Alibaba Java Developer's Handbook DO, DTO, BO, AO, VO, POJO
Hierarchical model statute areas:
- DO (Data Object): one correspondence with the database table structure, by DAO layer uplinked data source object.
- DTO (Data Transfer Object): data transfer object, Service Manager or outward transfer object.
- BO (Business Object): business objects. Encapsulate business logic layer output by the Service object.
- AO (Application Object): application object. In the abstract object model multiplexing layer between the Web and Service layer, very close to the presentation layer, reusability is not high.
- VO (View Object): Object display layer, typically a Web rendering engine to the transmission layer template object.
- POJO (Plain Ordinary Java Object): In this manual, POJO refers specifically only setter / getter / toString simple categories, including DO / DTO / BO / VO and so on.
- Query: query object data, the upper layers receiving a query request. Note that more than two parameter query package, prohibit the use of the Map class transmitted.
Domain model naming convention:
- Data Objects: xxxDO, xxx is the table name.
- Data Transfer Object: xxxDTO, xxx is the name of the relevant business areas.
- The display object: xxxVO, xxx generally page name.
- POJO is DO / DTO / BO / VO, collectively, prohibit named as xxxPOJO.
