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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 can be used for multiple records. The PO should not contain any operations on the database. Ii. VO: Value Object value object. It is us

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 Bored during the holidays, I went to a friend's house and fo

Read Catalogue 1.dao[data Access Object] data Access objects 2.dto[data Transfer Object] data transfer objects 3.po[persistant Object] Persistence layer objects 4.bo[bussiness Object] Business objects 5.vo[value Object] Value objects 4.pojo[plain ordiary Java Object] Simple Java objects Admire the ability to be complex and difficult to understand the technology, abstract into simple and easy to understand things peopl

What does vo, PO, BO, DAO, pojo mean in java?Recently in the project, met vo, my God ... Then learn to remember it together.Let's start with a simple explanation:the o/r Mapping is an abbreviation for the object relational Mapping. Simply put, the object is bound to the relational database, and the object is used to represent the relational Data.Java WEB three-tier Architecture We need to be skilled at it.VO: Value ObjectCreated with the new keyword,

object-oriented approach to deal with the problem.For example, if we have 100 fields in a table, then the corresponding PO has 100 attributes. However, as long as we display 10 fields on the interface, the client uses WebService to fetch the data, and there is no need to pass the entire PO object to the client, we can pass the result to the client with a DTO with only these 10 attributes. This also does not expose the service-side table structure. After reaching the client, if the object is use

the number of distributed calls, thereby improving the performance of distributed calls and reducing 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 i

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

August 9, the famous Internet veteran Zhang Yingjun on his personal blog, said that its operating Bo Yi Network (anyp.cn) because some personal sites have violated content, by the higher authorities closed. The news is really shocking! In shock, there are four questions? The question is, "because of some of the angry mouse excrement" is what contributed to the content? To the point where the superiors are angry and ordered to shut down? Not standar

Visit pigeon Network: http://www.blogdove.com/ Download Now: Bo Ge v1.6 (875kb) New Features of Bo Ge v1.6: (released on February 1) 1. EnhancedProgramStability and running speed; 2. The interface effect is beautified and the layout is more reasonable; 3. added the function of saving webpages and displaying favorite URLs; 4. added a new webpage display style, which is pleasing to the eye; 5. built-in

objects between the presentation layer and the service layer.VO (Value object) value objectsTypically used for data transfer between business tiers, as is the case with PO, which contains only data. But it should be abstracted out of business objects that can correspond to tables, or not, depending on the needs of the business. Created with the new keyword, collected by GC.BO (business object) service objectFrom the business model perspective, see the domain objects in the UML component Domain

public static mapWebserviceparambo Webserviceparambo) {field[] fields = Webserviceparambo.getclass (). Getdeclaredfields ();hashmapfor (Field field:fields) {Variables that can be obtained to the private propertyField.setaccessible (TRUE);try {The name obtained is the attribute in the Bo object, Field.get (Webserviceparambo) is the value of the incoming Bo objectData.put (Field.getname (), Field.get (Webserv

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 business object: The main function of the operational objects is to encapsulate the business lo

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There are things to "weave a scarf"-more and more netizens are becoming "micro-blog control." And for a long time, "micro-bo control" will find that the need to maintain micro-blogging more and more time, previously did not care about the small operation will become a cumbersome burden. 工欲善其事, its prerequisite. Try to be proud to swim 3 browser, will let you in "weaving the scarf" time, more comfortable, relaxed. One-click to open Weibo How do you o

Perhaps some children's shoes will be very puzzled, why have micro-Bo Shou function, but can not save it, the effect of the picture below, the bottom is not saved two words, can not set it? In fact, can be set, but the children's shoes to find the wrong setting, this is just copy code, especially troublesome and delay everyone's time, The following small series will tell you how to quickly save the micro-Bo

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. implementing the DAO pattern can be more focused on writing data access Code.DAO mode is one of the standard Java EE design patterns. developers use this pattern to separate the underlying data access operations from the business logic on top. A typical DAO implementation has the following components:1. A DAO factory class;2. A DAO interface;3. A specific class that implements the DAO interface;4. Data passing objects (sometimes called value objects).The specific DAO class contains the logic t

Want to make your own small device secure access to the cloud, open Bo as a record.Objective: To design and implement an application based on ARM MCU to access cloud, and connect itself with some devices.To meet:(1) Device Access cloud: Choose a suitable cloud service to meet the access services and common operational controls,(2) Support remote upgrade: Can upgrade the device through the cloud, even if the device hangs, can support the forced upgrade

object) persistent objects, usually corresponding to the data Model (database), itself also has some processing of the business logic. 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. VO (Value object) value objects, typically used for data passing between business tiers, are just like the PO and c