本文中我們將詳細介紹使用Scrapy抓取數(shù)據(jù)并存入MongoDB數(shù)據(jù)庫，首先給出我們需要抓取得數(shù)據(jù)：

抓取起點網(wǎng)得全部作品，網(wǎng)址為：https://www.qidian.com/all

關(guān)于Scrapy的下載與安裝請移步上篇博客Scrapy簡單案例

關(guān)于MongoDB的下載安裝請移步博客MongoDB安裝

下面直接給出相關(guān)代碼;

(1) 數(shù)據(jù)封裝類item.py

# -*- coding: utf-8 -*-# Define here the models for your scraped items # # See documentation in: # https://doc.scrapy.org/en/latest/topics/items.htmlimport scrapyclass NovelItem(scrapy.Item):# define the fields for your item here like:# name = scrapy.Field()link = scrapy.Field()#URLcategory = scrapy.Field()bookname = scrapy.Field()author = scrapy.Field()content = scrapy.Field()

（2）爬蟲主程序

# -*- coding: utf-8 -*- import scrapyfrom novel.items import NovelItemclass SolveSpider(scrapy.Spider):name = "solve"allowed_domains = ["qidian.com"]start_urls = [];for x in range(1,5):#只有5頁start_urls.append("https://www.qidian.com/all?orderId=&style=1&pageSize=20&siteid=1&pubflag=0&hiddenField=0&page=" + str(x))#start_urls = ["https://www.qidian.com/all?orderId=&style=1&pageSize=20&siteid=1&pubflag=0&hiddenField=0&page="]# page_index = ["1", "2", "3", "4", "5", "6", "7","8", "9", "10"]def parse(self, response):nolves = response.xpath('//ul[@class="all-img-list cf"]/li')for each in nolves:# print("***************************")item = NovelItem()part = each.xpath('./div[@class="book-mid-info"]')#print(part)item['bookname'] = part.xpath('./h4/a/text()').extract()[0]item['link'] = part.xpath('./h4/a/@href').extract()[0]item['author'] = part.xpath('./p[@class="author"]/a[@class="name"]/text()').extract()[0]item['category'] = part.xpath('./p[@class="author"]/a/text()').extract()[1]item['content'] = part.xpath('./p[@class="intro"]/text()').extract()[0]yield item

（3）管道pipeline.py

import pymongoclass MongoDBPipeline(object):collection_name = 'scrapy_items'def __init__(self, mongo_uri, mongo_db):self.mongo_uri = mongo_uriself.mongo_db = mongo_db@classmethoddef from_crawler(cls, crawler):return cls(mongo_uri=crawler.settings.get('MONGO_URI'),mongo_db=crawler.settings.get('MONGO_DB'),)def open_spider(self, spider):self.client = pymongo.MongoClient(self.mongo_uri)self.db = self.client[self.mongo_db]self.collection = self.db["novel"]def close_spider(self, spider):self.client.close()def process_item(self, item, spider):self.collection.insert(dict(item))print("插入成功")return item

（4）配置文件

BOT_NAME = 'novel'SPIDER_MODULES = ['novel.spiders'] NEWSPIDER_MODULE = 'novel.spiders' ITEM_PIPELINES = {'novel.pipelines.NovelPipeline':100,}MONGO_URI = "192.168.177.13" MONGO_DB = "novels" MONGO_COLLECTION = "novel" # Crawl responsibly by identifying yourself (and your website) on the user-agent #USER_AGENT = 'novel (+http://www.yourdomain.com)'# Obey robots.txt rules ROBOTSTXT_OBEY = True # 不驗證SSL證書 DOWNLOAD_HANDLERS_BASE = {'file': 'scrapy.core.downloader.handlers.file.FileDownloadHandler','http': 'scrapy.core.downloader.handlers.http.HttpDownloadHandler','https': 'scrapy.core.downloader.handlers.http.HttpDownloadHandler','s3': 'scrapy.core.downloader.handlers.s3.S3DownloadHandler', }

（5）查詢結(jié)果

總結(jié)

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