本文中我们将要展现一个基于B/S结构的J2EE为基础的在线程序判定(Online Judge)应用。这个应用使用JSP来接受用户输入，使用Servlet来处理用户的请求，并使用JDBC与数据库进行通信来管理数据，中间件使用了Apache的Tomcat服务器。在后端关键的编译系统中，我们采用了Visual C++进行构建，并使用JNI技术来粘合Java技术与C/C++语言间的鸿沟。但是前端的J2EE系统与后台的自动化编译系统间并没有直接的耦合，它们的关系是并行的。后端系统同样使用JDBC对与数据库进行通信，操作数据并处理自己的任务。本文中所描述的应用系统已在Windows 2003 Service Pack 2上通过了测试。
关键词 程序设计竞赛，ACM/ICPC，J2EE，Java
ABSTRACT
In this paper, we will represent an Online Judge System basically used J2EE technology which based on B/S architecture. This application use JSP for user input, use servlet for user request parsing, manufacture data through JDBC technology on the database, use Apache Tomcat as the middle-ware server. We use the Visual C++ to build the back-end compiling-judge system,and use JNI technology to join the divide between Java and C plus plus. But the front-end web system and the back-end auto-compiling system are not coupled, they are parallel running. The back-end system also use JDBC to communicate with the database, manufacturing the datas and going on its tasks. The application schemed in the paper is passed testing on Windows Server 2003 Service Pack 2.
