# -*- coding: utf-8 -*-
"""
根据京东url地址，获取商品价格
京东请求处理过程，先显示html页面，然后通过ajax get请求获取相应的商品价格
 
1.商品的具体数据在html中的格式，如下(示例)
# product: {
# skuid: 1310118868,
# name: 'u9999u5f71u77edu88d9u4e24u4ef6u5957u88c5u5973u0032u0030u0031u0034u51acu88c5u65b0u6b3eu97e9u7248u957fu86u00u60u4e0au8863u8377u53f6u8fb9u534au8eabu88d9u6f6eu0020u85cfu9752u0020u004d',
# skuidkey:'7781F505B71CE37A3AFBADA119D3587F',
# href: 'http://item.jd.com/1310118868.html',
# src: 'jfs/t385/197/414081450/336886/3070537b/1be0N2995990c.jpg',
# cat: [1315,1343,1355],
# brand: 18247,
# nBrand: 18247,
# tips: false,
# type: 2,
# venderId:38824,
# shopId:'36786',
# TJ:'0',
# specialAttrs:["is7ToReturn-1"],
# videoPath:'',
# HM:'0'
# }
 
2.ajax请求代码如下：
# // 获得数字价格
# var getPriceNum = function(skus, $wrap, perfix, callback) {
# skus = typeof skus === 'string' ? [skus]: skus;
# $wrap = $wrap || $('body');
# perfix = perfix || 'J-p-';
# $.ajax({
# url: 'http://p.3.cn/prices/mgets?skuIds=J_' + skus.join(',J_') + '&type=1',
# dataType: 'jsonp',
# success: function (r) {
# if (!r && !r.length) {
# return false;
# }
# for (var i = 0; i < r.length; i++) {
# var sku = r[i].id.replace('J_', '');
# var price = parseFloat(r[i].p, 10);
#
# if (price > 0) {
# $wrap.find('.'+ perfix + sku).html('￥' + r[i].p + '');
# } else {
# $wrap.find('.'+ perfix + sku).html('暂无报价');
# }
#
# if ( typeof callback === 'function' ) {
# callback(sku, price, r);
# }
# }
# }
# });
# };
"""
import urllib
import json
import re
 
 
class JdPrice(object):
 """
 对获取京东商品价格进行简单封装
 """
 def __init__(self, url):
 self.url = url
 self._response = urllib.urlopen(self.url)
 self.html = self._response.read()
 
 def get_product(self):
 """
 获取html中，商品的描述(未对数据进行详细处理，粗略的返回str类型)
 :return:
 """
 product_re = re.compile(r'compatible: true,(.*?)};', re.S)
 product_info = re.findall(product_re, self.html)[0]
 return product_info
 
 def get_product_skuid(self):
 """
 通过获取的商品信息，获取商品的skuid
 :return:
 """
 product_info = self.get_product()
 skuid_re = re.compile(r'skuid: (.*?),')
 skuid = re.findall(skuid_re, product_info)[0]
 return skuid
 
 def get_product_name(self):
 pass
 
 def get_product_price(self):
 """
 根据商品的skuid信息，请求获得商品price
 :return:
 """
 price = None
 skuid = self.get_product_skuid()
 url = 'http://p.3.cn/prices/mgets?skuIds=J_' + skuid + '&type=1'
 price_json = json.load(urllib.urlopen(url))[0]
 if price_json['p']:
 price = price_json['p']
 return price
 
 
# 测试代码
if __name__ == '__main__':
 url = 'http://item.jd.com/1310118868.html'
 url = 'http://item.jd.com/1044773.html'
 jp = JdPrice(url)
 print jp.get_product_price()
 
 
# htm.decode('gb2312', 'ignore').encode('utf-8')
# f = open('jjs.html', 'w')
# f.write(htm)
# f.close()

再给大家分享一个京东价格的爬虫：

fromcreepyimportCrawler
fromBeautifulSoupimportBeautifulSoup
importurllib2
importjson

classMyCrawler(Crawler):
defprocess_document(self,doc):
ifdoc.status==200:
print[%d]%s%(doc.status,doc.url)
try:
soup=BeautifulSoup(doc.text.decode(gb18030).encode(utf-8))
exceptExceptionase:
printe
soup=BeautifulSoup(doc.text)
printsoup.find(id="product-intro").div.h1.text
url_id=urllib2.unquote(doc.url).decode(utf8).split(/)[-1].split(.)[0]
f=urllib2.urlopen(http://p.3.cn/prices/get?skuid=J_+url_id,timeout=5)
price=json.loads(f.read())
f.close()
printprice[0][p]
else:
pass

crawler=MyCrawler()
crawler.set_follow_mode(Crawler.F_SAME_HOST)
crawler.set_concurrency_level(16)
crawler.add_url_filter(.(jpg|jpeg|gif|png|js|css|swf)$)
crawler.crawl(http://item.jd.com/982040.html)