摘要：随着网络的发展，电子商务以爆炸式的发展趋势进入人们的生活。虽然电子商务的繁荣发展为消费者带来了很多便利，但一些商家的信誉也让消费者感到担忧，如价格欺诈行为，这时消费者就需要了解商品真实历史价格。为解决以上问题，本毕业设计实现了一个商品价格跟踪管理系统，对特定商品的历史信息进行跟踪记录。利用该系统用户可以指定自己想要观察的商品，系统搜索这家电商获取商品信息，并反馈给用户选择。商品监控模块定时对用户指定商品进行信息采集。系统将商品的跟踪数据以图形的格式展现给用户，供用户随时查看。同时，系统还具有价格预警机制，当商品价格进入预设的价格范围时，系统会自动通知用户。测试表明了该系统运行正常，能够完成预设的功能。43272

毕业论文关键词：网络爬虫；网页内容分析；商品价格跟踪；数据分析

The Design and Implementation of Commodity Price Tracking and Management System

Abstract: With the development of Internet, E-Commerce comes into people's lives with an explosive trend. Although the prospering development of E-Commerce has brought a lot of conveniences to consumers, some businessmen's credibility makes consumers concern, such as price fraud, etc. Thus, consumers are eager to know the real historical price of commodity. In order to solve this problem, this graduation project implements a Commodity Price Tracking and Management System, which can regularly track the historical price of the commodities of B2C. Users can appoint commodity of some e-commerce which they want to observe. The system will return the result of search to the user for choosing. Commodity monitor will reptile the commodities which users appoint due to schedule. The appliance will display the result of tracking data in a graphical format to users when users want to check the commodity. At the same time, the system has a price early warning mechanism. Which will automatically notify the user if the price of commodities is over the range that user set. The software testing proves that the system can work normally and completes the preset function.

Keywords: crawler; web content analysis; commodity price tracking; data analysis.

目 录

1 绪论 1

1.1 课题的研究背景 1

1.2 国内外研究现状与水平 1

1.3 论文结构 2

2 技术背景 3

2.1 网络爬虫的定义 3

2.2 电子商务搜索引擎 3

2.3 广度优先搜索策略 3

2.4 图形显示 3

2.5 服务器监听 3

2.6 定时任务 4

2.7 邮件自动发送 4

3 系统分析 5

3.1 需求分析 5

3.1.1 编写目的 5

3.1.2