6.1.爬取第一页的职位信息
第一页职位信息
from selenium import webdriver
from lxml import etree
import re
import time class LagouSpider(object):
def __init__(self):
self.driver = webdriver.Chrome()
#python职位
self.url = 'https://www.lagou.com/jobs/list_python?labelWords=&fromSearch=true&suginput='
self.position = [] def run(self):
self.driver.get(self.url)
source = self.driver.page_source
self.parse_list_page(source) def parse_list_page(self,source):
html = etree.HTML(source)
links = html.xpath("//a[@class='position_link']/@href")
#每一页的所有职位的详情url
for link in links:
self.request_detail_page(link)
time.sleep(1) def request_detail_page(self,url):
self.driver.get(url)
#获取职位详情页的源代码
source = self.driver.page_source
self.parse_detail_page(source) def parse_detail_page(self,source):
html = etree.HTML(source)
position_name = html.xpath("//span[@class='name']/text()")[0]
job_request_spans = html.xpath("//dd[@class='job_request']//span")
salary = job_request_spans[0].xpath('.//text()')[0].strip()
city = job_request_spans[1].xpath('.//text()')[0].strip()
city = re.sub(r"[\s/]","",city)
work_years = job_request_spans[2].xpath('.//text()')[0].strip()
work_years = re.sub(r"[\s/]","",work_years)
education = job_request_spans[3].xpath('.//text()')[0].strip()
education = re.sub(r"[\s/]","",education)
desc = "".join(html.xpath("//dd[@class='job_bt']//text()")).strip()
position = {
'name':position_name,
'salary':salary,
'city': city,
'work_years': work_years,
'education': education,
'desc': desc,
}
self.position.append(position)
print(position)
print('-'*200) if __name__ == '__main__':
spider = LagouSpider()
spider.run()
6.2.爬取所有页的职位信息
from selenium import webdriver
from lxml import etree
import re
import time
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By class LagouSpider(object):
def __init__(self):
self.driver = webdriver.Chrome()
#python职位
self.url = 'https://www.lagou.com/jobs/list_python?city=%E5%8C%97%E4%BA%AC&cl=false&fromSearch=true&labelWords=&suginput='
self.position = [] def run(self):
self.driver.get(self.url)
while True:
source = self.driver.page_source
WebDriverWait(driver=self.driver,timeout=20).until(
EC.presence_of_element_located((By.XPATH,"//div[@class='pager_container']/span[last()]"))
)
self.parse_list_page(source)
#点“下一页”
next_btn = self.driver.find_element_by_xpath(
"//div[@class='pager_container']/span[last()]")
if "pager_next_disabled" in next_btn.get_attribute("class"):
break
else:
next_btn.click()
time.sleep(1) def parse_list_page(self,source):
html = etree.HTML(source)
links = html.xpath("//a[@class='position_link']/@href")
#每一页的所有职位的详情url
for link in links:
self.request_detail_page(link)
time.sleep(1) def request_detail_page(self,url):
# self.driver.get(url)
self.driver.execute_script("window.open('%s')"%url)
self.driver.switch_to.window(self.driver.window_handles[1]) WebDriverWait(driver=self.driver,timeout=20).until(
EC.presence_of_element_located((By.XPATH,"//div[@class='job-name']/span[@class='name']"))
)
#获取职位详情页的源代码
source = self.driver.page_source
self.parse_detail_page(source)
#关闭当前详情页，并且切换到列表页
self.driver.close()
self.driver.switch_to.window(self.driver.window_handles[0]) def parse_detail_page(self,source):
html = etree.HTML(source)
position_name = html.xpath("//span[@class='name']/text()")[0]
job_request_spans = html.xpath("//dd[@class='job_request']//span")
salary = job_request_spans[0].xpath('.//text()')[0].strip()
city = job_request_spans[1].xpath('.//text()')[0].strip()
city = re.sub(r"[\s/]","",city)
work_years = job_request_spans[2].xpath('.//text()')[0].strip()
work_years = re.sub(r"[\s/]","",work_years)
education = job_request_spans[3].xpath('.//text()')[0].strip()
education = re.sub(r"[\s/]","",education)
desc = "".join(html.xpath("//dd[@class='job_bt']//text()")).strip()
company_name = html.xpath("//h2[@class='fl']/text()")[0].strip()
position = {
'name':position_name,
'company_name':company_name,
'salary':salary,
'city': city,
'work_years': work_years,
'education': education,
'desc': desc,
}
self.position.append(position)
print(position)
print('-'*200) if __name__ == '__main__':
spider = LagouSpider()
spider.run()