爬虫Spider

该爬虫分为两部分，分别为Spider.py和model.py

Spider.py

该文件主要业务逻辑是调用Selenium来通过自动化测试的方法实现模拟人的行为来对网页进行请求，并将请求到的HTML提取为文本，为后续的数据抽取做铺地。需要的第三方工具包Selenium，scrapy，time

spider.py具体实现

from selenium import webdriver  # 使用chromedriver必需
from scrapy import Selector  # 使用Selector
import time  # TimeSleep休眠
from Interests.models import *      #表示models文件处于Interests文件夹下
from selenium.common.exceptions import *
​
domin = "https://detail.zol.com.cn/motherboard"
broswer = webdriver.Chrome(executable_path="C:\MyApplications\chromedriver.exe")
​
url_list = []  # 设置列表用于存放product_url
​
def Get_Url():
    broswer.get(domin)
    sel = Selector(text=broswer.page_source)
    info = sel.xpath("//ul[@class='clearfix']/li/a/@href").extract()
    for i in info:
        product_url = 'https://detail.zol.com.cn' + i
        print(product_url)
        url_list.append(product_url)
​
def Get_Info():
    for a in url_list:
        broswer.get(a)
        detail = Selector(text=broswer.page_source)  # 获取到单个商品的详情页面
        name = detail.xpath("//h1/text()").extract()[0]
        core = detail.xpath("//ul/li[1]/p[1]/text()").extract()[0]
        radio_core = detail.xpath("//ul/li[1]/p[2]/text()").extract()[0]
        ram_type = detail.xpath("//ul/li[2]/p[1]/text()").extract()[0]
        max_ram = detail.xpath("//ul/li[2]/p[2]/text()").extract()[0]
        appear_size = detail.xpath("//ul/li[3]/p[1]/text()").extract()[0]
        broad_type = detail.xpath("//ul/li[3]/p[2]/text()").extract()[0]
        energy_socket = detail.xpath("//ul/li[4]/p[1]/text()").extract()[0]
        charge_mode = detail.xpath("//ul/li[4]/p[2]/text()").extract()[0]
​
        info = Info()
        info.name = name
        info.core = core
        info.radio_core = radio_core
        info.ram_type = ram_type
        info.max_ram = max_ram
        info.appear_size = appear_size
        info.broad_type = broad_type
        info.energy_socket = energy_socket
        info.charge_mode = charge_mode
​
        info.save(force_insert=True)
​
if __name__ == "__main__":
    t1 = Get_Url()
    t2 = Get_Info()
​
    time.sleep(3)
    t1.start()
    t2.start()

​

models.py

models.py的主要功能是链接数据库，但是数据库中的表格不必是提前建立好的。通过peewee第三方工具包创建一个指定数据库的基础模型类。其指定数据库中数据类型可以为CharField，TextField，DateField等。

models具体代码实现

from peewee import *
​
db = MySQLDatabase("demo", host="127.0.0.1", port=3306, user="root", password="123456")
​
# 创建一个指定数据库的基础模型类。
# 定义一个建立数据库连接的基础模型类，这样就不必为后续模型指定数据库
class BaseModel(Model):
    class Meta:
        database = db
​
class Info(BaseModel):
    name =  CharField()
    core = CharField()
    radio_core = TextField()
    ram_type = TextField()
    max_ram = CharField()
    appear_size = TextField()
    broad_type = TextField()
    energy_socket = TextField()
    charge_mode = TextField()
​
if __name__ == "__main__":
    db.create_tables([Info])

​