【Scrapy】爬取北京公交代码导入Mysql数据库全代码展示全流程满S评分一命通关教程

【Scrapy】爬取北京公交代码导入Mysql数据库全代码展示全流程满S评分一命通关教程

前置准备：【需要的软件】：PyCharm,Mysql,Navicat(这个可有可无)

【需要的知识】：会下载Scrapy(注意解释器)，会打开mysql

先建包，PyCharm终端里敲三个命令三次回车

scrapy startproject work

cd work

scrapy genspider bei_bus beijing.8684.cn

打开新建的文件

bei_bus.py代码

from urllib.parse import urljoin
import scrapy
from scrapy import FormRequest, Request
from work.items import WorkItem


class BeiBusSpider(scrapy.Spider):
    name = 'bei_bus'
    allowed_domains = ['beijing.8684.cn']
    start_urls = 'http://beijing.8684.cn/'

    def start_requests(self):
        for page in range(2):
            url = '{url}/list{page}'.format(url=self.start_urls, page=(page + 1))
            yield FormRequest(url, callback=self.parse_index)

    def parse_index(self, response):
        hrefs = response.xpath("//div[@class='cc-content service-area']/div[@class='list clearfix']/a/@href").extract()
        for href in hrefs:
            url2 = urljoin(self.start_urls, href)
            yield Request(url2, callback=self.parse_detail)

    def parse_detail(self, response):
        name = response.xpath('//h1[@]/text()').extract_first()
        type = response.xpath('//a[@]/text()').extract_first()
        time = response.xpath('//ul[@]/li[1]/text()').extract_first()
        trip = response.xpath('//div[@]/text()').extract()
        luxian = response.xpath('//div[@]/ol/li/a/text()').extract()

        bus_item = WorkItem()
        for field in bus_item.fields:
            bus_item[field] = eval(field)
        yield bus_item

settings.py代码

BOT_NAME = 'work'

SPIDER_MODULES = ['work.spiders']
NEWSPIDER_MODULE = 'work.spiders'

ROBOTSTXT_OBEY = False

DEFAULT_REQUEST_HEADERS = {
   'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
   'Accept-Language':'en',
   'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36 Edg/94.0.992.47'
}

ITEM_PIPELINES = {
   'work.pipelines.WorkPipeline': 300,
}

DB_HOST='localhost'
DB_USER='root'  //你的用户名
DB_PWD='123456'  //你的密码
DB_CHARSET='UTF8'
DB='busdb'

pipelines.py代码

import pymysql
from itemadapter import ItemAdapter

from work import settings


class WorkPipeline:
    def __init__(self):
        self.host = settings.DB_HOST
        self.user = settings.DB_USER
        self.pwd = settings.DB_PWD
        self.db = settings.DB
        self.charset = settings.DB_CHARSET
        self.connect()

    def connect(self):
        self.conn = pymysql.Connect(host=self.host,
                                    user=self.user,
                                    password=self.pwd,
                                    db=self.db,
                                    charset=self.charset)
        self.cursor = self.conn.cursor()

    def close_spider(self, spider):
        self.conn.close()
        self.cursor.close()

    def process_item(self, item, spider):
        sql = 'insert into businfo2(name,type,time,trip,luxian) values("%s","%s","%s","%s","%s")' % (item['name'], item['type'], item['time'], item['trip'], item['luxian'])
        self.cursor.execute(sql)
        self.conn.commit()
        return item

items.py代码

import scrapy


class WorkItem(scrapy.Item):
    # define the fields for your item here like:
    # name = scrapy.Field()
    name = scrapy.Field()
    type = scrapy.Field()
    time = scrapy.Field()
    trip = scrapy.Field()
    luxian = scrapy.Field()

最后建表

用Navicat查看，最终效果图：

 

 

注意：settings文件有些是在注释基础上改动的，User-Agent从自己浏览器找。

官网：北京公交查询_北京公交车线路查询_北京公交地图 - 北京公交网 (8684.cn)