Object-Oriented Data Persistence Layer Solution: Java Data Objects
面向对象的数据持久层解决方案--Java数据对象

The design of data persistence layer is always important and difficult under J2EE development environment. On the basis of analysis on several solutions, this paper introduces JDO and discusses its characteristics and architecture. Then it makes an example on how to develop JDO. In contrast with other techniques, JDO can greatly improve the efficiency of the design of data persistence layer.