經常都會在論壇上看到架構,分層這些問題的討論,然而具體的實現很少人給過詳細例子,本例是一個基于接口的工廠模式的標準多層架構應用示例,以促進求知者們的進步.-Will always be at the forum to see the structure of layered discussion of these issues, but few people realize specific to the detailed examples, this example is an interfa