依据中国地震前兆台网整体构架和软件规划设计，数据统一访问平台负责完成其它子系统或软件访问数据库的统一视图管理、统一事务管理、统一链接管理，同时实现数据访问的分布式应用,是地震前兆台网管理系统的基础服务子系统，对整个管理系统的性能和数据安全起至关重要的作用。EJB3.0框架技术是实现整个数据统一访问平台的核心技术。本文从需求分析、功能实现、性能实现、技术架构、运行环境和服务接口等5个方面介绍EJB3.0在数据统一访问平台中的实际应用情况。

According to the Chinese earthquake precursor network overall architecture and software design, data access platform is responsible for completing other subsystems or software to access the database of unified view management, unified management and unified link pool management, while enabling data access of distributed applications, is the precursor network management system of the underlying service subsystem, for the entire management system performance and data security plays a crucial role. EJB3.0 framework technology is the entire Dataplatform's core technologies. This article from requirements analysis, functional implementation, performance implementation, technical architecture, operating environment and the services interface, and so on five aspects of the introduction of DataPlatform.