python抓取京东商城手机列表url实例代码

#-*- coding: utf-8 -*-
'''
created on 2013-12-5

@author: good-temper
'''

import urllib2
import bs4
import time

def getpage(urlstr):
    '''
                获取页面内容
    '''
    content = urllib2.urlopen(urlstr).read()
    return content

def getnextpageurl(currpagenum):
    #http://list.jd.com/9987-653-655-0-0-0-0-0-0-0-1-1-页码-1-1-72-4137-33.html
    url =  u'http://list.jd.com/9987-653-655-0-0-0-0-0-0-0-1-1-'+str(currpagenum+1)+'-1-1-72-4137-33.html'

    #是否有下一页
    content = getpage(url);
    soup = bs4.beautifulsoup(content)
    list = soup.findall('span',{'class':'next-disabled'});
    if(len(list) == 0):
        return url
    return ''

def analyzelist():
    pagenum = 0
    list = []
    url = getnextpageurl(pagenum)
    while url !='':
        soup = bs4.beautifulsoup(getpage(url))
        pagelist = soup.findall('div',{'class':'p-name'})
        for elem in pagelist:
            soup1 =  bs4.beautifulsoup(str(elem))
            list.append(soup1.find('a')['href'])

        pagenum = pagenum+1
        print pagenum
        url = getnextpageurl(pagenum)
    return list

def analyzecontent(url):

    return ''

def writetofile(list, path):
    f = open(path, 'a')
    for elem in list:
        f.write(elem+'\n')
    f.close()

if __name__ == '__main__':
    list = analyzelist()
    print '共抓取'+str(len(list))+'条\n'

    writetofile(list, u'e:\\jd_phone_list.dat');