第五次作业

作业1

1）、实验内容：

要求：

• 熟练掌握 Selenium 查找HTML元素、爬取Ajax网页数据、等待HTML元素等内容。
• 使用Selenium框架爬取京东商城某类商品信息及图片。

候选网站：http://www.jd.com/

关键词：学生自由选择

输出信息：MYSQL的输出信息如下

mNo	mMark	mPrice	mNote	mFile
000001	三星Galaxy	9199.00	三星Galaxy Note20 Ultra 5G...	000001.jpg
000002......

这个代码在ppt上有，我们只是做了一个复现。

代码如下：

from selenium import webdriver
from selenium.webdriver.chrome.options import Options
import urllib.request
import threading
import sqlite3
import os
import datetime
from selenium.webdriver.common.keys import Keys
import time
class JD:
    header = {
        "User-Agent": "Mozilla/5.0(Windows;U;Windows NT 6.0 x64;en-US;rv:1.9pre)Gecko/2008072531 Minefield/3.0.2pre"
    }
    # 图片存储的位置
    imagepath = "download"

    def startUp(self, url, key):
        chrome_options = Options()
        chrome_options.add_argument("——headless")
        chrome_options.add_argument("——disable-gpu")
        self.driver = webdriver.Chrome(chrome_options=chrome_options)
        self.threads = []
        self.No = 0
        self.imgNo = 0
        try:
            self.con = sqlite3.connect("phones.db")
            
            self.cursor = self.con.cursor()
            try:
                self.cursor.execute("drop table phones")
                
            except:
                pass
            try:
                sql = "create table phones(mNo varchar(32) primary key,mMark varchar(256),mPrice varchar(32),mNote varchar(1024),mFile varchar(256))"
                self.cursor.execute(sql)
            except:
                pass
        except Exception as err:
            print(err)
        try:
            if not os.path.exists(JD.imagepath):
                
                os.mkdir(JD.imagepath)
            images = os.listdir(JD.imagepath)
            for image in images:
                s = os.path.join(JD.imagepath, image)
                os.remove(s)
        except Exception as err:
            print(err)
        self.driver.get(url)
        keyinput = self.driver.find_element_by_id("key")
        keyinput.send_keys(key)
        keyinput.send_keys(Keys.ENTER)

    def closeUp(self):
        try:
            self.con.commit()
            self.con.close()
            self.driver.close()
        except Exception as err:
            print(err)

    def insertDB(self, mNo, mMark, mPrice, mNote, mFile):
        try:
            sql = "insert into phones (mNo,mMark,mPrice,mNote,mFile) values (?,?,?,?,?)"
            
            self.cursor.execute(sql, (mNo, mMark, mPrice, mNote, mFile))
        except Exception as err:
            print(err)

    def showDB(self):
        try:
            con = sqlite3.connect("phones.db")
            cursor = con.cursor()
            print("%-8s%-16s%-8s%-16s%s" % ("No", "Mark", "Price", "Image", "Note"))
            cursor.execute("select mNO,mMark,mPrice,mFile,mNote from phones order by mNo")
            rows = cursor.fetchall()
            for row in rows:
                print("%-8s%-16s%-8s%-16s%s" % (row[0], row[1], row[2], row[3], row[4]))
               
            con.close()
        except Exception as err:
            print(err)

    def downloadDB(self, src1, src2, mFile):
        data = None
        if src1:
            try:
                req = urllib.request.Request(src1, headers=JD.header)
                resp = urllib.request.urlopen(req, timeout=100)
                data = resp.read()
            except:
                pass
        if not data and src2:
            try:
                req = urllib.request.Request(src2, headers=JD.header)
                resp = urllib.request.urlopen(req, timeout=100)
                data = resp.read()
            except:
                pass
        if data:
            print("download begin!", mFile)
            fobj = open(JD.imagepath + "\\" + mFile, "wb")
            fobj.write(data)
            fobj.close()
            print("download finish!", mFile)

    def processJD(self):
        time.sleep(10)
        try:
            print(self.driver.current_url)
            lis = self.driver.find_elements_by_xpath("//div[@id='J_goodsList']//li[@class='gl-item']")
            time.sleep(1)
            for li in lis:
                time.sleep(1)
                try:
                    src1 = li.find_element_by_xpath(".//div[@class='p-img']//a//img").get_attribute("src")
                    time.sleep(1)
                except:
                    src1 = ""
                try:
                    src2 = li.find_element_by_xpath(".//div[@class='p-img']//a//img").get_attribute("data-lazy-img")
                    time.sleep(1)
                except:
                    src2 = ""
                try:
                    price = li.find_element_by_xpath(".//div[@class='p-price']//i").text
                    time.sleep(1)
                except:
                    price = "0"
             
                note = li.find_element_by_xpath(".//div[@class='p-name p-name-type-2']//em").text
                mark = note.split(" ")[0]
                mark = mark.replace("爱心东东\n", "")
                mark = mark.replace(",", "")
                note = note.replace("爱心东东\n", "")
                note = note.replace(",", "")
                time.sleep(1)
                self.No = self.No + 1
                no = str(self.No)
                while len(no) < 6:
                    no = "0" + no
                print(no, mark, price)
                if src1:
                    src1 = urllib.request.urljoin(self.driver.current_url, src1)
                    p = src1.rfind(".")
                    mFile = no + src1[p:]
                elif src2:
                    src2 = urllib.request.urljoin(self.driver.current_url, src2)
                    p = src2.rfind(".")
                    mFile = no + src2[p:]
                if src1 or src2:
                    T = threading.Thread(target=self.downloadDB, args=(src1, src2, mFile))
                    T.setDaemon(False)
                    T.start()
                    self.threads.append(T)
                else:
                    mFile = ""
                self.insertDB(no, mark, price, note, mFile)

        except Exception as err:
            print(err)




    def executeJD(self, url,key):
        starttime = datetime.datetime.now()
        print("starting!")
        self.startUp(url, key)
        print("processing!")
        self.processJD()
        print("closing!")
        self.closeUp()
        for t in self.threads:
            t.join()
        print("complete!")
        endtime = datetime.datetime.now()
        elapsed = (endtime - starttime).seconds
        print("Total", elapsed, "seconds elasped")


url = "https://www.jd.com"
spider = JD()
while True:
    print("1.爬取")
    print("2.显示")
    print("3.退出")
    s = input("请选择（1，2，3）；")
    if s == "1":
        JD().executeJD(url,'手机')
        continue
    elif s == "2":
        JD().showDB()
        continue
    elif s == "3":
        break

实验结果：

2）、心得体会

这次实验是书上原封不动的实验的复现。

作业2

1）、实验内容：

要求：

• 熟练掌握 Selenium 查找HTML元素、爬取Ajax网页数据、等待HTML元素等内容。
• 使用Selenium框架+ MySQL数据库存储技术路线爬取“沪深A股”、“上证A股”、“深证A股”3个板块的股票数据信息。

候选网站：东方财富网：http://quote.eastmoney.com/center/gridlist.html#hs_a_board

输出信息：MYSQL数据库存储和输出格式如下，表头应是英文命名例如：序号id，股票代码：bStockNo……，由同学们自行定义设计表头：

序号	股票代码	股票名称	最新报价	涨跌幅	涨跌额	成交量	成交额	振幅	最高	最低	今开	昨收
1	688093	N世华	28.47	62.22%	10.92	26.13万	7.6亿	22.34	32.0	28.08	30.2	17.55
2......

代码如下：

import pymysql
from selenium.webdriver.support import expected_conditions as EC
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.support.wait import WebDriverWait
import time
from selenium.webdriver.common.by import By
import datetime



class MySpider:

    def startup(self, url):
        # 初始化谷歌浏览器
        chrome_options = Options()
        chrome_options.add_argument('--headless')
        chrome_options.add_argument('--disable-gpu')
        self.driver = webdriver.Chrome(chrome_options=chrome_options)
        #初始化变量
        self.count=1
        try:
            self.con = pymysql.connect(host="127.0.0.1", port=3306, user="root", passwd="123456", db="mydb",
                                       charset="utf8")
            self.cursor = self.con.cursor(pymysql.cursors.DictCursor)
            try:
                # 有表先删表
                self.cursor.execute("drop table stock_1")
                self.cursor.execute("drop table stock_2")
                self.cursor.execute("drop table stock_3")
            except:
                pass

            try:
                # 建立新的表
                sql_1 = "create table stock_1 (number varchar(256) , code varchar(256), name varchar(256), the_latest_price varchar(256), price_limit varchar(256), change_amount varchar(256), trading_volume varchar(256), turnover varchar(256), swing varchar(256),tallest varchar(256),lowest varchar(256),today_open varchar(256),yesterday_get varchar(256))"
                sql_2 = "create table stock_2 (number varchar(256) , code varchar(256), name varchar(256), the_latest_price varchar(256), price_limit varchar(256), change_amount varchar(256), trading_volume varchar(256), turnover varchar(256), swing varchar(256),tallest varchar(256),lowest varchar(256),today_open varchar(256),yesterday_get varchar(256))"
                sql_3 = "create table stock_3 (number varchar(256) , code varchar(256), name varchar(256), the_latest_price varchar(256), price_limit varchar(256), change_amount varchar(256), trading_volume varchar(256), turnover varchar(256), swing varchar(256),tallest varchar(256),lowest varchar(256),today_open varchar(256),yesterday_get varchar(256))"
                self.cursor.execute(sql_1)
                self.cursor.execute(sql_2)
                self.cursor.execute(sql_3)
            except:
                pass
        except Exception as err:
            print(err)
        self.driver.get(url)

    def closeup(self):
        try:
            # 关闭数据库、断开与谷歌浏览器连接
            self.con.commit()
            self.con.close()
            self.driver.close()
        except Exception as err:
            print(err)
    #插入方法
    def insertdb(self,table,mnumber, mcode, mname, mthe_latest_price, mprice_limit, mchange_amount, mtrading_volume, mturnover, mswing, mtallest,mlowest, mtoday_open, myesterday_get):
        try:
            sql = "insert into " + table + "(number, code, name, the_latest_price, price_limit, change_amount, trading_volume, turnover, swing, tallest,lowest, today_open, yesterday_get) values (%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)"
            self.cursor.execute(sql, (mnumber, mcode, mname, mthe_latest_price, mprice_limit, mchange_amount, mtrading_volume, mturnover, mswing, mtallest,mlowest, mtoday_open, myesterday_get))
            print("成功插入")
        except Exception as err:
            print("插入失败")
            print(err)
    #爬虫的process
    def processspider(self):
        try:
            #判断当前有无元素Located
            WebDriverWait(self.driver, 1000).until(EC.presence_of_all_elements_located((By.XPATH, "//table[@id='table_wrapper-table']/tbody/tr")))
            #获取信息
            trs = self.driver.find_elements_by_xpath("//table[@id='table_wrapper-table']/tbody/tr")
            time.sleep(1)
            for tr in trs:
                time.sleep(1)
                number = tr.find_element_by_xpath("./td[position()=1]").text
                while len(number) < 6:
                    number = "0" + number
                code = tr.find_element_by_xpath("./td[position()=2]/a").text
                name = tr.find_element_by_xpath("./td[position()=3]/a").text
                the_latest_price = tr.find_element_by_xpath("./td[position()=5]/span").text
                price_limit = tr.find_element_by_xpath("./td[position()=6]/span").text
                change_amount = tr.find_element_by_xpath("./td[position()=7]/span").text
                trading_volume = tr.find_element_by_xpath("./td[position()=8]").text
                turnover = tr.find_element_by_xpath("./td[position()=9]").text
                swing = tr.find_element_by_xpath("./td[position()=10]").text
                tallest = tr.find_element_by_xpath("./td[position()=11]/span").text
                lowest = tr.find_element_by_xpath("./td[position()=12]/span").text
                today_open = tr.find_element_by_xpath("./td[position()=13]/span").text
                yesterday_get = tr.find_element_by_xpath("./td[position()=14]").text
                time.sleep(1)
                print(number, code, name, the_latest_price, price_limit, change_amount, trading_volume, turnover, swing, tallest,lowest, today_open, yesterday_get)
                # 判断板块并写入数据
                if self.count == 1:
                    self.insertdb("stock_1", number, code, name, the_latest_price, price_limit, change_amount, trading_volume, turnover, swing, tallest,lowest, today_open, yesterday_get)
                elif self.count == 2:
                    self.insertdb("stock_2", number, code, name, the_latest_price, price_limit, change_amount, trading_volume, turnover, swing, tallest,lowest, today_open, yesterday_get)
                elif self.count == 3:
                    self.insertdb("stock_3", number, code, name, the_latest_price, price_limit, change_amount, trading_volume, turnover, swing, tallest,lowest, today_open, yesterday_get)


        except Exception as err:
            print(err)

    def executespider(self, url):
        list = ["hs", "sh", "sz"]
        starttime = datetime.datetime.now()
        print("Spider starting......")
        self.startup(url)
        print("Spider processing......")
        print(1)
        print()
        #模拟点击翻页至下一板块
        while self.count < 4:
            print(self.count)
            tiihi = self.driver.find_element_by_xpath(
                "//div/ul[@class='tab-list clearfix']/li[@id='nav_" + list[self.count - 1] + "_a_board']/a")
            print(tiihi)
            print(list[self.count - 1])
            self.driver.execute_script('arguments[0].click()', tiihi)
            time.sleep(3)
            WebDriverWait(self.driver, 1000).until(
                EC.presence_of_element_located((By.XPATH, "//span[@class='paginate_page']/a[last()]")))
            self.processspider()
            self.count = self.count + 1
        print("Spider closing......")
        self.closeup()
        print("Spider completed......")
        endtime = datetime.datetime.now()  # 计算爬虫耗时
        elapsed = (endtime - starttime).seconds
        print("Total ", elapsed, " seconds elapsed")


url = "http://quote.eastmoney.com/center/gridlist.html#hs_a_board"
spider = MySpider()
while True:
    print("1.爬取")
    print("2.退出")
    s = input("请选择(1,2):")
    if s == "1":
        spider.executespider(url)
        continue
    elif s == "2":
        break

实验结果：

python工作台截图：

2）、心得体会

这题其实就是在作业一代码的框架下，改一改代码，第一次了解到selenium提供的脚本方法，使用起来很有意思，可以更自动化的爬取一些想要的内容，其他的都还好。

作业3

1）、实验内容：

要求：

• 熟练掌握 Selenium 查找HTML元素、实现用户模拟登录、爬取Ajax网页数据、等待HTML元素等内容。
• 使用Selenium框架+MySQL爬取中国mooc网课程资源信息（课程号、课程名称、学校名称、主讲教师、团队成员、参加人数、课程进度、课程简介）

候选网站：中国mooc网：https://www.icourse163.org

输出信息：MYSQL数据库存储和输出格式

Id	cCourse	cCollege	cTeacher	cTeam	cCount	cProcess	cBrief
1	Python数据分析与展示	北京理工大学	嵩天	嵩天	470	2020年11月17日 ~ 2020年12月29日	“我们正步入一个数据或许比软件更重要的新时代。——Tim O'Reilly” 运用数据是精准刻画事物、呈现发展规律的主要手段，分析数据展示规律，把思想变得更精细！ ——“弹指之间·享受创新”，通过8周学习，你将掌握利用Python语言表示、清洗、统计和展示数据的能力。
2......

代码如下：

import pymysql
from selenium.webdriver.support import expected_conditions as EC
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.support.wait import WebDriverWait
import time
from selenium.webdriver.common.by import By
import datetime
from selenium.webdriver.common.keys import Keys


class MySpider:

    def startup(self, url):
        # 初始化谷歌浏览器
        chrome_options = Options()
        chrome_options.add_argument('--headless')
        chrome_options.add_argument('--disable-gpu')
        self.driver = webdriver.Chrome(chrome_options=chrome_options)
        self.count=0
        try:
            self.con = pymysql.connect(host="127.0.0.1", port=3306, user="root", passwd="123456", db="mydb",
                                       charset="utf8")
            self.cursor = self.con.cursor(pymysql.cursors.DictCursor)
            try:
                # 如果有表就删除
                self.cursor.execute("drop table mooc")
            except:
                pass

            try:
                # 建立新的表
                sql_1 = "create table mooc (Id varchar(2048) , cCourse varchar(2048), cCollege varchar(2048), cTeacher varchar(2048), cTeam varchar(2048), cProcess varchar(2048), cBrief text)"
                self.cursor.execute(sql_1)
            except:
                pass
        except Exception as err:
            print(err)
        self.driver.get(url)
        key="时尚"
        input = self.driver.find_element_by_xpath("//div[@class='web-nav-right-part']//div[@class='u-baseinputui']//input")
        input.send_keys(key)  # 输入关键字
        input.send_keys(Keys.ENTER)

    def closeup(self):
        try:
            # 关闭数据库、断开与谷歌浏览器连接
            self.con.commit()
            self.con.close()
            self.driver.close()
        except Exception as err:
            print(err)

    def insertdb(self,id, course, college, Teacher, Team, Process, Brief):
        try:
            sql = "insert into mooc (Id, cCourse, cCollege, cTeacher, cTeam, cProcess, cBrief) values (%s,%s,%s,%s,%s,%s,%s)"
            self.cursor.execute(sql, (id, course, college, Teacher, Team,Process, Brief))
            print("成功插入")
        except Exception as err:
            print("插入失败")
            print(err)

    def processspider(self):
        try:
            search_handle = self.driver.current_window_handle
            i=5
            #判断当前有无元素Located
            WebDriverWait(self.driver, 1000).until(EC.presence_of_all_elements_located((By.XPATH, "//div[@class='m-course-list']/div/div[@class]")))
            spans = self.driver.find_elements_by_xpath("//div[@class='m-course-list']/div/div[@class]")
            while i>=5:
                for span in spans:
                    self.count=self.count+1
                    course = span.find_element_by_xpath(".//div[@class='t1 f-f0 f-cb first-row']/a/span").text
                    college = span.find_element_by_xpath(".//div[@class='t2 f-fc3 f-nowrp f-f0']/a[@class='t21 f-fc9']").text
                    teacher = span.find_element_by_xpath(".//div[@class='t2 f-fc3 f-nowrp f-f0']/a[@class='f-fc9']").text
                    team = span.find_element_by_xpath(".//div[@class='t2 f-fc3 f-nowrp f-f0 margin-top0']/span[@class='hot']").text
                    process = span.find_element_by_xpath(".//span[@class='txt']").text
                    brief = span.find_element_by_xpath(".//span[@class='p5 brief f-ib f-f0 f-cb']").text
                    print(self.count,course,college,teacher,team,process,brief)  # 爬取之后输出到控制台
                    self.insertdb(self.count,course,college,teacher,team,process,brief)
                i=i-1
        except Exception as err:
            print(err)

    def executespider(self,url,key):
        starttime = datetime.datetime.now()
        print("Spider starting......")
        self.startup(url)
        print("Spider processing......")
        print(1)
        print()
        self.processspider()
        print("Spider closing......")
        self.closeup()
        print("Spider completed......")
        endtime = datetime.datetime.now()  # 计算爬虫耗时
        elapsed = (endtime - starttime).seconds
        print("Total ", elapsed, " seconds elapsed")


url = "https://www.icourse163.org/"
spider = MySpider()
while True:
    print("1.爬取")
    print("2.退出")
    s = input("请选择(1,2):")
    if s == "1":
        spider.executespider(url,key="时尚")
        continue
    elif s == "2":
        break

实验结果：

2）、心得体会

这个作业的代码在第一题和第二题的基础上做了改动，就很顺利的得到结果了。