hibernate mapping

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Hibernate Journey (Fri) Hibernate mapping--basic class mapping and object relational mapping

Recall that when we did not learn ssh, when we build the database table, the first is the database modeling e-r diagram, and then through the entity model to establish the relationship model, and then establish the corresponding table. There are three relationships between entities, one-to-many (or many-to-two), many-to-many. And now we're going to map the table based on the class, which can only be mapped by mapping files to the relationship between

[Original]java Web Learning Note 81:hibernate Learning Path---Object relational mapping file (. hbm.xml): hibernate-mapping node, class node, ID node (primary key generation policy), property node

The purpose of this blog: ① summary of their own learning process, equivalent to study notes ② to share their own experience to everyone, learn from each other, communication, not commercialcontent inevitably appear problems, welcome to correct, exchange, discussion, you can leave a message, can also be contacted by the following ways. I Internet technology enthusiasts, Internet technology enthusiastsWeibo: Ivan is in 0221qq:951226918--------------------------------------------------------------

Hibernate mapping File Quick build: Use Codesmith to quickly generate mapping files and mapping classes

="4" sql-type="int" not-null="true" unique="true"/>"native" />--对象Person的Name属性和表t_Person中字段t_Name建立映射关系-->name="Name" type="String">column name="t_Name" length="50" sql-type="varchar" not-null="false"/>"font-family:FangSong_GB2312;font-size:18px;"> This is the map file generated by the table automatically nhibernate and mapping class (that is, we have handwritten entity) the approximate use of the method, is not very simple it?! It saves a lo

Hibernate base------>hibernate Collection Mapping--->set mapping

Set Set mapping Set set mapping is simple, I feel a bit like a one-to-many relationship (only a single PO's a-to-many relationship), because it can be a table and two hibernate necessary configuration, a run class on it. The code is as follows (for example, people address) First write the JavaBean model class (person) Package one; Import Java.util.Set;

A brief analysis of Hibernate mapping (II.)--Relational mapping (3)

Bidirectional one-to-one correlation mappingAs with one-way mapping, bidirectional mappings can still be implemented in two ways: 1, primary Key Association, 2, unique foreign Key Association1. Primary Key AssociationThe mapped relational model is the same as one-way:The difference between a mapping file and a one-way is that you need to add a User.hbm.xml[HTML]View Plaincopyprint? XML version="1.0"?>

A brief analysis of Hibernate mapping (II.)--Relational mapping (4)

Unidirectional one-to-many association mappingsThe mapped relational model:Map file:A one-to-many correlation mapping and a multiple-to-one correlation mapping principle are consistent, with the addition of a foreign key to one end of a multi-pointThe difference between them is that they maintain different relationships:* Many-to-one maintenance relationship is: a multi-point relationship, with this relatio

. Hibernate one-to-one mapping and component mapping

1. Follow the foreign key mapping ( Hibernate provides two ways to map one-to-one relationships: by foreign key mapping and by primary key mapping Implementation needs:Create an entity class Users1 and Resume1 Publicclass Users1 {Private Integer userid;Private String username;Private String Userpass;Private Resume1 res

Hibernate mapping File vs mapping annotations

ObjectiveFor Java developers, annotations should not be an unfamiliar concept, as early as the javase phase, such as the @override tag overriding the parent class method or implementing an interface method, @Test tag unit test method, so we can simply interpret it as a tag with special meaning ... In the development process, we can also use annotations to replace the configuration file implementation of related features, such as Java Web Development, 3.0 version, the use of @webservlet, @WebList

Hibernate mapping Parsing (i)--basic mapping

before we understand the hibernate framework, we should first understand the concepts of object-relational mapping (ORM) and relational database. Object-Relational mapping (ORM) is primarily a mapping of the implementation of program objects to relational database data. Why do you say that? A relational database is a m

Configuration of the Hibernate mapping file configure the core file one-to-one pair multiple hibernate implementation paging Hibernate session closure problem summary

Take the message system as an example1. Configure the mapping file: first you have to introduce a constrained DTD"-//hibernate/hibernate Mapping DTD 3.0//en""Http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd" >Then The 2. Cor

A brief analysis of Hibernate mapping (II.)--Relational mapping (5)

One-way many-to-many association mappingsOne-way many-to-many association object model:The mapped relational model:Many-to-many mappings produce a third table to maintain relationshipsMap file:User.hbm.xml[HTML]View Plaincopyprint? XML version="1.0"?> "-//hibernate/hibernate Mapping DTD 3.0//en" "Http://hibernate.sourceforge.net/

Hibernate mapping (ii)--many-to-one relationship mapping

  on A study Hibernate The basic mapping, that is, single-table mapping, it is easy to understand, but for the relational database, the existence of a relationship between tables is not very small, the relationship between the database is established through the main foreign key , the reaction to Hibernate How do you

SSH Deep Adventures (i) Hibernate architecture (i)-------mapping analysis--seven mapping relationships

ORM. The full name is (objectrelational Mapping), which is the objects relational mapping. The idea of ORM is to map the data of tables in a relational database into objects. Presented in the form of objects. This enables developers to translate the operations of the database into operations on those objects. Hibernate is the realization of this idea, to facilita

"SSH Advanced path" hibernate mapping--multiple-to-one one-way correlation mapping (iv)

"SSH Advanced Path" Hibernate fundamentals (i) , the small part introduces the basic principle of hibernate and its core, using the object-oriented thinking operation relational database. "SSH Advanced path" hibernate build development environment + Simple example (ii) , Xiao-bian set up the basic hibernate development

"SSH Advanced path" hibernate mapping--one-to-one unidirectional correlation mapping (v)

"SSH Advanced Path" Hibernate fundamentals (i) , the small part introduces the basic principle of hibernate and its core, and adopts the object-oriented thinking operation relational database. "SSH Advanced path" hibernate build development environment + Simple example (ii) , the small series built the basic Hibernate

Hibernate learning 4-hibernate ing file 1-hibernate-mapping Element

The Hibernate ing file contains a hibernate-mapping element, which includes optional attributes, such: (1) Schema (optional): name of the database schema. (2) catalog (optional): name of the database catalog. (3) default-cascade (optional-the default value is none): the default cascade style. (4) default-access (optional-property by default): the policy tha

"SSH Advanced path" hibernate mapping--one-to-one bidirectional correlation mapping (vi)

Previous blog post "SSH Advanced path" hibernate mapping-one-to-one unidirectional correlation mapping (v), we introduced one-to-two unidirectional association mappings, one-way refers to the ability to load the identity card (Idcard) only from the person's side, but in turn. It is not possible to load personal information from the identity card side. What you se

"SSH Advanced path" hibernate mapping--one-to-one unidirectional correlation mapping (v)

"SSH Advanced Path" Hibernate fundamentals (i) , the small part introduces the basic principle of hibernate and its core, using the object-oriented thinking operation relational database. "SSH Advanced path" hibernate build development environment + Simple example (ii) , Xiao-bian set up the basic hibernate development

Hibernate mapping (i)--basic mapping

The basic understanding of object-relational mapping (ORM) has been reflected in two previous blogs.ORM Basic UnderstandingOn the mapping scheme of ORMWhat we are learning today is Hibernate's object-relational mapping.several ways to map hibernateBasic MappingConfiguration of mappings in Hibernate in XML, we want to map the object and table to the transformation

An analysis of Hibernate mapping (three)--inheritance mapping

Example Object Model:There are three ways to implement inheritance mappings:(i) one table for each class of tree inheritanceRelational Model:Map file:[HTML]View Plaincopyprint? hibernate-mapping package="Com.jialin.hibernate"> class name="Animal" table="T_animal" lazy="false"> ID name="id"> generator class="native"/> ID> discriminator column="type" type="string"/> prop

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