【摘要】 研究和分析了常用各种数据库中间件的工作原理以及各自的优缺点 ,在此基础上 ,提出并讨论了三层客户机 /服务器环境下的一个具体应用实例 .对其所采用的关键技术和设计思想进行了详细的分析更多还原

【Abstract】 In this paper,the common DB middleware are studyed and analyzed first. Then we present a new DB middleware in a three tier C/S model. The new DB middleware provides an efficient and powerful mechanism to manage database connection and data access to meet the needs of application requirements. It will improve the network performance for multi user accessing database and optimize network transmission. It also can provide the interface with the various RDBMSs (relational database management systems). The design considerations, the implementation and the critical techniques used are given and explained in detail in this paper.更多还原