Implement of E-government System with Data Persistence of JavaEE

Data persistent is an important part of development in JavaEE, and it is an intractable problem in process of designing E-government system. However, we usually use a single framework to build enterprise-class applications, such as mixed logic of reuse program and poor expansibility. The realizing scheme of how to use abstract factory pattern, DAO pattern, VO pattern, singleton pattern and Hibernate framework to design a data persistence framework, with the development of a certain communication enterprise´s fixed assets management system, and part of the implementation codes was given. This framework can make the system agile and alterable. What´s more, this framework effectively improves the code reusability and extensibility.