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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
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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
Use love Bo QQ mailbox Search machine display search out more than 8,000 data, but I exported to only 2000 data around, how to solve this problem?
This is because the last few pages of the returned data are caused by the same, the export of automatic filtering repeat.
I look for the Xuhui district of Shanghai, can be found in the search for QQ, some address only specific to Shanghai, not specific to Shanghai Xuhui, and some are not online.
QQ infor
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 used to display the corresponding interface, then its identity will be c
service transmissions and Vo is used for the display of interfaces, and the DTO can be converted to VO for the foreground. 3. For example, in struts, using Actionform as VO requires a conversion because the PO is object-oriented and Actionform is corresponding to the view, which is to synthesize a actionform of the attributes to be displayed by several po. You can use the Beanutils copy method.
3. BO (business object) business Object
(understood as
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
Long time no whole problem, not without good title, just lazy too lazy too lazy ... Hurriedly tidy up a few questions to mend your own sins ...DescriptionBo is a ' life Winner '. He likes playing chessboard games with his girlfriend G.The size of the chessboard is NXM. The top left corner is numbered (all) and the lower right corner is Numberd (n,m).For each game,bo and G take turns moving a chesspiece (Bo
business operations. You can see an example on the Internet:such as a resume, education experience, work experience, social relations and so on.We can have an education experience corresponding to a PO, work experience corresponding to a PO, social relations corresponding to a PO.Create a CV-based Bo object to process resumes, each BO containing these po.When we handle business logic like this, we can deal
flagGet page ContentOn the premise that the content of the page is determined, the page content acquisition is the most important part, through the analysis of the page Dom node, each to obtain the required information:#在页面有内容的前提下, get content def getcontent(): #寻找到每一条微博的classnodes = Driver.find_elements_by_xpath ("//div[@class = ' wb_cardwrap s_bg2 clearfix ']")#在运行过程中微博数 ==0, may be a micro-blog anti-crawling mechanism, need to enter a verification code ifLen (nodes) = =0: Raw_input ("P
Public platform Development public platform development Model Enterprise public platform tree hole Micro bo tree cave Renren Tree Cave
Author:Square Double Studio
Address: http://www.cnblogs.com/txw1958/p/weixin-65-weibo-treehole.html
Fairy tale "The emperor has a donkey ears", said a king has a pair of donkey ears, each to his hair cut the person will be tempted to tell others, thus be beheaded. There is a barber to hide this secret very har
A series of articles on the Bo Ge client architecture will detail the key technical systems of the Bo Ge client, including the channel management, subsystem architecture, interface management, and automation technologies of the Bo Ge client. The first article focuses on how channels are organized. Other topics will be introduced in the future :-)
Pigeon Network:
conjunction with PO, DAO contains various methods of operation of the database. Through its method, combine the PO to carry on the related operation to the database. Sandwiched between business logic and database resources. With Vo, provides a crud operation of the database.BO: (business object), operational objects LayerAll entity classes that represent "things" in the application realm. These entity classes reside on the server and take advantage of the service classes to assist in fulfilling
business operations. You can see an example on the Internet:such as a resume, education experience, work experience, social relations and so on.We can have an education experience corresponding to a PO, work experience corresponding to a PO, social relations corresponding to a PO.Create a CV-based Bo object to process resumes, each BO containing these po.When we handle business logic like this, we can deal
This article explains how to add fonts to the Web Intelligence Report component of SAP Business objects. Because the system default preset font is too ugly for Chinese, some font special meow directly to the Chinese into square box!First, the system environment:SAP businessobjects Business Intelligence (BI) 4.xWindows server2008r2Sample font: Microsoft BlackSecond, the Operation procedure1, first to ensure that "Microsoft ya Black" font has been installed in the Windows system ("Installation" re
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
Let's say I created the following very simple custom Bo in cloud Studio:I want to generate some examples of this bo. My previous practice was to create an editing UI for this custom Bo. Then use these UI to create a Bo instance. This is a time-consuming approach.There is another easy way to do this: no UI required, but
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