通过Python爬虫,扒一扒51job网站上的公司以及职位信息


#操作系统:win7 64位
#Python版本:3.5.2
#Python 3.5.2 (v3.5.2:4def2a2901a5, Jun 25 2016, 22:18:55) [MSC v.1900 64 bit (AM
#D64)] on win32
#效果图:

#功能:爬取列表页面,和相对应职位的详细页面

# coding=utf-8
import xlwt
import requests
from lxml import etree
import time

all_info_list = []


def get_info(url):
    job_infos = []
    job_msg_1 = ''
    work_address = ''
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36'
    }

    html = requests.get(url,headers=headers)
    selector = etree.HTML(html.text)
    error = selector.xpath('/html/body/div[2]/div[2]/div[1]/div/text()')
    if len(error):
        pass
    else:

        computer_name = selector.xpath('/html/body/div[2]/div[2]/div[2]/div/h1/text()')
        if len(computer_name):
            computer_name = computer_name[0].encode('latin1').decode('gb2312')
        else:
            computer_name = "null"

        computer_type = selector.xpath('/html/body/div[2]/div[2]/div[2]/div/p[1]/text()')
        if len(computer_type):
            computer_type = computer_type[0].encode('latin1').decode('GBK')
            computer_type=computer_type.replace(' ', '')
            computer_type = computer_type.replace('\t', '')
        else:
            computer_type = "null"

        address = selector.xpath('/html/body/div[2]/div[2]/div[3]/div[2]/div/p/text()')
        if len(address):
            try:
                address = address[1].encode('latin1').decode('gb2312')
                address = address.replace(' ', '')
                address = address.replace('\t', '')
            except UnicodeDecodeError:
                pass
        else:
            address = "null"


        infos = selector.xpath('//*[@id = "joblistdata"]/div[*]')
        if len(infos) != 0:
            for info in infos:
                jobs = info.xpath('p/a/text()')
                if len(jobs) != 0:
                    jobs = jobs[0].encode('latin1').decode('gb2312')
                else:
                    pass

                jobs_num = info.xpath('span[1]/text()')
                if len(jobs_num) > 0:
                    jobs_num = jobs_num[0].encode('latin1').decode('gb2312')
                else:
                    pass
                jobs_address = info.xpath('span[2]/text()')
                if len(jobs_address) > 0:
                    jobs_address = jobs_address[0].encode('latin1').decode('gb2312')
                else:
                    pass
                jobs_salary = info.xpath('span[3]/text()')
                if len(jobs_salary) > 0:
                    jobs_salary = jobs_salary[0].encode('latin1').decode('gb2312')
                else:
                    pass
                jobs_href = info.xpath('p/a/@href')
                if len(jobs_href):
                    jobs_href = jobs_href[0].encode('latin1').decode('gb2312')
                    html_1 = requests.get(jobs_href)
                    selector_1 = etree.HTML(html_1.text)
                    job_msg = selector_1.xpath('/html/body/div[3]/div[2]/div[3]/div[2]/div/p/text()')
                    if len(job_msg) !=0:
                        job_msg_1 = ''
                        for job_msg_num in range(len(job_msg)):
                            try:
                                job_msg_2 = job_msg[job_msg_num].encode('latin1').decode('gb2312')
                                job_msg_1 +=  job_msg_2
                            except UnicodeDecodeError:
                                 pass
                    else:
                        job_msg_br = selector_1.xpath('//*[@class="bmsg job_msg inbox"]//text()')
                        job_msg_1 = ''
                        for job_msg_num in range(len(job_msg_br)):
                            try:
                                job_msg_2 = job_msg_br[job_msg_num].encode('latin1').decode('gb2312')
                                job_msg_1 += job_msg_2
                            except UnicodeDecodeError:
                                pass


                    work_address= selector_1.xpath('/html/body/div[3]/div[2]/div[3]/div[3]/div/p/text()')
                    if len(work_address):
                        work_address = work_address[1].encode('latin1').decode('gb2312')
                    else:
                        work_address = "null"
                else:
                    jobs_href = "null"

                data = {
                    'jobs':jobs,
                    'jobs_num':jobs_num,
                    'jobs_address':jobs_address,
                    'jobs_salary':jobs_salary,
                    'job_msg_1':job_msg_1,
                    'work_address':work_address,
                    }
                job_infos.append(data)
            for job_info in range(len(job_infos) - 1):
                info_list = [computer_name, computer_type, address, job_infos[job_info]['jobs'],
                             job_infos[job_info]['jobs_num'], job_infos[job_info]['jobs_address'],
                             job_infos[job_info]['jobs_salary'], job_infos[job_info]['job_msg_1'],
                             job_infos[job_info]['work_address']]
                all_info_list.append(info_list)
                print (all_info_list)
        else:
                pass
    time.sleep(1)

if __name__ == '__main__':
    urls = ['http://jobs.51job.com/all/co{}.html'.format(number) for number in range(101, 501)]
    for url in urls:
        get_info(url)
    header = ['computer_name','computer_type','address','jobs','jobs_num','jobs_address','jobs_salary','job_msg_1','work_address']
    book = xlwt.Workbook(encoding='utf-8')
    sheet = book.add_sheet('Sheet1')
    for h in range(len(header)):
        sheet.write(0, h, header[h])
    i = 1
    for list in all_info_list:
        j = 0
        for data in list:
            sheet.write(i, j, data)
            j += 1
        i += 1
    book.save('51job_test_101-500.xls')



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