One major performance bottleneck of the multi-layer application software is low data access efficiency; connection pool technology is an effective way to solve this problem.
数据访问效率低下已成为多层体系结构应用软件的主要性能瓶颈，而数据库连接池技术是解决这一问题的主要途径。
In the research, a constructing method of multi-layer software architecture based on distributed component technology is presented.
通过研究比较，给出了一种基于分布式组件技术的多层软件体系架构的平台搭建方案。
Then it expounds the J2EE standard used in developing enterprise level application system based on multi-layer software architecture and related technology contained in it.
然后介绍了基于多层软件体系结构的企业级应用系统开发规范J2EE，对该规范的相关技术进行了说明。
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