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Java has become increasingly popular as a server-side programming language for database-powered Web applications. Those applications’ business logic-handling methods must work with data from backend ...

Object-oriented systems are usually partitioned into layers of related responsibilities and only dependencies in one direction are allowed, from higher layers (more specific, less reusable) to lower ...

The Data Access Object (DAO) pattern provides an abstraction layer between the business logic tier (business object) and the persistent storage tier (data source). Business objects access data sources ...