系统采用三层结构，在客户端用户通过浏览器完成数据下载与模拟操作，浏览器端的表现逻辑通过JSP网页完成。而系统内部复杂的业务逻辑主要通过JavaBean的组件（Component）实现，JavaBean组件在WWW服务器上运行，通过JSP返回到客户浏览器。通过表现逻辑与业务逻辑的分离，使网页内容简洁，系统的可维护性和可扩充性增强。在服务器端，系统使用JDBC中间件访问数据库，数据库服务器定义了本系统所需要的事务逻辑和数据逻辑。本系统使用JSP技术作为表现手段，服务器采用Tomcat 5.0.3作为JSP引擎，系统业务逻辑由JavaBean 组件完成，使用JDBC 3.0 驱动程序访问数据库。由于系统测试需要成熟的数据库支持，因此系统采用SQL Server 2000数据库作为数据库服务器。-The system uses a three-tier structure, to complete the download data and simulation operations in the client user through a browser, the browser-side presentation logic JSP page to complete. Complex business logic within the system through a JavaBean component (Component), JavaBeans components running on a WWW server, through the JSP returned to the client browser. The performance of the separation of logic and business logic, so that web content is simple, enhanced maintainability and scalability of the system. JDBC middleware on the server side, the system uses to access the database, the database server defines the business logic and data logic system. This system uses JSP technology as a means of expression, the server with the Tomcat 5.0.3 as JSP engine, the system business logic from the JavaBean component to complete access to the database using JDBC 3.0 driver. System testing requires sophisticated database support, the system uses SQL Server 2000 database as the database serv