vsm mapping

The real power of MyBatis is in the mapping statement.and the equivalent of JDBC to compare, mapping files save a lot of code.The construction of MyBatis is focused on SQL.The SQL mapping file has several top-level elements such as the following: (In order) The cache configures the caches for the given namespace.cache-ref references the cache configuration from o

MappersSince MyBatis's behavior has been configured by the elements of the MyBatis configuration file described in the previous article, we are now going to define the SQL mapping statement. But first we need to tell MyBatis where to find these configurations. Java does not provide a good way to do this, so the best way is to tell MyBatis where to look for the mapping file. You can use a resource reference

Tags: MyBatis SQL configuration file additions and deletions using SQL statements in SQL configuration fileConfigure additions and deletions in the SQL mapping file:1. Increase:Add the Insert label to the SQL mapping file and add the corresponding SQL statement. Add the corresponding method to the corresponding interface (based on the previous post example), and the method name matches the value of the id a

Brief introduction:The mapping between the POJO class and the relational database can be defined with an XML documentWith the POJO class's database mapping file, Hibernate can understand the relationship between persisted classes and data tables, as well as the relationship between persisted class properties and database table columns.Hibernate will generate various SQL statements based on this

JPA (Java Persistence API) is a Java persistence specification proposed by Sun. Provides an object/relational mapping tool for Java developers to manage relational data in Java applications. The overall idea of JPA is broadly consistent with existing ORM frameworks such as Hibernate and TopLink. In general, JPA includes the following 3 areas of technology:First: ORM Mapping meta-dataJPA supports both XML an

1. Why do I have a composite primary key mappingIn reality we may encounter many tables that may not have a primary key, so what would be the result of using it after mapping? Is it normal to get what we want? The result should not get the desired result, and the resulting may be the following error: caused by:org.hibernate.AnnotationException:No identifier specified for entity:xxx.xxx.xxx The result tells us that the Hibernate

Hibernate provides two ways to map relationships on a one-to-one basis:1) Follow foreign key mapping2) Follow the primary key mappingThe following is an example of the Employee Account form and the Employee Profile table (a one-to-two relationship between the employee account and the file table), which is described in the following two mapping relationships, and each of these mappings is used to perform persistent operations(1) The employee file is sa

I am a surveying and mapping engineering undergraduates, has been studying in school for more than two years, also contacted some related mapping software, such as Autocad,cass,matlab,cosa, also use them for certain use.AutoCAD has the basic functions of plane drawing, drawing aids, editing graphics, dimension, writing, layer management, three-dimensional drawing, network function, data exchange, etc., with

Type = "Hello. helloworld"Name = "helloform"Scope = "request"Input = "/Hello. jsp">Here, you have configured the INPUT attribute. When mapping. getinput () is used, it will read the configured INPUT attribute.Mapping. getinput () // return the input data page, that is, your Holle. jspThey all play the role of redirection. Next we will introduce Getinputforward () Mapping. getinput () and

Original Address http://www.cnblogs.com/flytrace/p/3387748.html I'm a stupid man. It is often more effective to speak to a dumb person after they have understood something. Before you see it, you have the basics of lighting.>> world/object space Normal mapLet's start with a normal map based on world or model coordinates (world/object space normal map). Not common, but basic.First of all, ignore the so-called normal map generated by Photoshop that you've been to before, except for art. It's just

First, model analysis User and Orders User---->orders One user can create multiple orders, one to many. Orders--->user An order is created by only one user, one-to-two. orders and OrderDetail Orders--->orderdetail An order can include multiple order details, as one order can purchase multiple items, each of which buys information in a OrderDetail record, one-to-many relationship. OrderDetail---> Orders An order detail can only be included in one order, and one for each. OrderDetail and Items

A record is actually another form of a tuple. By using records, you can associate a name for each element in a tuple.A mapping group is a collection of associations of key-value pairs. The key can be any of the Erlang data types.When to use a mapping group or recordRecords are another form of tuples, so they are stored in the same way as performance characteristics and tuples. The

Reprint: http://blog.csdn.net/zm2714/article/details/7924280Previous: ROS2.9.27 set up the Internet cafes soft routing real-world connection network, mainly on the establishment of soft-routed internet cafes ROS2.9.27 basic configuration, the purpose is to enable Internet cafes to connect the outside network smoothly. Not related to the more abundant other functions and network security, and so on, this chapter is mainly about setting up a Web server in Internet cafes as an example, leading to R

An ordinary Pojo class can be mapped to a persisted class by labeling @entity, and a persisted class can correspond to the data in the database. The mapping becomes an entity class to be dependent on some specific rules.1. Mapping entities (@Entity)The class labeled @entity annotation indicates that the class is a persisted class, and when in the container, the server will first load all the entity classes

CI Mapping (loading) data to the view layer method, Ciview The examples in this paper describe the method of CI mapping (loading) data to the view layer. Share to everyone for your reference, as follows: CI has a disgusting thing, it is necessary to put all the data into the $data array in order to map to the view layer, such as: Currently I search out the data mode from the link table of the Database (Lin

Eloquent Object relational mapping in PHP's Laravel framework is used, laraveleloquent 0. What is eloquentEloquent is the Laravel ' ORM ', which is ' Object Relational Mapping ', which is a relational mapping of objects. The advent of ORM is to help us make the operation of the database more convenient. Eloquent lets a ' model class ' correspond to a database ta

1. First define an entity User type that receives the data, and a userquery type for the input parameter.1 Public classUser {2 Public intID;3 PublicString username;4 PublicDate birthday;5 PublicString sex;6 PublicString address;7 }8 Public classUserQuery {9 PrivateString Orderbyclause;Ten PrivateListOredcriteria; One Public voidAddusernamelike (String username) { AOredcriteria.add (NewCriteria ("username like", username)); - } - Public voidAddsexg

corner is always (viewport width, viewport height). All mouse events and drag events, initially expressed in view coordinates, should be mapped to the scene coordinates to interact with the item.Coordinate mappingOften, shape mapping is useful when dealing with item in a scene, between the scene and item, between item and item, and between the view and the scene. For example, when you click a mouse in a qgraphicsview viewport, you should know which i

," and today the runtime throws the following exception:Java code Exception in thread "main" Java.lang.ExceptionInInitializerError ??? caused by:org.hibernate.MappingException:Repeated column in mapping for Entity:value. Bid column:item_id (should is mapped with insert= "false" Update= "false") Carefully examined the mapping file, found that the (1)What does adding not-null= "true" me

The new study Spring3.0,angularjs and Bootstrap, has been considering if the three together. Today, in the process of trying, encountered a stumbling block.No mapping found for HTTP request with URI [/springmvc/js/bootstrap.min.js] The configuration of Web. XML is as followsservlet-mapping> servlet-name>Mumuservlet-name> url-pattern>/url-pattern> servlet-mapping