Design and implementation of the business layer of the Tourism Business Information Collection and Distribution System based on the proxy and the factory patterns

With the combination of information technology and the theory of design pattern, this article focuses on the analysis and comparison of the principles and methods in the business layer design of an information system. The principles of three design patterns, namely business delegate, factory pattern and dependency injection were introduced with in-depth and a new solution to business layer design of an information system by the joint use of the above mentioned patterns was put forward and elaborated. The characteristics of such technical solution were analyzed and the methods of implementation were explained. With the combination of the requirements of the application of the business layer of the tourism collection and distribution center, the advantages and disadvantages of the technical solution and the methods for further optimization of application were summarized.