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With computer technology gradually civilians , the computer is now deep into every corner of social production and life , to the most cutting-edge technology and research to life Laundry cooking , all show the charm of computer technology . The advent of the computer not only improve work efficiency, saving the cost of doing business , but also greatly reduces the labor intensity . Large amount of data , the process is complex but has a certain cycle of things , are now handled by the computer . And should be regarded as the most typical types of sales system . The traditional front sales system management manual bookkeeping management is not only inefficient , error-prone , complex procedures , and have a lot of manpower as a basis . In order to make the book sales book sales throughout the electronic, and meet the managers of the title, publisher , author , type of comprehensive, efficient management , special design of this system . The development of book sales system sales of books or books storage, a library , inventory and other operations becomes convenient, efficient and a separate user interface because the system provided for every possible situation , and the operation is very simple. Books how much can achieve the classification of electronic management . You can also use fuzzy query, Book warehouse keeper can quickly find related books . This paper first introduces the requirements and basic concepts of library management system , summed up the past, the development of book sales system development process . Then on the design ideas and design patterns , the issue of e-commerce in different domains secure access obstacles restricting the development of electronic commerce , this paper analyzes such as firewall, intrusion detection , cross-domain authorization and honeypot e-commerce security technology and a body to the cross-domain authorization , the proposed cross - domain authorization management model based on ontology , to prevent unauthorized cross-domain Web access brings risks . Finally, a detailed description of the Client / Server structure and design process and key method .
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