主要是对京东页面的商品检索接口的抓取，进行返回数据

主要利用：
python的request库以及xpath

网页分析

进入首页面，打开f12，network进行网络抓包
输入商品名称：小米手机
分析抓包：通过response 进行查看

url

在地址：https://search.jd.com/Search?keyword=%E5%B0%8F%E7%B1%B3%E6%89%8B%E6%9C%BA&enc=utf-8&suggest=1.his.0.0&wq=&pvid=922913c28d854d979bb187fa68bfef4e
链接分析：https://search.jd.com/Search?keyword=%E5%B0%8F%E7%B1%B3%E6%89%8B%E6%9C%BA&enc=utf-8&是有效部分
分析参数：keyword是我们进行搜多的内容

京东

爬虫编写

import requests 
from lxml import etree
import chardet
import pymysql

# 链接数据库
conn = pymysql.connect(
            host = 'localhost',
            user = 'root',
            password = '123456',
            database = 'shopping',
            charset = 'utf8'
        )
cur = conn.cursor()
# 初始地址
url = 'https://search.jd.com/Search?keyword={}&enc=utf-8&'.format(n)
# 请求头
headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3724.8 Safari/537.36'
    }

try:
    # 开始请求
    res = requests.get(url, headers=headers)
    html = res.content
    #进行解码
    encoding = chardet.detect(html).get('encoding')
    html = html.decode(encoding, 'ignore')

    # print(html)
    #创建节点对象，使用xpath进行清洗
    docs = etree.HTML(html)
    good_list = docs.xpath('//li[@class="gl-item"]/div')  # 取出所有商品的列表
    # print(good_list)
    print(len(good_list))
     #循环列表，从每个数据中清洗更干净的数据
    for good in good_list:
        # print(good.xpath('.//text()'))
        title = (good.xpath('./div/a/em//text()'))[:3] #标题
        price = good.xpath('.//div/strong/i/text()')    # 价格
        cover = good.xpath('./div[@class="p-img"]/a/img/@source-data-lazy-img')  # 图片
        intro = good.xpath('./div[@class="p-img"]/a/@title')  #介绍
        # 转化为字符串
        title = ''.join(title)
        price = ''.join(price)
        cover = "https:" + ''.join(cover)
        intro = ''.join(intro)
         
        # 图片保存到本地
        pic = requests.get(url=cover, headers=headers)
        dir = "E:\\biyesheji\\mall1\\mall1\\static\\images\\goods\\{}".format(i) + '.jpg'
        with open(dir,'wb') as f:
            f.write(pic.content)
            
        if price == '':
            continue
        price = float(price)
        print(title)
        print(price)
        cover = 'static/images/goods/{}'.format(i) + '.jpg'
        print(cover)
        print(intro)
        print("#"*100)
        sql1 = "insert into goods_goods(id,name,price,stock, count, intro, goodstype_id, stores_id, creatTime) values(%s, %s, %s, %s, %s,%s, %s,%s,%s)"
            cur.execute(sql1, (i, title, price, 10, 0, intro, m, 1, '2019-03-24 01:45:32.227014'))
            
            sql2 = 'insert into goods_goodsimage(id, path, status, intro, goods_id)values(%s, %s, %s, %s, %s)'
            cur.execute(sql2, (i, cover, 0, intro, i))
            conn.commit()
    except:
        continue

只是对京东的界面进行简单分析

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