我的第一个 scrapy 爬虫软件

安装 python

这个就不用我说了吧，网上教程一大堆

安装 scrapy 包

pip install scrapy

创建 scrapy 项目

scrapy startproject aliSpider

进入项目目录下，创建爬虫文件

cmd 进入项目目录，执行命令：

scrapy genspider -t crawl alispi job.alibaba.com

编写 items.py 文件

# -*- coding: utf-8 -*-

# Define here the models for your scraped items
#
# See documentation in:
# https://doc.scrapy.org/en/latest/topics/items.html

import scrapy


class AlispiderItem(scrapy.Item):
    # define the fields for your item here like:
    detail = scrapy.Field()
    workPosition = scrapy.Field()
    jobclass = scrapy.Field()

编写 alispi.py 文件

# -*- coding: utf-8 -*-
import scrapy
from scrapy.linkextractors import LinkExtractor
from scrapy.spiders import CrawlSpider, Rule
from aliSpider.items import AlispiderItem


class AlispiSpider(CrawlSpider):
    name = 'alispi'
    allowed_domains = ['job.alibaba.com']
    start_urls = ['https://job.alibaba.com/zhaopin/positionList.html#page/0']
    pagelink = LinkExtractor(allow=("\d+"))
    rules = (
        Rule(pagelink, callback='parse_item', follow=True),
    )

    def parse_item(self, response):
        # for each in response.xpath("//tr[@style='display:none']"):
        for each in response.xpath("//tr"):
            item = AlispiderItem()
            # 职位名称
            item['detail'] = each.xpath("./td[1]/span/a/@href").extract()
            # # # 详情连接
            item['workPosition'] = each.xpath("./td[3]/span/text()").extract()
            # # # 职位类别
            item['jobclass'] = each.xpath("./td[2]/span/text()").extract()
            yield item

执行

scrapy crawl alispi

输出到文件 items.json

scrapy crawl alispi -o items.json

执行成功会显示如下内容

版本说明

python 3.5.5

参考：https://scrapy-chs.readthedocs.io/zh_CN/0.24/topics/selectors.html

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