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composite primary key hibernate mapping of an example

MealfeeDetail.hbm.xml MealfeeDetail.java Database table fields:

Hibernate composite primary key of the simple application of

1, written by someone else examples of Web site address: http://www.blogjava.net/alex/archive/2006/11/09/80231.html 2, you can also see the video Xinghua teachers also have to explain, pay attention to areas shown in Figure instructions. Click the pi ...

hibernate3 annotations to generate an embedded composite primary key or primary key of the method and examples of

The continuous development of Hibernate, Java database persistence almost become a de facto standard, because it is very powerful, flexible, and possess excellent performance. Traditionally, Hibernate configuration depend on external XML file: database ma

hibernate composite-id

Encounter the following problems: In the browser display getSession (). Save (...) sentence has been reported nullException. First of all, the problem is definitely not getSession reference to the use of the Internet are so used, getSession () and th ...

Hibernate composite primary key

When a table has multiple fields in a composite primary key, hibernate how to handle it? As follows: Configuration is as follows: POJO as follows: We combined the two primary key fields in a POJO in the extracted. And as a component of another POJO. ...

hibernate configuration and use of composite primary key

When using the hibernate sometimes encounter configuration and use of composite primary key, such as the following table is to use a composite primary key So when in the configuration file to use hibernate composite-id to identify a compound primary key p

The composite primary key Hibernate

First, the database is as follows (MS-SQL2005): - Create a person table - Delete Person table DROP TABLE person; - Create Person Form CREATE TABLE person ( name VARCHAR (100) not null, phone VARCHAR (50) not null, age INT, PRIMARY KEY (name, phone) )

Java equals and hashCode in on some understanding of the function 1 (transfer)

JDK's java.lang.Object class implements the equals function, defined as follows: The specific implementation code as follows: Java code public boolean equals (Object obj) { return (this == obj); } From the above we can see the code, Object class

Hibernate fine-grained classification and composite primary keys

Fine-grained division Person.hbm.xml profile <? Xml version = "1.0" encoding = 'UTF-8'?> <! DOCTYPE hibernate-mapping PUBLIC "- / / Hibernate / Hibernate Mapping DTD 3.0 / / EN" "Http://hibernate.sourceforge.

Development of commonly used open source J2EE project

Read other people's records, feel good, on the collection here, Original Source: http://blog.csdn.net/fenixshadow/archive/2007/11/17/1890010.aspx Persistence Layer 1: 1) Hibernate This need not introduce, and used very frequently, used more are mapped

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Report required because of a need to link the three statistical tables, and more complicated sql statements, and Table 3 are the data of millions of magnitude. All of my beginning Selection of native SQL are the way to the implementation of the query. But

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This book includes the following sections: Chapter 1 Introduction Chapter 2 to create and destroy objects Article 1: Consider static factory methods instead of constructors Article 2: dealing with multiple constructor parameters to consider when building

Struts2 type converter

First, an overview of the B / S application, will be converted to the corresponding request parameter string data type is a MVC framework provides the function, while the Struts2 is a good MVC framework for realization of those, of course, provides the ty

JPA annotation for reference

(Change) Table Table used to define the entity primary table name, catalog, schema and other attributes. Metadata attribute Description: · Name: table name catalog: corresponds to a relational database in the catalog · Schema: the corresponding relational

Hibernate3 Study Notes

A . Use Hibernate to achieve the purpose of data storage 1. New Project Hibernate _0100_HelloWorld 1.1 New Student under the project .java, Package called com .bjsxt.hibernate.model, Source code is as follows : package com.bjsxt.hibernate.model; public cl

Common JPA annotation for reference

Table Table used to define the entity primary table name, catalog, schema and other attributes. Metadata attribute Description: · Name: table name catalog: corresponds to a relational database in the catalog · Schema: the corresponding relational database

hibernate annontaion learn more

Hibernate Annotation Description Turn http://relucent.javaeye.com/ @ Entity public class Flight implements Serializable ( Long id; @ Id public Long getId () (return id;) public void setId (Long id) (this.id = id;) ) @ Entity annotation to a class declarat

Some summary Hibernate

1, the first hibernate program: 1. New Java Project 2. Create User Library, add the following jar * HIBERNATE_HOME/hibernate3.jar * HIBERNATE_HOME / lib / *. jar * MySql jdbc driver 3. Create a hibernate configuration file hibernate.cfg.xml, in order to f

Hibernate Summary (2)

This summary information Shangxue Tang video "Hibernate" Hibernate Summary (1) 12, many to many association mapping 1, the specific mapping: <set name="roles" table="t_user_role"> <key column="userid"/>

15.JPA in the joint primary key

Composed of two or more fields in the primary key, we call the joint primary key. In object-oriented, we define how to use JPA situation? How to define the joint primary key? Object-oriented ideas to think about it, the joint primary key in the composite

Hibernate mapping summary

1. Many to one mapping Object Model: User Group id: int name: String group: Group id: int name: String Mapping: <hibernate-mapping package="com.nintenyun.hibernate"> <class name="User" table="t_user"> <id

Hibernate second tutorial

1. Hibernate Common Interface 1.configuration (org.hibernate.cfg.Configuration) Configure hibernate, start hibernate, creating SessionFactory object 2.SessionFactory (org.hibernate.SessionFactory) Initialize hibernate, creating session object, usually a s

Shangxue Tang Hibernate Notes

Quote New Project 1 2 learning to build user-library-hibernate, and add the appropriate jar package a project right-build path-configure build path-add library b select the user-library, in which the new library, lives life to hibernate c in the library n

hibernate reference handwriting

Hibernate Hibernate --- my study notes 2009-06-19 On: wcily123 Source: wcily123's blog Layered software development ideas: Three-tier architecture: Data presentation layer business logic data persistence layer SUN desktop applications Swing AWT Ordina

------ Novice must-read study notes Hiberbate

First hibernate program: 1, the new java project 2, create a User Library, add the following jar * HIBERNATE_HOME/hibernate3.jar * HIBERNATE_HOME / lib / *. jar * MySql jdbc driver 3, create a hibernate configuration file hibernate.cfg.xml, in order to fa

Turn-JPA Annotation Reference (2)

Source: www.oracle.com ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ The main contents are as follows: Explained in detail the meaning of the following eight comments and annotations contained in the attributes: @ Basic @ Col

Turn-JPA Annotation Reference (3)

Source: www.oracle.com ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ The main contents are as follows: Explained in detail the meaning of the following 10 comments and annotations contained in the attributes: @ Entity @ Entit

Hibernate engine to accelerate your

1 Introduction Hibernate is the most popular fixed-line to provide data and query the ORM engine. In your project into Hibernate and it can work is very simple. However, it works very well require a lot of contributions of time and lots of experience. Thr

Detailed JPA annotations (D)

@ Embedded By default, JPA persistence provider assumes that each entity are persisted to its own database tables. With the @ Embedded annotation to specify a persistent field that the @ Embeddable type can be stored as an intrinsic part of the owning ent

Common abnormalities resolved

ConcurrentHashMap and CopyOnWriteArrayList comparison. Blog categories: Java ConcurrentHashMap ConcurrentHashMap introduced Segment, each Segment is a hashtable, the equivalent of two Hash table, and then lock in the Segment level, and increased concurren

JPA turn common reference mark hibernate annotation

Table Table used to define the entity primary table name, catalog, schema and other attributes. Metadata Property Description: • name: table name • catalog: correspondence between the catalog database • schema: the corresponding relational database s
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