随着网络技术的发展,应用的体系结构从二层体系结构发展到三层体系结构,而且应用间通过网络交换数据日益频繁。该文提出了利用XML技术实现三层应用体系结构的中间层的网上数据交换模型,详细分析了实现过程中的关键问题。然后给出了使用它改造劳动力信息系统的实例。最后对采用该模型的优缺点作了进一步分析。它实现简单,可扩展性好,并且易于集成各种遗留系统。 With the development of network technology, the applied architecture has evolved from a two-tier architecture to a three-tier architecture, and applications have exchanged data frequently over the network. This paper proposes an XML-based data exchange model of the middle tier of the three-tier application architecture, and analyzes in detail the key issues in the implementation. Then it gives an example of using it to transform labor information system. Finally, the advantages and disadvantages of using this model are further analyzed. It is simple to implement, scalable, and easy to integrate with legacy systems.