python爬虫爬取个人博客导入sqlite数据库

素颜马尾好姑娘i 2023-01-06 13:57 87阅读 0赞

## python爬虫爬取个人博客导入sqlite数据库 ##

**【代码示例】**

import re
 from bs4 import BeautifulSoup
 import urllib.request,urllib.error
 import sqlite3
 
 
 def main():
 #声明要爬取的博客网址
 baseurl = "https://blog.csdn.net/gets_s/article/list/"
 #获取数据
 datalist = getData(baseurl)
 #保存数据
 dbpath = "blogs.db"
 #print(datalist)
 saveData(dbpath,datalist)
 
 #正则表达式
 findtitle = re.compile(r'<a .*>.*(.*?)</a>',re.S)
 findlink = re.compile(r'<a.*href="(.*?)"')
 findtime = re.compile(r'(.*?)')
 findnum = re.compile(r'<img alt="" src="https://csdnimg.cn/release/blogv2/dist/pc/img/readCountBlack.png"/>(.*?)')
 def getData(baseurl):
 datalist = []
 for i in range(1,3):
 url = baseurl + str(i)
 html = askURL(url)
 
 #对获取的网页代码进行解析
 soup = BeautifulSoup(html,"html.parser")
 for item in soup.find_all('div',class_="article-item-box csdn-tracking-statistics"):
 item = str(item)
 #print(item)
 data = []
 
 title = re.findall(findtitle,item)
 title = title[0].replace("\n","")
 #print(title)
 data.append(title)
 
 link = re.findall(findlink,item)[0]
 #print(link)
 data.append(link)
 
 time = re.findall(findtime,item)[0]
 #print(time)
 data.append(time)
 
 num = re.findall(findnum,item)[0]
 #print(num)
 data.append(num)
 
 datalist.append(data)
 
 return datalist
 def askURL(url):
 head = {
 
 "User-Agent": "Mozilla / 5.0(Windows NT 10.0;Win64;x64) AppleWebKit / 537.36(KHTML, likeGecko) Chrome / 80.0.3987.163Safari / 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
 
 
 def saveData(dbpath,datalist):
 init_db(dbpath)
 conn = sqlite3.connect(dbpath)
 cur = conn.cursor()
 
 for data in datalist:
 for index in range(len(data)):
 sql = '''
 insert into blogs(
 title, blog_link, sigup_time, num)
 values('%s','%s','%s','%s') '''%(data[0],data[1],data[2],data[3])
 print(sql)
 cur.execute(sql)
 conn.commit()
 cur.close()
 conn.close()
 def init_db(dbpath):
 sql = '''
 create table blogs
 (
 id integer primary key autoincrement,
 title text,
 blog_link text,
 sigup_time numeric,
 num numeric
 )
 '''
 conn = sqlite3.connect(dbpath)
 cursor = conn.cursor()
 cursor.execute(sql)
 conn.commit()
 conn.close()
 if __name__ == "__main__":
 main()

**【运行结果】**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dldHNfcw_size_16_color_FFFFFF_t_70]

**【思路总结】**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dldHNfcw_size_16_color_FFFFFF_t_70 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dldHNfcw_size_16_color_FFFFFF_t_70]: /images/20221119/bc94f1183a3b4447a4cef6f05159dbb8.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2dldHNfcw_size_16_color_FFFFFF_t_70 1]: /images/20221119/bc642624cac34fd5bdc3bdc0bec9ff38.png