摘 要
随着经济的发展和通信技术的提高，物流作为一种先进的组织方式和管理技术，被广泛认为是企业在降低消耗和提高劳动生产率以外的重要的利润源泉，在国民经济和社会发展中发挥着重要作用。本文在物流企业的正常运营中，基于GIS的信息系统已经成为不可或缺的管理工具。在对WebGIS技术和物流企业需求进行分析的基础上，结合不同企业的业务流程的具体特点，设计了一套扩展性较强的基于WebGIS的物流信息系统。
系统的主要功能是将企业管理人员与运输车辆之间通过服务器连接起来，实现物流系统的监控和管理。系统采用B/S架构，服务器端通过网络与车辆终端通信，向车辆发送控制信息并获取车辆的当前状态。同时它还和Web客户端进行交互，向客户端提供地图服务，并执行Web客户端的请求。Web客户端采用Ajax技术与服务器端进行通信，通过动态地图监控车辆。它还实现了发送货物、编辑线路、发送消息等功能。考虑到可扩展性，系统重点实现了服务器端进行消息中转的消息队列，建立了Web客户端到车辆终端之间的消息通路，并可以随时更新消息队列中消息处理方式。本系统实现了物流系统的主要功能，极大提高了企业的管理水平。
本文首先进行了系统的需求获取和业务分析。然后，采用分层的方法对系统进行设计，叙述了消息队列框架的详细设计与实现，并叙述了服务器端和客户端功能模块的设计和实现。并通过对系统的测试，对其功能和性能进行评估。最后，进行了总结，介绍了系统的特点和不足之处，指出了下一步的工作方向。
关键词：物流；WebGIS；消息队列
Design and Implementation of WebGIS-Based Logistics Information System
Abstract
With development of economy and improvement of communication technology, as an advanced mode of organization and management skill, logistics is widely considered to be the major source of profits in the enterprise besides reducing consumption and raising labor productivity. It plays an important role in the national economy and social development. The GIS-based information system has become an indispensable management tool in the regular business of logistics enterprise. Based on the analysis of the WebGIS technology and requirements of logistics enterprise, a WebGIS-based logistics information system with high expansibility is designed, according to specific business processes of various logistics enterprises.
The major function of the system is to make manager communicated with vehicles via the server, and to realize monitoring and management of logistics system. The B/S architecture is adopted in the system. The server communicates with vehicles through network, sending them control data and receiving status data from them. At the same time, server interacts with Web clients, providing web map service and executing client requests. Web client communicates with server with Ajax technology, monitoring vehicles by watching dynamic maps. It also implements functions such as sending cargo, editing route, sending message, etc. Aiming at high expansibility of the system, message queue kept in server is seriously implemented. It means that a message channel between the Web client and vehicles is established, and the handling methods of the messages in message queue can be updated at any time. The system meets primary requirements and enhances management quality of customer.
Firstly, in this thesis the requirement elicitation and the business analysis are completed. Then system is designed into multi-layer architecture. The particular design and implementation of message queue framework are described. Design and implementation of the functional modules of server and client are presented. Function and capability of the system are eva luated through test. At last, system traits and deficiencies are summarized, and next tasks are pointed out.
Keywords：Logistics; WebGIS; Message Queue
