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From: http://blog.csdn.net/hlf48641715/archive/2008/12/25/3605789.aspx Several Java objects (PO, Vo, Dao, Bo, pojo)I. Po: persistence object of persistant object. It can be regarded as a Java object mapped to a table in the database. The simplest Po is to correspond to a record in a table in the database. A set of PO

Pojo = pure old Java object or plain ordinary Java object or what ever.Po = persisent Object Persistent Object In other words, in some object/relation mapping tools, the persisent object that can maintain database table records is a pure Java object that complies with Java Bean specifications, without adding other attributes and methods.First, we need to differentiate the persistence object (PO) and pojo.The persistent object must actually correspond

Definition Most of the time, if you want to know whether vendor can be delivered according to our po requirements, you need vendor to confirm. Order acknowledgement is the function to maintain the validation information in the Po. Of course, this information can be manually maintained or returned through the system with EDI's vendor. Acknowledgement information includes 1. order acknowledgements

Po:persistent Object Persistent Objects1. Sometimes also known as the data object, the corresponding entity in the database, you can simply think of a PO corresponding to a record in the database.2. The Hibernate persistence Framework is closely related to insert/delet operations.3. The PO should not contain any operations on the database.---------------------------------------------------------Pojo:plain o

I have always had a conflict: whether PO can be used in the business logic layer as Vo, or whether to separate the two. In many forums, the competition between the two is fierce. So today I plan to write down my thoughts. First, Java has several objects (PO, Vo, Dao, Bo, pojo) I. Po: persistence object of persistant object. It can be regarded as a Java object m

One, 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 b

It is a pity that several brothers upstairs are still discussing such a problem. I have posted many posts on such a question. Unfortunately, I don't know much about it and I don't think much about it.What is po? Is it in the middle of hibernate? I will not reply to the specific things if I discuss them. However, when we see that the architecture has been promoted, but some basic concepts are not clear, I think I should reply.Is there any

PO (Persistant object) Persistent objectThe concept that occurs at the O/R mapping, without the O/R mapping, does not exist. Usually the corresponding data model (database), itself also has some business logic processing. 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

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 processed as an object and can be easily converted to other objects.BO: The full name is busin

1.PO (Persistant object) Persistent objects?? The concept that occurs at the O/R mapping, without the O/R mapping, does not exist. Usually the corresponding data model (database), itself also has some business logic processing. 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 collecti

Role of Struts, spring, and Hibernate at various layers 1) struts is responsible for the web layer. ActionFormBean receives the data submitted by the form on the webpage, processes the data through the Action, and forwards the data to the corresponding webpage. Defined in the struts-config.xml, ActionServlet loads. 2) spring is responsible for business layer management, that is, Service (or Manager ). 1. The service provides a statistical call interface for action to encapsulate the DAO of the p

There is a kind of beans in the world called Sweet carton. It is said that the dead are sleeping There is a kind of soup called "Meng Po Tang" in the world. It is said that it can wake up and sleep, but make people lose their memories. There is a kind of grass in the world called the soul grass It is said that the ability to restore memories will lead to death. the distant ringtones are trembling. when the sky is dark, then let go ...... that's

PO (Persistent object) Persistent objectThe concept that occurs at the O/R mapping, without the O/R mapping, does not exist. Usually the corresponding data model (database), itself also has some business logic processing. 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

after referring to a large amount of information about various O, record the understanding and application that I have summarized as correct: 1. PO (Persistant object) Persistent object (interpreted as the DAO layer: The Received and returned Java Bean, which is typically written in the model package) 1. Sometimes also referred to as the data object, the corresponding database of entity, you can simply think of a

Http://www.hollischuang.com/archives/553?hmsr=toutiao.ioutm_medium=toutiao.ioutm_source=toutiao.ioPO (Persistant object) Persistent objectThe concept that occurs at the O/R mapping, without the O/R mapping, does not exist. Usually the corresponding data model (database), itself also has some business logic processing. 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, a

PO (Persistant object) Persistent objectIn the case of the O/R mapping, there is no such concept if there is no O/R mapping. Usually the corresponding data model (database), itself also has some business logic processing. It can be seen as a Java object mapped to a table in a database. The simplest PO is a record in a table in the corresponding database , multiple records can be used with a collection of

PO (Persistant object) Persistent objectIn the case of the O/R mapping, there is no such concept if there is no O/R mapping. Usually the corresponding data model (database), itself also has some business logic processing. It can be seen as a Java object mapped to a table in a database. The simplest PO is a record in a table in the corresponding database , multiple records can be used with a collection of

Tags: blog HTTP Io ar use Java SP data on Http://blog.csdn.net/zjrbiancheng/article/details/6253232 Concept:VO (view object): A view object used to display layers. It encapsulates all data of a specified page (or component.DTO (data transfer object): Data Transmission object. This concept comes from the J2EE design mode. The original purpose is to provide coarse-grained data entities for the Distributed Application of EJB, to reduce the number of distributed calls, so as to improve the perfo

In the Java EE, it is often mentioned that several objects (object), understanding their meanings can help us to better understand the object-oriented design thinking. NBSP pojo (plain old Java object): Ordinary Java objects, distinct from special Java objects (including inheritance constraints, etc.) and EJBS. Pojo generally only has a series of properties and corresponding get, set methods. po (Persistant object): Persisted objects, different fr

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 basic and important things to understand, namely Vo,po. Their relationship should be independent of each other, a VO can be just a PO part, can also be a number of