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Recently in the write interface to Android, where server data needs to define VO (Value object) object for encapsulation transportFor Vo, PO, BO, Qo,dao,pojo concept is still relatively vague, so here to record:The O/R Mapping is an abbreviation for the Object Relational Mapping. The popular point is that the object is bound to the relational database, and the object is used to represent the relational data. In the world of O/R Mapping, there are two

Vo is a mapping to a table in a database, and a table corresponds to a VODAO is to use VO to access the real table, the operation of the database is done in DAOBo is the business layer that does the logical processingVO, PO, BO, QO, DAO, POJOThe O/R Mapping is an abbreviation for the Object Relational Mapping.The popular point is that the object is bound to the relational database, and the object is used to represent the relational data. In the O/RIn

PO (named bean,entity, etc.) : persistant Object Persistent objects, the display state of records in a database table in a Java object The most vivid understanding is that a PO is a record in the database. The advantage is that a record can be processed as an object and can be easily converted to other objects. BO (named service,manager,business): Business Object Business Objects The main role is to encapsulate the business logic as an object. T

Business Chamber of Commerce operation is Bo once rich three generations of industry? 650) this.width=650; "style=" height:80px; "id=" Paperpicarea "class=" Lp_pic_type_3 "src=" Http://user.qzone.qq.com/ac /b.gif "alt=" B.gif "/>in the industry people feel not to join the people too silly, such a simple thing these people can not understand, we know just met this industry when there will be a lecturer told us 3800 can earn 3.8 million, 69800 can earn

Today with you to share some of the choice of water purifier knowledge, some very professional things may be the choice of water purifier when you do not understand, so I would like to briefly say.First of all, we probably think that the more the filter, the better, in fact, is not the case, there may be a lot of the market like a eight-level filter so look very powerful water purifier, but the basic is the PP cotton and activated carbon circulating filtration, this effect is really not very lar

The large number of professional abbreviations in the development of Java EE is confusing, especially with some experts to discuss the problem, three minutes by someone's mouth full of professional terminology spray halo, PO VO BO DTO POJO DAO, a lot of it came (heard Old Luo's critique of this phenomenon friend will smile). First of all, I am not a master of the statement, the following summary is their own experience. Please advise me on the wrong p

Po (persistant object) Persistent ObjectThe concept that appears during o/R ing does not exist if there is no o/R ing. usually it corresponds to the data model (database), and some business logic is processed. it can be seen as a Java object mapped to tables in the database. the simplest Po is to correspond to a record in a table in the database. A set of PO can be used for multiple records. the PO should not contain any database operations. VO (Value Object) Value ObjectIt is usually used for

A few words to understand POJO, JavaBean, EJB, DAO, DTO, VO, PO, BO, do 1. POJO POJO (Plain old Java Object) is called by Martin Fowler, Rebecca Parsons and Josh Mackenzie in a speech in 2000. According to Martin Fowler, "Plain old Java object" is literally translated as "pure old-fashioned Java objects," but everyone uses "simple Java objects" to address it. The implication is that there are some private parameters that act as properties of the o

data compared to some other business-to-business, consumer Web site traffic may not be too much, but the antique industry has his limitations, relative to this data on the author to see the No.1 has been antique mall. I observed that this site is based on a large number of long tail words to obtain traffic, the following we take the "Bloodstone price" as an example to detailed analysis of Bo Bao Mall's military, the first site posted out Http://shop

the alias table and the base table, and finally build the context. 2. What are the concepts, implementation methods, and advantages and disadvantages of derived tables and alias tables? The derived table is similar to the database view, and the alias table is renamed in the universe of the database physical table; The derived table can flexibly process complicated data logic, but it is inefficient; The alias table is set based on business needs and is generally used to solve the loop problem i

First of all, make love hanging machine This website is because of the chaos of the domestic hanging machine project, want to provide a good learning exchange platform for everyone, and the second is because the hanging brother has been in Bo Rui to get higher hanging machine income. So want to share it to everyone, for me also bring a good income for everyone. (*^__^*) hehe ...Website Description:Bo-RUI Network monitoring software is what we often ca

relationship to a PO.Create a BO object to process the resume. Each BO contains the PO.In this way, we can process the business logic for BO.VO:Value objectViewObject presentation layer objectIt mainly corresponds to the Data Objects displayed on the interface. For a WEB page, or a SWT or SWING interface, use a VO object to correspond to the value of the entire interface.DTO:Data Transfer ObjectIt is mainl

Java (Po,vo,to,bo,dao,pojo) class name Package name explanation2015-04-28 20:11 by Loull, 18 Reading, 0 reviews, Favorites, compilation VO: Value object, view object PO: Persistent object qo: Query ObjectDAO: Data Access Object--also DAO pattern DTO: Data Transfer Object--also DTO modePO: Full Name is Persistant object The most vivid understanding of persistent objects is that a PO is a record in the database. The advantage is that a record can be pro

network load, but here I refer to the data transfer objects between the presentation layer and the service layer.VO (View object) Value ObjectA View object, used for the presentation layer, that encapsulates all the data for a specified page (or component).BO (business object) service objectFrom the business model perspective, see the domain objects in the UML component Domain model. A Java object that encapsulates the business logic, by invoking the

Original Address:several objects of Java (Po,vo,dao,bo,pojo) explained MunandongOne, Po:persistant object persistent objects, can be seen as a Java object mapped to a table in the database. The simplest PO is a record in a table in the corresponding database, and multiple records can be used with a collection of PO. The PO should not contain any operations on the database.Two, Vo:value object value objects. Typically used for data transfer between bu

. ---------------------------------------------------------- Bo: Business Object Encapsulate the business logic as an object (which can include multiple Po. It usually needs to convert Bo into Po to realize data persistence. Otherwise, the PO obtained from the DB, must be converted to Bo for use at the business layer ). There are three main concepts about

methods. This method is used in combination with Po to perform operations on the database.There is almost no possibility or need to convert each other. It is mainly used to encapsulate access to the database. With pojo, pojo can be persistently converted into Po, and PO can be assembled into vo and DTO. Bo: BusinessThe object Business Object encapsulates the Java object of the business logic. by calling the DAO method and combining Po and VO for busi

A large number of professional acronyms in J2EE development are confusing, especially when discussing issues with some experts, they were dizzy by the technical terms in three minutes. Po VO Bo DTO pojo Dao, A lot of things are coming (friends who have heard of Lao Luo's criticism of this phenomenon will smile ). First of all, I declare that I am not a master. The following summary is my own experience. For more information, see. Po:Persistant Object

Invincible Bo PI Qian Kun big color-Previous Article: Usage Invincible Bo PI Qian Kun big color-Article: style description Invincible Bo PI Qian Kun big color-next article: script explanation Invincible Bo PI Qian Kun big color-support: Subsequent Updates If you have not downloaded the script file when reading [pre

A large number of professional acronyms in J2EE development are confusing, especially when discussing issues with some experts, they were dizzy by the technical terms in three minutes. Po VO Bo DTO pojo Dao, A lot of things are coming (friends who have heard of Lao Luo's criticism of this phenomenon will smile ). First of all, I declare that I am not a master. The following summary is my own experience. For more information, see. Po:Persistant O