Designing And Realization Of The Three-level Network About Agricultural Products' E-Commerce

E-Commerce refers to the economic activities promoted by advanced information technology and communication methods, which using the network as a platform. Its outstanding symbol is to change business methods, increase trade opportunity, decrease trade cost, simplify procedure and improve trade efficiency. Developing E-Commerce is a necessary way to implement information-driven industrialization, change the economical developing methods and improve the quality and efficiency of national economy. In China, the application of computer has a history of more than forty years, however E-Commerce has been used only for more than ten years. As an innovative economical methods, it is not only affecting the business field, but also changing the traditional economical methods and structure. Its great impact on the human being's economical activities is revealing gradually.With the Internet developing rapidly, the cost of the E-Commerce is decreasing gradually, which changed the former situation that only powerful companies are involved in E-Commerce, however, nowadays the foodstuff divisions also take their part. The great effect and business opportunity which E-Commerce bring to the foodstuff enterprise are also revealing gradually. With the change of traditional production, sales and service methods, decrease of the trade cost to large extent, cutting down the circulation procedure and enhancing trade opportunities, E- Commerce can promote to upgrade the structure of the individual enterprise and also the whole national economy, which will finally improve the efficiency and benefit and even the overall development of national economy.The thesis takes its framework on a particular three-level administration structure as province, city and country administrations, which includes different agriculture wholesale markets and relevant enterprises to build a huge Internet system. Running by E-Commerce, the whole system serves as a provincial economic platform for agricultural products exchange, which improves trade efficiency, broadens the market and facilitates the macroscopically adjustment by the government to the exchange of agricultural products.Firstly, the thesis gives a detailed analysis on the system demands and put forwards the current existing problem for the exchange of agricultural products. The design of the network adopted both WAN and LAN and used VOIP technology and VLAN division to stand out the economy and security of the whole system. With J2EE as the technology platform, the software employed multiplayer model, which a flexible, active, and easy to maintain business system was built. The thesis not only designs the three-level network structure for that provincial agricultural products exchanging platform, give detailed planning from the WAN and LAN perspectively, but also provides specific analysis to every levels and offered the selection of the relevant hardware. Al the above renders constructive suggestions for references.In conclusion, this thesis provides a detailed plan to build a provincially three-level network from the hardware selection to the software design. Its feasibility, maneuverability, economy and security are under proving, which has a promising marketing future.