();
        likeBookHtmlList.forEach(entry -> {
            Elements a = Jsoup.parse(entry).select("a");
            String href = DOMAIN + a.attr("href");
            String text1 = a.text();
            map.put(text1, href);
        });
        String jsonString = JSONObject.toJSONString(map);
        bookVo.setLikeBook(jsonString);
        page.putField("bookVo", bookVo);
    }

    @Override
    public Site getSite() {
        return site;
    }
}

BookPageContentPipeline类

package com.easyexcel.demo.listerner;

import com.easyexcel.demo.Service.BookDataService;
import com.easyexcel.demo.vo.BookVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import us.codecraft.webmagic.ResultItems;
import us.codecraft.webmagic.Task;
import us.codecraft.webmagic.pipeline.Pipeline;

@Component
public class BookPageContentPipeline implements Pipeline {
    @Autowired
    private BookDataService bookDataService;

    @Override
    public void process(ResultItems resultItems, Task task) {
        BookVo bookVo = (BookVo) resultItems.get("bookVo");
        if (bookVo != null) {
            bookDataService.insertBookVo(bookVo);
        }
    }
}

BookTask类

package com.easyexcel.demo.task;

import com.easyexcel.demo.listerner.BookPageContentPipeline;
import com.easyexcel.demo.pageprocessor.BookPageProcess;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import us.codecraft.webmagic.Spider;

@Component
@EnableScheduling
public class BookTask {

    private static final String URL= "https://www.iqisuu.com/fenlei/xuanhuan/1/";

    @Autowired
    BookPageContentPipeline bookPageContentPipeline;

    @Scheduled(cron = "* * * * * *")
    public void simpleRead() {
        Spider.create(new BookPageProcess()).addUrl(URL).addPipeline(bookPageContentPipeline).thread(4)
                .run();

    }
}

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