separation code的意思|示意

In addition, mapping files make for a cleaner separation between business logic and persistence code.

另外，映射文件能够很清晰的将业务逻辑和持久化代码分开。

You can achieve some code separation if you represent the concrete Customer Persistence class as an interface instead.

如果换用接口来表示Customer persistence类，可以实现一些代码分离。

Having a secondary Ajax controller (such as a servlet or Web service) forces a stronger separation of your model code.

使用二级ajax控制器(如servlet或Web服务)可以进行更强大的模型代码分离。