文章目录

• 前言
• 一、首先分析网页
• 二、编写代码
• 总结

前言

这次主要是获取一个快手小店后台的评价数据和小额打款。采用的是selenium，因为据说这个网站的反爬比较麻烦。使用selenium的话直接可以无视大部分网站的反爬。因为这篇的主题是selenium的使用，所以我会着重分析selenium需要定位的元素。至于获取到网页源码后的数据提取我会略过，可以自己根据代码分析。先来看看效果吧。

编写代码

1.分析网页

首先肯定是登录，找到我是店员的标签。 然后是找到手机号、密码和登录按钮的标签，这个网页并没有验证码。 登录以后找到评价管理。 然后是搜索的参数评价时间，分别是开始时间和结束时间。结束时间的标签就在开始时间标签的下方，我就不单独截图了。这里要注意的是，这俩个的参数不是在这里输入的，需要在点击其中一个后弹出来的界面输入。 这里要注意的是你必须先模拟点击俩个日期，然后再在上面的输入框内输入。不然它会将你输入的重置。还有输入框必须先模拟输入ctrl+a全选再输入，不然上面淡淡的开始日期这些字还会在。这俩点必须要注意！！！ 这些输入好后我们就可以点击确定，然后点击筛选。 接下来就是获取每一页的评价了。因为有很多页，所以需要模拟点击下一页。当到最后一页时，这个标签会多出来一个disabled的属性。当然每次筛选的也就只会出现100页，你也可以使用for循环，但使用这种方法的话会有一个缺点，就是当你搜索的时间比较短的话，评价数量可能会不够100页。所以并不推荐。 评价管理完毕后就到了小额打款。 首先点击小额打款，然后点击打款记录。 但这里要注意的是点击小额打款后出现的页面里并没有打款记录。需要点击立即使用后才会出现打款记录，而且需要先最大化浏览器然后点击确认，不然是无法点击到立即使用的。 进入到打款记录后，这里要输入的搜索参数有俩个，分别是申请时间和成功时间。 这里输入的方法和评价管理的输入参数输入方法是一样的，我就不重复了。

2.编写代码

这次我写的注释比较详细，我就不一步步介绍每一段代码的作用了。直接上总的代码。

#coding:utf-8
from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from lxml import etree
from queue import Queue
from openpyxl import Workbook
import time
import threading
import re

class DDThread(threading.Thread):
    #评价解析多线程类
    def __init__(self, queue):
        threading.Thread.__init__(self)
        self.dd_queue = queue
        self.dd_data = []
    def run(self):
        while not self.dd_queue.empty():   #当队列不为空
            html = self.dd_queue.get()
            data = jx_dd(html)
            if data != False:
                self.dd_data.append(data)

class DKThread(threading.Thread):
    # 打款解析多线程类
    def __init__(self, queue):
        threading.Thread.__init__(self)
        self.dk_queue = queue
        self.dk_data = []
    def run(self):
        while not self.dk_queue.empty():   #当队列不为空
            html = self.dk_queue.get()
            data = jx_dk(html)
            if data != False:
                self.dk_data.append(data)

def jx_dd(html):
    try:
        #解析评价数据
        xp = etree.HTML(html)
        dd_date_one = []
        # comlist = xp.xpath('//div[@class="comment-list"]/div')
        #当前页码
        page = xp.xpath('//*[@class="number active"]/text()')[0]
        for i in range(1,11):
            # com = comlist[i]
            # text = xp.xpath(f'//div[@class="comment-list"]/div[{i}]//text()')
            # print(text)
            #订单号
            ddh = xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="oid-value"]/text()')[0]
            #买家昵称
            mjnc = xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="nickname"]/text()')[0]
            #买家ID
            mjid = xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="userid"]/text()')[0]
            #商品
            sp = xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="good-name"]/text()')[0]
            #数量
            sl = xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="sku-desc"]/text()')[0]
            #价格
            jg = xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="sku-price"]/text()')[0]
            #评论时间
            plsj = xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="main-comment"]/div[@class="date"]/text()')[0]
            #评论
            pl = xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="main-comment"]/div[@class="content"]/text()')[0]
            #追评时间
            zpsj = xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="attach-comment"]/div[@class="date"]/text()')
            if len(zpsj) != 0:
                zpsj = zpsj[0]
            else:
                zpsj = '无'
            #追评
            zp = xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="attach-comment"]/div[@class="content"]/text()')
            if len(zp) != 0:
                zp = zp[0]
            else:
                zp = '无'
            #评分
            #商品质量
            spzl = len(xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="td star-rating"]/div/div[1]/div[@class="star"]'))
            #用*表示
            spzl = '*'*spzl
            #服务态度
            fwtd = len(xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="td star-rating"]/div/div[2]/div[@class="star"]'))
            # 用*表示
            fwtd = '*' * fwtd
            #物流服务
            wlfw = len(xp.xpath(f'//div[@class="comment-list"]/div[{i}]//*[@class="td star-rating"]/div/div[3]/div[@class="star"]'))
            # 用*表示
            wlfw = '*' * wlfw
            #pf = ''.join([str(spzl),str(fwtd),str(wlfw)])
            # print({'订单号': ddh,'买家昵称': mjnc,'买家ID': mjid,'商品': sp,'数量': sl,'价格': jg,'评论时间': plsj,'评论': pl,'追评时间': zpsj,'追评': zp,'评分': pf})
            dd_date_one.append({'订单号': ddh,'买家昵称': mjnc,'买家ID': mjid,'商品': sp,'数量': sl,'价格': jg,'评论时间': plsj,'评论': pl,'追评时间': zpsj,'追评': zp,'商品质量': str(spzl),'服务态度':str(fwtd),'物流服务':str(wlfw)})
        print('订单第', page, '页已解析完成')
        return {page: dd_date_one}
    except BaseException:
        print('无数据')
        return False

def jx_dk(html):
    try:
        #解析打款数据
        xp = etree.HTML(html)
        dk_date_one = []
        #提取总数目
        nu = xp.xpath('//*[@class="ant-pagination-total-text"]/text()')[0]
        num = re.findall('\d+', nu, re.S)[0]
        #提取总页数
        total_page = xp.xpath('//ul[@unselectable="unselectable"]/li[last()-1]/a/text()')[0]
        #最后一页记录的数目
        last_num = int(num)-20*(int(total_page)-1)
        #当前页数
        page = xp.xpath('//*[contains(@class, "ant-pagination-item-active")]/a/text()')[0]
        #当数据不为最后一页时
        if page != total_page:
            for i in range(1, 21):
                #订单编号
                ddbh = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[1]/a/text()')[0]
                #商品ID
                spid = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[2]/a/text()')[0]
                #买家ID
                mjid = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[3]/text()')[0]
                #打款类型
                dklx = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[4]/text()')[0]
                #打款金额
                dkje = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[5]/span/text()')[0]
                #留言
                ly = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[6]/text()')
                if len(ly) == 0:
                    ly = '无'
                else:
                    ly = ly[0]
                #申请时间
                sqsj = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[7]/text()')[0]
                #成功时间
                cgsj = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[8]/text()')[0]
                #打款状态
                dkzt = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[9]/text()')[0]
                #操作人
                czr = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[10]/text()')[0]
                #审批人
                spr = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[11]/text()')[0]
                # print({'订单编号': ddbh, '商品ID': spid, '买家ID': mjid, '打款类型': dklx, '打款金额': dkje, '留言': ly, '申请时间': sqsj, '成功时间': cgsj, '打款状态': dkzt, '操作人': czr, '审批人': spr})
                dk_date_one.append({'订单编号': ddbh, '商品ID': spid, '买家ID': mjid, '打款类型': dklx, '打款金额': dkje, '留言': ly, '申请时间': sqsj, '成功时间': cgsj, '打款状态': dkzt, '操作人': czr, '审批人': spr})
        else:
            for i in range(1, last_num+1):
                #订单编号
                ddbh = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[1]/a/text()')[0]
                #商品ID
                spid = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[2]/a/text()')[0]
                #买家ID
                mjid = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[3]/text()')[0]
                #打款类型
                dklx = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[4]/text()')[0]
                #打款金额
                dkje = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[5]/span/text()')[0]
                #留言
                ly = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[6]/text()')
                if len(ly) == 0:
                    ly = '无'
                else:
                    ly = ly[0]
                #申请时间
                sqsj = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[7]/text()')[0]
                #成功时间
                cgsj = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[8]/text()')[0]
                #打款状态
                dkzt = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[9]/text()')[0]
                #操作人
                czr = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[10]/text()')[0]
                #审批人
                spr = xp.xpath(f'//div[@class="ant-table ant-table-default ant-table-bordered ant-table-scroll-position-left"]//tbody[@class="ant-table-tbody"]/tr[{i}]/td[11]/text()')[0]
                # print({'订单编号': ddbh, '商品ID': spid, '买家ID': mjid, '打款类型': dklx, '打款金额': dkje, '留言': ly, '申请时间': sqsj, '成功时间': cgsj, '打款状态': dkzt, '操作人': czr, '审批人': spr})
                dk_date_one.append({'订单编号': ddbh, '商品ID': spid, '买家ID': mjid, '打款类型': dklx, '打款金额': dkje, '留言': ly, '申请时间': sqsj, '成功时间': cgsj, '打款状态': dkzt, '操作人': czr, '审批人': spr})
        print('小额打款第', page, '页已解析完成')
        return {page: dk_date_one}
    except BaseException:
        print('小额打款无数据')
        return False

def get_html(url):
    #打开谷歌浏览器
    wd = webdriver.Chrome()
    #发起请求
    wd.get(url)
    time.sleep(3)
    #点击我是店员
    i = wd.find_element_by_xpath('//*[@id="root"]//div[@class="choose-account-type"]/div[2]')
    i.click()
    time.sleep(1)
    # 点击账号登录
    input_account = wd.find_element_by_xpath('//*[@placeholder="请输入手机号"]')
    input_account.send_keys('你的账号')
    time.sleep(1)
    # 输入密码
    input_password = wd.find_element_by_xpath('//*[@placeholder="请输入密码"]')
    input_password.send_keys('你的密码')
    time.sleep(1)
    # 点击登录按钮
    login_button = wd.find_element_by_xpath('//*[@class="ant-btn"]')
    login_button.click()
    time.sleep(1)
    #点击订单管理
    wd.get('https://s.kwaixiaodian.com/order/comments')
    time.sleep(2)

    #时间筛选
    #点击时间
    start_time_button = wd.find_element_by_xpath('//*[@class="el-date-editor el-range-editor el-input__inner el-date-editor--datetimerange"]//*[@placeholder="开始时间"]')
    start_time_button.click()
    time.sleep(2)
    #输入开始日期
    start_date = wd.find_element_by_xpath('//*[@class="el-date-range-picker__editor el-input el-input--small"]/*[@placeholder="开始日期"]')
    start_date.send_keys(Keys.CONTROL, 'a')
    start_date.send_keys('2021-03-11')
    #输入开始时间
    start_time = wd.find_element_by_xpath('//*[@class="el-date-range-picker__editor el-input el-input--small"]/*[@placeholder="开始时间"]')
    start_time.send_keys(Keys.CONTROL, 'a')
    start_time.send_keys('00:00:00')
    #输入结束日期
    end_date = wd.find_element_by_xpath('//*[@class="el-date-range-picker__editor el-input el-input--small"]/*[@placeholder="结束日期"]')
    end_date.send_keys(Keys.CONTROL, 'a')
    end_date.send_keys('2021-04-11')
    #输入结束时间
    end_time = wd.find_element_by_xpath('//*[@class="el-date-range-picker__editor el-input el-input--small"]/*[@placeholder="结束时间"]')
    end_time.send_keys(Keys.CONTROL, 'a')
    end_time.send_keys('23:59:59')
    #点击确定
    queding_button = wd.find_element_by_xpath('//*[@class="el-button el-picker-panel__link-btn el-button--default el-button--mini is-plain"]')
    queding_button.click()
    #点击筛选
    shaixuan_button = wd.find_element_by_xpath('//*[@type="submit"]')
    shaixuan_button.click()
    time.sleep(2)

    #将网页源代码送入队列
    dd_data_que = Queue()
    dd_data_que.put(wd.page_source)
    #数字为总页数-1
    for i in range(99):
    #使用小数目来进行测试
    # for i in range(5):
        dd_next_page = wd.find_element_by_xpath('//button[@class ="btn-next"]')
        dd_next_page.click()
        time.sleep(2)
        dd_data_que.put(wd.page_source)

    #访问小额打款
    wd.get('https://s.kwaixiaodian.com/refund/small-transfer')
    time.sleep(2)
    #最大化页面
    wd.maximize_window()
    #点击确认
    ljsy = wd.find_element_by_xpath('//button[@class="ant-btn ant-btn-primary ant-btn-lg"]')
    ljsy.click()
    #点击打款记录
    dakuanjilu_button = wd.find_element_by_xpath('//*[@class="ant-tabs-nav ant-tabs-nav-animated"]/div/div[2]')
    dakuanjilu_button.click()
    time.sleep(2)

    #时间筛选
    #点击申请时间
    sq_button = wd.find_element_by_xpath('//*[@class="ant-form-item-control has-success"]//*[@placeholder="开始日期"]')
    sq_button.click()
    time.sleep(2)
    #输入申请头时间
    sq_start_time = wd.find_element_by_xpath('//*[@class="ant-calendar-date-input-wrap"]/*[@placeholder="开始日期"]')
    sq_start_time.send_keys(Keys.CONTROL, 'a')
    sq_start_time.send_keys('2020-12-02 00:00:00')
    time.sleep(2)
    #输入申请尾时间
    sq_end_time = wd.find_element_by_xpath('//*[@class="ant-calendar-date-input-wrap"]/*[@placeholder="结束日期"]')
    sq_end_time.send_keys(Keys.CONTROL, 'a')
    sq_end_time.send_keys('2021-03-25 23:59:59')
    time.sleep(2)
    #点击确认
    qr_button1 = wd.find_element_by_xpath('//*[@class="ant-calendar-ok-btn"]')
    qr_button1.click()
    time.sleep(2)

    #点击成功时间
    cg_button = wd.find_element_by_xpath('//*[@id="RecordForm_reachTime"]//*[@placeholder="开始日期"]')
    cg_button.click()
    time.sleep(2)
    #点击俩个日期
    rq1 = wd.find_element_by_xpath('//*[@class="ant-calendar-tbody"]/tr[2]/td[1]')
    rq1.click()
    time.sleep(2)
    rq2 = wd.find_element_by_xpath('//*[@class="ant-calendar-tbody"]/tr[2]/td[2]')
    rq2.click()
    #输入成功头时间
    cg_start_time = wd.find_element_by_xpath('//*[@class="ant-calendar-input-wrap"]//*[@placeholder="开始日期"]')
    cg_start_time.send_keys(Keys.CONTROL, 'a')
    cg_start_time.send_keys('2021-08-10 16:25:33')
    time.sleep(2)
    #输入成功尾时间
    cg_end_time = wd.find_element_by_xpath('//*[@class="ant-calendar-input-wrap"]//*[@placeholder="结束日期"]')
    cg_end_time.send_keys(Keys.CONTROL, 'a')
    cg_end_time.send_keys('2021-08-27 16:25:33')
    time.sleep(2)
    #点击确认
    qr_button2 = wd.find_element_by_xpath('//*[@class="ant-calendar-ok-btn"]')
    qr_button2.click()
    time.sleep(2)

    #点击筛选
    sx_button = wd.find_element_by_xpath('//*[@style="text-align: right; padding: 0px 12px;"]//*[@class="ant-btn ant-btn-primary"]')
    sx_button.click()
    time.sleep(2)
    # while True:
    #     pass

    #将网页源代码送入队列
    dk_data_que = Queue()
    dk_data_que.put(wd.page_source)
    # for i in range(47):
    # 使用小数目来进行测试
    # for i in range(5):
    try:
        while True:
            dk_next_page = wd.find_element_by_xpath('//*[@title="下一页" and @tabindex="0"]')
            dk_next_page.click()
            dk_data_que.put(wd.page_source)
            time.sleep(2)
    except BaseException:
        print('结束翻页，关闭浏览器')
    #关闭浏览器
    wd.quit()
    #返回存放网页源代码的队列
    data = (dd_data_que, dk_data_que)
    # data = dk_data_que
    return data

def write_dd(datas):
    wb = Workbook()
    ws = wb.create_sheet('评价管理', 0)
    ws['A1'] = '订单号'
    ws['B1'] = '买家昵称'
    ws['C1'] = '买家ID'
    ws['D1'] = '商品'
    ws['E1'] = '数量'
    ws['F1'] = '价格'
    ws['G1'] = '评论时间'
    ws['H1'] = '评论'
    ws['I1'] = '追评时间'
    ws['J1'] = '追评'
    ws['K1'] = '商品质量'
    ws['L1'] = '服务态度'
    ws['M1'] = '物流服务'
    ws['N1'] = '页数'
    hang = 2    #当前写入到的行数
    for data_one_page in datas:
        page = list(data_one_page.keys())[0]
        for data_one in list(data_one_page.values())[0]:
            ws[f'A{hang}'] = data_one['订单号']
            ws[f'B{hang}'] = data_one['买家昵称']
            ws[f'C{hang}'] = data_one['买家ID']
            ws[f'D{hang}'] = data_one['商品']
            ws[f'E{hang}'] = data_one['数量']
            ws[f'F{hang}'] = data_one['价格']
            ws[f'G{hang}'] = data_one['评论时间']
            ws[f'H{hang}'] = data_one['评论']
            ws[f'I{hang}'] = data_one['追评时间']
            ws[f'J{hang}'] = data_one['追评']
            # ws[f'K{hang}'] = data_one['评分']
            ws[f'K{hang}'] = data_one['商品质量']
            ws[f'L{hang}'] = data_one['服务态度']
            ws[f'M{hang}'] = data_one['物流服务']
            ws[f'N{hang}'] = page
            hang += 1
    wb.save('评价管理.xlsx')

def write_dk(datas):
    wb = Workbook()
    ws = wb.create_sheet('小额打款', 0)
    ws['A1'] = '订单编号'
    ws['B1'] = '商品ID'
    ws['C1'] = '买家ID'
    ws['D1'] = '打款类型'
    ws['E1'] = '打款金额'
    ws['F1'] = '留言'
    ws['G1'] = '申请时间'
    ws['H1'] = '成功时间'
    ws['I1'] = '打款状态'
    ws['J1'] = '操作人'
    ws['K1'] = '审批人'
    ws['L1'] = '页数'
    hang = 2  # 当前写入到的行数
    for data_one_page in datas:
        page = list(data_one_page.keys())[0]
        for data_one in list(data_one_page.values())[0]:
            ws[f'A{hang}'] = data_one['订单编号']
            ws[f'B{hang}'] = data_one['商品ID']
            ws[f'C{hang}'] = data_one['买家ID']
            ws[f'D{hang}'] = data_one['打款类型']
            ws[f'E{hang}'] = data_one['打款金额']
            ws[f'F{hang}'] = data_one['留言']
            ws[f'G{hang}'] = data_one['申请时间']
            ws[f'H{hang}'] = data_one['成功时间']
            ws[f'I{hang}'] = data_one['打款状态']
            ws[f'J{hang}'] = data_one['操作人']
            ws[f'K{hang}'] = data_one['审批人']
            ws[f'L{hang}'] = page
            hang += 1
    wb.save('小额打款.xlsx')

if __name__ == '__main__':
    url = 'https://s.kwaixiaodian.com/refund/small-transfer'
    dk_dd_data_que = get_html(url)
    #使用多线程进行解析数据
    th1 = DDThread(dk_dd_data_que[0])
    th2 = DKThread(dk_dd_data_que[1])
    # th2 = DKThread(dk_dd_data_que)
    th1.start()
    th2.start()
    th1.join()
    th2.join()
    dd_data = th1.dd_data   #存放评价数据
    dk_data = th2.dk_data   #存放打款数据
    if len(dd_data) != 0:
        write_dd(dd_data)
    if len(dk_data) !=0:
        write_dk(dk_data)

总结

写了这么多篇selenium的使用，相信大家看到这对于selenium应该使用的比较得心应手了。selenium的使用难度很低，唯一的难度就是元素的定位，这点只要将bs4或者xpath使用的比较好就没有啥问题了。