J'ai rencontré les problèmes suivants lors de l'exploration de toutes les informations sur les téléphones mobiles sur JD.com :
1 Trop de valeurs de retour, comme le montre l'image suivante :

2. Le code de l'araignée est le suivant :

-- codage : utf-8 --

import scrapy
from scrapy.http import Request
from ueinfo.items import UeinfoItem

classe MrueSpider(scrapy.Spider):

name = 'mrue' allowed_domains = ['jd.com'] start_urls = ['http://jd.com/'] def parse(self, response): key="手机" for i in range(1,2): url="https://search.jd.com/Search?keyword="+str(key)+"&enc=utf-8&page="+str((i*2)-1) #print(url) yield Request(url=url,callback=self.page) def page(self,response): #body=response.body.decode("utf-8","ignore") allid=response.xpath("//p[@class='p-focus']//a/@data-sku").extract() for j in range(0,len(allid)): thisid=allid[j] url1="https://item.jd.com/"+str(thisid)+".html" #print(url1) yield Request(url=url1,callback=self.next) def next(self,response): item=UeinfoItem() item["pinpai"]=response.xpath("//ul[@id='parameter-brand']/li/@title").extract() #print(item["pinpai"]) item["xinghao"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='型号']/following::*[1]").extract() #print(item["xinghao"]) item["nianfen"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='上市年份']/following::*[1]").extract() #print(item["nianfen"]) item["yuefen"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='上市月份']/following::*[1]").extract() #print(item["yuefen"]) item["caozuoxt"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='操作系统']/following::*[1]").extract() #print(item["caozuoxt"]) item["cpupp"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='CPU品牌']/following::*[1]").extract() #print(item["cpupp"]) item["cpuhs"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='CPU核数']/following::*[1]").extract() #print(item["cpuhs"]) item["cpuxh"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='CPU型号']/following::*[1]").extract() #print(item["cpuxh"]) item["shuangkalx"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='双卡机类型']/following::*[1]").extract() #print(item["shuangkalx"]) item["mfnetwangl"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='4G网络']/following::*[1]").extract() #print(item["mfnetwangl"]) item["fnetwangl"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='网络频率（4G）']/following::*[1]").extract() #print(item["fnetwangl"]) item["netwanglplus"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='指纹识别']/following::*[1]").extract() #print(item["netwanglplus"]) item["volte"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='高清语音通话（VOLTE）']/following::*[1]").extract() #print(item["volte"]) item["screenstyle"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='主屏幕尺寸（英寸）']/following::*[1]").extract() #print(item["screenstyle"]) item["fenbiel"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='分辨率']/following::*[1]").extract() #print(item["fenbiel"]) item["dianchirl"]=response.xpath("//p[@class='Ptable']//p[@class='Ptable-item']//dl//dt[text()='电池容量（mAh）']/following::*[1]").extract() #print(item["dianchirl"]) yield item

pipelines est le suivant :

-- codage : utf-8 --

importer pymysql

classe UeinfoPipeline(objet):

def __init__(self): self.conn=pymysql.connect(host="127.0.0.1",user="root",passwd="root",db="mysql") def process_item(self, item, spider): try: pinpai=item["pinpai"][0] xinghao=item["xinghao"][0] nianfen=item["nianfen"][0] yuefen=item["yuefen"][0] caozuoxt=item["caozuoxt"][0] coupp=item["cpupp"][0] cpuhs=item["cpuhs"][0] cpuxh=item["cpuxh"][0] shuangkalx=item["shuangkalx"][0] mfnetwangl=item["mfnetwangl"][0] fnetwangl = item["fnetwangl"][0] netwanglplus=item["netwanglplus"][0] volte=item["volte"][0] screenstyle=item["screenstyle"][0] fenbiel=item["fenbiel"][0] dianchirl=item["dianchirl"][0] sql="insert into uems(pinpai,xinghao,nianfen,yuefen,caozuoxt,cpupp,cpuhs,cpuxh,shuangkalx,mwangluo,fwangluo,wangluoplus,volte,screenstyle,fenbian,dianchi)VALUES('"+pinpai+"','"+xinghao+"','"+nianfen+"','"+yuefen+"','"+caozuoxt+"','"+coupp+"','"+cpuhs+"','"+cpuxh+"','"+shuangkalx+"','"+mfnetwangl+"','"+fnetwangl+"','"+netwanglplus+"','"+volte+"','"+screenstyle+"','"+fenbiel+"','"+dianchirl+"')" self.conn.query(sql) #print(mfnetwangl) return item except Exception as err: pass def close_spider(self): self.conn.close()