selenium+phantomjs爬取京东商品信息

selenium+phantomjs爬取京东商品信息

今天本身实战写了个爬取京东商品信息,和上一篇的思路同样,附上连接:https://www.cnblogs.com/cany/p/10897618.htmlhtml

打开 https://www.jd.com/ 首先不须要登录就可搜索,淘宝不同,因此淘宝我还没试过。python

开启F12 定位一下搜索框和搜索按钮web

input = WAIT.until(EC.presence_of_element_located((By.XPATH,'//*[@id="key"]')))
        submit = WAIT.until(EC.element_to_be_clickable((By.XPATH,'//*[@id="search"]/div/div[2]/button')))
        input.send_keys(goods)
        submit.click()

接下来咱们要的是按销量排名,那就要点击这个 onclick事件
enter description hereapp

发现使用click()仍是没法进行点击,由于这是个js跳转 因此得用下面代码测试

submit_js = WAIT.until(EC.element_to_be_clickable((By.XPATH, '//*[@id="J_filter"]/div[1]/div[1]/a[2]')))
browser.execute_script("$(arguments[0]).click()", submit_js)

接下来就仍是检测是否加载了下面的元素
enter description hereui

开始分析各项 怎么获取里面的数据就不说了
enter description herelua

这时候可能爬的不彻底,由于京东是动态加载的 须要去模拟一下把页面拉到底部spa

browser.execute_script("window.scrollTo(0,document.body.scrollHeight)")

按照这样子进行循环遍历,把每个值添加到goods_data列表里去,但也保证不了可能会出现找不到对象的属性,抛出AttributeError异常,这里已经尝试过了,因此写下这个异常处理!excel

而后获取完一页就下一页,而后得写个代码来检查是否跳转到指定页面code

WAIT.until(EC.text_to_be_present_in_element((By.CSS_SELECTOR,'#J_bottomPage > span.p-num > a.curr'),str(page_num)))

再获取每一页当前页面源码进行解析提取内容,保存到 goods_data 列表中,最后写入xls文件!

Tips:里面sleep 时间视状况而定,太快会致使获取不全,但若是网速快能弥补这一点,目前测试状况来看是这样子的问题!

附上代码:

from selenium import webdriver
from selenium.common.exceptions import TimeoutException
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
from bs4 import BeautifulSoup
import xlwt
import time


goods = input('请输入你要爬取的商品名称:')
goods_data = []
browser = webdriver.PhantomJS()
WAIT = WebDriverWait(browser,10)
browser.set_window_size(1000,600)


def seach(goods):
    try:
        print('开始自动化爬取京东商品信息......')
        browser.get('https://www.jd.com/')
        input = WAIT.until(EC.presence_of_element_located((By.XPATH,'//*[@id="key"]')))
        submit = WAIT.until(EC.element_to_be_clickable((By.XPATH,'//*[@id="search"]/div/div[2]/button')))
        input.send_keys(goods)
        submit.click()
        submit_js = WAIT.until(EC.element_to_be_clickable((By.XPATH, '//*[@id="J_filter"]/div[1]/div[1]/a[2]')))
        browser.execute_script("$(arguments[0]).click()", submit_js)
        time.sleep(1)
        get_source()
    except TimeoutException:
        return seach(goods)


def get_source():
    browser.execute_script("window.scrollTo(0,document.body.scrollHeight)")
    time.sleep(1)
    WAIT.until(EC.presence_of_element_located((By.CSS_SELECTOR,'#J_goodsList > ul')))
    html = browser.page_source
    soup = BeautifulSoup(html,'lxml')
    save_data(soup)


def save_data(soup):
    html = soup.find_all(class_='gl-i-wrap')
    for item in html:
        try:
            goods_name = item.find(class_='p-name').find('em').text
            goods_link = 'https:' + item.find(class_='p-img').find('a').get('href')
            goods_evaluate = item.find(class_='p-commit').text
            goods_store = item.find(class_='curr-shop').text
            goods_money = item.find(class_='p-price').find('i').text
            print(('爬取: ' + goods_name))
            goods_data.append([goods_name,goods_link,goods_evaluate,goods_store,goods_money])
        except AttributeError:
            pass


def next_page(page_num):
    try:
        print('获取下一页数据')
        next_btn = WAIT.until(EC.element_to_be_clickable((By.CSS_SELECTOR,'#J_bottomPage > span.p-num > a.pn-next')))
        next_btn.click()
        WAIT.until(EC.text_to_be_present_in_element((By.CSS_SELECTOR,'#J_bottomPage > span.p-num > a.curr'),str(page_num)))
        get_source()
    except TimeoutException:
        browser.refresh()
        return next_page(page_num)


def save_to_excel():
    book = xlwt.Workbook(encoding='utf-8', style_compression=0)
    sheet = book.add_sheet(goods, cell_overwrite_ok=True)
    sheet.col(0).width = 256 * 80
    sheet.col(1).width = 256 * 40
    sheet.col(2).width = 256 * 20
    sheet.col(3).width = 256 * 25
    sheet.col(4).width = 256 * 20
    sheet.write(0, 0, '商品名称')
    sheet.write(0, 1, '商品连接')
    sheet.write(0, 2, '评价人数')
    sheet.write(0, 3, '店名')
    sheet.write(0, 4, '价格')
    for item in goods_data:
        n = goods_data.index(item) + 1
        sheet.write(n, 0, item[0])
        sheet.write(n, 1, item[1])
        sheet.write(n, 2, item[2])
        sheet.write(n, 3, item[3])
        sheet.write(n, 4, item[4])
    book.save(str(goods) + u'.xls')


def main():
    try:
        seach(goods)
        for i in range(2,11):
            next_page(i)
        print('-'*50)
        print('数据爬取完毕,正在写入xls.....')
        save_to_excel()
        print('写入成功!!!')
    finally:
        browser.close()
        browser.quit()


if __name__ == '__main__':
    main()
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