Description: A typical J2EE three-tier structure, divided into the presentation layer, middle layer (business logic) and data services layer. Three-tier system, the business rules, data access and verify the legitimacy of such work on the intermediate layer processing. Clients do not directly interact with the database, but by the middle tier components and establish a connection, then the middle layer and database interaction.
- [HR] - ExtJS+ J2EE-based human resources manage
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