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爬取博客园文章

开发技术 开发技术 1周前 (07-31) 15次浏览
目录
  • main文件
  • spider-cnblogs
  • 代码

一直想整个爬虫玩玩,之前用Java试过…的确是术业有专攻啊,Python写起爬虫来更加方便

今天的成果:

main文件

主要的方法都封装在了spider-cnblogs里了,这里主要传递一个url,待会代码贴在后边
爬取博客园文章

spider-cnblogs

大致的思路是这样的,先用requests发送请求,然后使用BeautifulSoup进行html解析,(推荐使用CSS选择器的方式获取想要的内容),解析完成后持久化到数据库,这里使用了阿里云的ECS,里面安装了一个MySQL。

爬取博客园文章

爬取博客园文章

代码

main.py

from black_fish.cnblogs.spider_cnblogs import Cnblogs

if __name__ == '__main__':
    # index,48,候选
    Cnblogs.executeSpider("https://www.cnblogs.com")
    Cnblogs.executeSpider("https://www.cnblogs.com/aggsite/topviews")
    Cnblogs.executeSpider("https://www.cnblogs.com/candidate/")

spider-cnblogs

import requests
from bs4 import BeautifulSoup
import pymysql

class Cnblogs:
    def __init__(self, id, title, href, date, star_num, comment_num, view_num):
        self.id = id
        self.title = title
        self.href = href
        self.date = date
        self.star_num = star_num
        self.view_num = view_num
        self.comment_num = comment_num

    def print(self):
        print(self.id, self.title, self.href, self.date, self.star_num, self.comment_num, self.view_num)

    def executeSpider(cnblogs_url):
        response = requests.get(cnblogs_url);

        bs = BeautifulSoup(response.text);

        # 获取标题&链接
        mainItems = bs.select(".post-item-title");

        # 获取发布日期,点赞数,评论数,浏览量
        timeItems = bs.select(".post-item-foot>.post-meta-item span");

        t_list = []

        for t_index, timeItem in enumerate(timeItems):
            t_list.append(timeItem.string)

        db = pymysql.connect("47.103.6.247", "username", "password", "black_fish_db")

        cursor = db.cursor()

        sql = "insert into cnblogs(title, href, date, star_num, comment_num, view_num) value(%s,%s,%s,%s,%s,%s)"

        for m_index, main_item in enumerate(mainItems):
            cnblog = Cnblogs(0, main_item.string, main_item.attrs['href'],
                             t_list[m_index * 4], int(t_list[m_index * 4 + 1]), int(t_list[m_index * 4 + 2]),
                             int(t_list[m_index * 4 + 3]))
            val = (cnblog.title, cnblog.href, cnblog.date, cnblog.star_num, cnblog.comment_num, cnblog.view_num)
            print(val)
            cursor.execute(sql, val)
        db.commit()

        db.close()



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