컴퓨터 프로그래밍 컴퓨터 프로그래밍

The persistence layerDAO business objectthe object-oriented representation of the problem domainshould never depend on any other layerfiner-grained business logicdata transfer objects(DTOs)domain classesthe classes are identified by deriving them from the nouns in the system The business logic layerservice classes coarse-grained business functionsto demarcate transactions The presentation layerr..

standardized building blocks from which you can form a program To assist programmers in working together in groups, it is necessary to break programs apart into separate pieces, which communicate with each other through well-defined interfaces. This way, each piece can be developed and tested independently of the others, making it easier for multiple programmers to work on the project.each of yo..