python爬取CVPR论文标题、作者、pdf链接并保存到MySQL数据库

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全部源代码：

# -*- coding = utf-8 -*-
# @Time : 2022/5/13 9:33
# @Author :王敬博
# @File : spider.py
# @Software: PyCharm
from bs4 import BeautifulSoup  #网页解析
import re    #正则表表达式文字匹配
import parsel as parsel
import urllib.request,urllib.error  #指定url，获取网页数据
import pymysql.cursors  #连接mysql数据库
num = 1;
def main():
    baseurl = "https://openaccess.thecvf.com/CVPR2019?day=2019-06-18"
    (datalist,num) = getData(baseurl)
    print("爬取完毕！")
    #调研分析数据函数
    conn(datalist,num)          #调用保存函数
    print("保存到数据库！")
def askURL(url):
    head = {   #伪装请求头，模拟浏览器访问
       "User-Agent":" Mozilla / 5.0(Linux;Android6.0;Nexus5 Build / MRA58N) AppleWebKit / 537.36(KHTML, likeGecko) Chrome / 99.0.4844.51Mobile Safari / 537.36"
    }
    request = urllib.request.Request(url,headers=head)
    html = ""
    try:
        response = urllib.request.urlopen(request)
        html = response.read().decode('utf-8')
        #print(html)
    except urllib.error.URLError as e:
        if hasattr(e,"code"):
            print(e.code)
        if hasattr(e,"reason"):
            print(e.reason)
    return html  #返回爬到所有的html数据




def getData(baseurl):
    html = askURL(baseurl)
    selector = parsel.Selector(html)
    datalist = []
    titlelist = []
    authorlist = []
    abstractlist = []  #摘要列表
    datelist = []      #时间列表
    pdflist = []       #pdf链接列表
    href_list = selector.xpath('//dl/dt/a/@href').getall()
    href_list1 = []
    for href in href_list:
        href1 = 'https://openaccess.thecvf.com/'+href
        href_list1.append(href1)
    num = len(href_list1)
    for href in href_list1:
        href_data = askURL(href)
        selector_02 = parsel.Selector(href_data)
        paper_title =selector_02.xpath('// *[ @ id = "papertitle"]/text()').get()
        title = paper_title.strip()
        titlelist.append(title)
        paper_author = selector_02.xpath('//*[@id="authors"]/b/i/text()').get()
        authorlist.append(paper_author)
        papaer_abstract = selector_02.xpath('//*[@id="abstract"]/text()').get()
        abstract = papaer_abstract.strip()
        abstractlist.append(abstract)

        paper_date = selector_02.xpath('//*[@id="authors"]').get()
        finddata = re.compile(r'(CVPR)(.*),')
        paper_date = str(re.findall(finddata,paper_date))
        date = paper_date.replace("[('CVPR', '),"," ")
        date = date.replace("')]","")
        date = date.strip()
        datelist.append(date)

        pdflink = selector_02.xpath('//*[@id="content"]/dl/dd/a[1]').get()
        findpdflink = re.compile(r'<a href="../../(.*?)">pdf</a>')
        pdflink = str(re.findall(findpdflink, pdflink))
        pdflink = pdflink.replace("['", "")
        pdflink = pdflink.replace("']", "")
        pdflink = "https://openaccess.thecvf.com/" + pdflink
        pdflist.append(pdflink)

    for i in range(0,len(href_list1)):
        print(f"--------------正在爬取第{i}条--------------")
        data = []
        data.append(titlelist[i])
        data.append(authorlist[i])
        data.append(abstractlist[i])
        data.append(pdflist[i])
        data.append(datelist[i])
        datalist.append(data)

    return datalist,num


def conn(datalist,num):           #改成自己的数据库信息即可
    conn = pymysql.connect(host='localhost',user='root',password='1767737316.',database='paperdata',cursorclass=pymysql.cursors.DictCursor)
    cursor = conn.cursor()

    for i in range(0,num):
        print(f"--------------正在保存第{i+1}条--------------")
        list = datalist[i]
        data1 = tuple(list)
        #print(data1)
        sql = 'insert into paper(title,author,abstract,pdflink,date1) values(%s,%s,%s,%s,%s)' #五个字符串对应MySQL的列名
        # (2)准备数据  ，此外设置的字符长度一定要大一点。
        # (3)操作
        try:
            cursor.execute(sql, data1)
            conn.commit()
        except Exception as e:
            print('插入数据失败', e)
            conn.rollback()  # 回滚
        # 关闭游标
        # cursor.close()
        # 关闭连接
        # conn.close()

if __name__ == "__main__":
    main()

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