Application Of Framework Of Data Persistence Layer In Petrol ERP

With the develop of several years, J2EE as the resvole used in Enterprise's application system based on Java, has become multi-tie frame based on EJB and MVC,since the original of the frame of jsp+servlet+db .With the develop of several years,J2EE has developed greatly,and J2EE has became the first select of software develop and deploy platform. And the frame of jsp+servlet+db can't satisfied the request of the Enterprise's application.At first,the paper analyzes the advantage and disadvantage of the frame of jsp +servlet +db,and dissertates the multi-tie frame, module and reused technology , data access object technology. Object-Relation Mapping technology - is analyzed;the paper also mentions the frame used in petrol ERP based on the request of petrol ERP and the software thinking of multi-tie and loose coupling,and expound the application of O-R Mapping in this frame .At lasr,according to the system test of ability and real running, the paper prove the flexibility.